Delphi match string MatchText determines if any of the strings in the array AValues match the string specified by AText using a case insensitive comparison. StartPos specifies the beginning position in Input to begin the search. Text. For a case insensitive match, use the MatchText routine. ), any Depending on how you're using the extracted characters later I'd consider checking the length of the string and setting a boolean if it's not long enough. delphi; Share. Thanks! I need to know if all characters in a string are equal (formed by the same character). example if "grant" is in the array and i type exactly "grant' it will find it. Length specifies the substring, starting at You would be matching also 00000000000000 with such pattern. Improve this answer. success then begin //do stuff with match here end; end; Something to remember when working with groups is that a match's Groups collection always returns the entire match as group 0, so the groups from your expression start at 1. Commented Dec 7, Regular expression in Delphi for all matching lines in a StringList [closed] Ask Question Asked 4 years, 5 months ago. cff, Result is always True because it matches the strings with some and other whereas I expect it to find some. It works very good, the only problem is you need to type an exact match string. pds ad other. Viewed 1k times Pattern: string; Options: TRegExOptions) shows that a TRegEx is created at every invocation Description. But how to get my the value of '[0-9][0-9][0-9][0-9][0-9][0-9][0-9]' of my pattern to put in my . I need a little help with a function. The result will be the replacement string. For example: String: 9912, 1. Go Up to Manipulating Strings in a List. 6. Code Ideally I would like a way to test an individual row against the filter to see if it matches without filtering it out of the dataset (I want to highlight rows that match the filter). Community Bot. Indicates whether one string is a (case-sensitive) substring of another. IndexOf method Gets the index position of the first string matching the given string. FileSearch(const File search in Delphi is ignoring some Windows directories. Thanks a lot! Delphi. Upon getting a match, you save the current i and break the loop, and then if i > (number of 1` cases)` then Volume := '2' otherwise, Volume := '1' I haven't worked with Delphi, but that should be possible. That is a bad idea, since then strings "AB" and "BA" would have same the same hash value. I want to replace character in a big string all character @ by #13#10 if they match the pattern. Delphi converts the UTF-8 encoded string into UTF-8 as though it was 1252. The pattern string can have as many of these pattern Compares a string with a list of strings - returns match index Function : AnsiLeftStr : Extracts characters from the left of a string Function : AnsiMatchStr : Returns true if a string exactly This function takes two parameters: AString, which is the string to search within, and AChar, which is the character to search for. Share. I wrote this function that works well, but I'm looking for a more optimal (fastest) solution, the strings can have thousands of chars. I have this function to check if a string is a regular expression and it works fine : function IsValidRegEx(aString: string): It would not be too hard to make direct calls to the PCRE library behind Delphi's regex class, Regular expression dilemma when trying to match strings. SysUtils. PWideChar should be PAnsiChar instead. RegularExpressions unit. Follow Description. Matches(searchMe); for match in matches do begin if match. What is in sl1[2] can now be in sl2[7]. RegularExpressions. asked Feb 10, 2011 at 21:51. The TIniFile class is a wrapper of the Windows API for INI files. Description. The first string can be anything, but should not contain pattern characters (* or ?). It must be either a newline, or the void after the string, for $ to match the position before the current character. typedef System:: UnicodeString __fastcall (__closure * TMatchEvaluator)(const TMatch & Match); Contents. Nearly all regex engines support it: /G[a-b]. Ugh! Delphi extract string between to 2 tags. Commented Nov 11, 2016 at 15:51. MatchesMask returns true if the string matches the mask. These functions search for exactly one character, whereas LastDelimiter searches for any of several characters from the given list of I'm developing an algorithm to parse a number out of a series of short-ish strings. 2 Tokyo i just do: [string] := ComboBox. Not directly, no. That's quite a different question. IndexOf finds exact matches only; if you want to match partial strings, you must iterate through the string list yourself. Inside this method you have access to the whole match content. */i string. – Ron Maupin. But the cursor does not move to the first (or any) match. var FirstName: String; LastName: String; Age: Integer; I want a function where I can pass in the variable and then get back the name of the variable as a string. Since that is the case after the example, the dollar matches successfully. – Moves a string from one index position to another, shifting other strings around as appropriate. In comparison with a previous version this handles the case when you have a string with missing closing bracket like for instance My [favorite color is. The edit mask string consists of three fields with semicolons separating them. 1. Delphi: The String Grid component This page is information rich, and a has search button at the bottom of the page. If the string does not contain 1 and only 1 formula call, but does contain one or more operators, it should not match. The string list can be specified as a square bracket delimited list, as in the example, or as an array of strings. Delphi Questions and Answers ; General Help ; How to replace whole words in a string Sign in to «\b» Match the character string “abc” literally (case insensitive) «abc» Assert position at a word boundary (position preceded or followed—but not both—by an ASCII letter, digit, or underscore) «\b» Created procedure TFfileSearch. Match matches the Input string to the regular expression in the Pattern parameter if it is present. Thus, if S matches the first string in the list, IndexOf returns 0, if S You can assign it to a String variable with a simple assignment: var // My string variable myString: String; begin // Edit1 is the Name of the control myString := Edit1. Basics Home | Strings and chars: String operations: Type : Name : Summary Function : AnsiCompareStr : Compare two Function : AnsiIndexStr : Compares a string with a list of strings - returns match index Function : AnsiLeftStr : Extracts characters from the left of a string Function : AnsiLowerCase : Change upper case characters in a But a longer string is greater than a shorter, otherwise matching string. See also this question: How to search for similar words for solutions in Delphi. Modified 7 months ago. Copy returns a string containing a specified number of characters from a string or sub array containing Count elements starting at S[Index]. How do I deal with this regex issue? 4. We should keep in mind some things: String in Delphi is 0-based for mobile platforms and 1-based for Windows. Note that case-insensitivity is especially emphasized in descriptions. Compares a string with a list of strings - returns match index Function : AnsiLeftStr : Extracts characters from the left of a string Function : AnsiLowerCase : Change upper case characters You can use AnsiMatchStr()/AnsiMatchText() to check if a string matches one of the string in an array. If you want to match the entire string where you want to match everything but certain strings you can do it like this: ^(?!(red|green|blue)$). I MatchText determines if any of the strings in the array AValues match the string specified by AText using a case insensitive comparison. A regular expression (RegEx) is a sequence of characters that form a search pattern where some characters have a special meaning. Related commands If I Search in Files I get the Search string 'fun. For example, to search for 'String A', 'String B' or 'String C' The Delphi language supports short-string types - in effect, subtypes of ShortString - whose maximum length is anywhere from 0 to 255 characters. To the s string I want to add only items that are missing and didn't change the position. if i type the string as example abcdefgÄ the result returned True and i did not specfiy Ä in the regex pattern In Delphi 10 / Seattle, I am trying to do a nested String test The function expects to return a categories item, if a match is found. For example, If Length(Something) >= 5 then HaveSerial:=True; When needed you can test with If HaveSerial then Just a thought because you'll get an empty string if it's not long enough. In fact, most Ansi* functions are calling those APIs and are slow if the whole Unicode handling is not necessary (e. Commented Dec 7, but I did use it on Delphi 7. 3) derive a new class from TStringList and override its virtual CompareStrings() method to compare strings however you want (the default Is there a routine available in Delphi 2007 to convert the characters in the high range of the ANSI table (>127) to their equivalent ones in pure ASCII (<=127) according to a function OStripAccents(const aStr: String): String; type USASCIIString = type AnsiString(20127);//20127 = us ascii begin Result := String Here is an optimized version of the function, which uses pointer char iteration without string manipulation. How to move forward. The main difference from the original class is that the items are stored in the separate StoredItems property instead of the Items as usually (used because of simplicity). i also need a pattern to match string from a specific number to the end. This approach can be used to automate this (the following exemplary solution is in python, although obviously it can be ported to any language):. The only way to properly compare 2 Ansi strings in Delphi is to do it yourself, Ansichar by AnsiChar. Follow edited May 23, 2017 at 12:34. 9. Commonly Used Routines for AnsiStrings Consume the first char from the search string "o" and look it up in the lookup table. (Partial-key matching is when the This will work for strings, file names, images (you can get the unique hash code for an image), etc, and I guarantee that this will be as fast or faster than any other impementation. It returns true if at least one of the strings in the array MatchStr determines if any of the strings in the array AValues match the string specified by AText using a case sensitive comparison. How to match for an empty string using Delphi (10. So you can look at to Strutils. Searches the input string for the first occurence of a regular expression. PS You can use a string list for the hash codes by representing the hash codes as strings. ; So if we want to write a code compatible with all versions of Delphi, then it should Description. If SubStr is not found in Str, the function returns 0. Two lists will appear on the screen, i. AnsiIndexStr()/AnsiIndexText() also return the index of the matched Answer: Solve 1: Sometimes we need to know if a string matches a pattern, which is a string with wildcards (for example '?' and '*'). In Delphi XE7 Update 1, when trying to execute this code in a VCL program: You are calling the Decode overload that accepts base64 encoded text and returns a string. You might just be asking how to know the type of a file, where simple ExtractFileExt will suffice and the whole "index of a string" bit is irrelevant. In Delphi code, StringOfChar returns a string that contains Count characters, with the character value given by Ch. TRegEx. These strings are somewhat regular, but there's a few different general forms and several exceptions. matches := regexpr. // Not sure what to write here In Delphi 10. We use it download images in a web page. Several answers here show Whenever you need a string you can clip-out a string using two pointers and return it as a Delphi string. I want to search the string array with a part of the string example 'gr' and have it return all the text that has gr in it. gültekin gültekin. Replace; Code Examples. Change lower case characters in a string to upper case Procedure : Val : Converts number strings to integer and floating point values Function : WideCharToString : Copies a null terminated WideChar string to a normal string Function : WrapText : Add line It looks like you're keeping garbage data in your wide string after the meaningful part, in your update, Length(aMessage) returns 40, while your source string's length is 32. Matching-like, -ilike, -clike - string matches wildcard pattern-notlike, -inotlike, -cnotlike - string doesn't match wildcard pattern-match, -imatch, -cmatch - string matches regex pattern-notmatch, -inotmatch, -cnotmatch - string doesn't match regex pattern; Replacement-replace, -ireplace, -creplace - replaces strings matching a regex pattern How would I go about extracting text between 2 html tags using delphi? Here is an example string. Delphi TRegEx Replace. It returns true if at least one of the strings in the array A question mark matches a single arbitrary character. – LU RD. More efficient, but also more coding. Programming tips, downloads, forums, news, topsites, newsletter whats new ¦ programming tips ¦ indy articles ¦ intraweb articles ¦ informations ¦ links ¦ interviews Consequently, if Duplicates is set to dupAccept, the result will not always be the first string matching the parameter S. But you might wish to know how to get 5 from the input stack. TCompareOption coLingIgnoreCase or coDigitAsNumbers is set. Positions beginning at 1. It is actually built by the DevExpress TcxDBFilterControl. Returns whether this 0-based string ends with the given Value substring. String in old versions of Delphi is AnsiString (1-byte per char) and WideString in new versions (2-bytes per char). Ask Question Asked 10 years, 8 months ago. If you want to match strings which have letters cat followed by mat, you can try: cat. Using Regex to replace string in Delphi. However, if I Ctrl-F I am seeing (current unit) 31 matches found in dark green down in the "search bar" and if I scroll through the unit, I am seeing the matches (highlighted in orange). For a case insensitive comparison, use the IndexText routine. I want to compare both lists and then create a string of what is missing. Related commands Description. http://LearnDelphi. tv Alister Christie is Description. Ideally my UnicodeStringToString(string, codePage) function (which returns an AnsiString) could set the CodePage inside the string to match the actual code-page using something like SetCodePage: @RemyLebeau-TeamB Main bottleneck of AnsiStartsStr is not the internal copy use, but use of AnsiSameStr which calls the very slow CompareString Windows API. If any match, true is found, otherwise false is returned. Commented Jul 9, 2015 at 23:52. Returns the position of the first match (case significant) for SubStr inside Str. I'm trying to build a set of regexes that will handle the various forms and exceptions; I'll apply them one after another to see if I get a match. I have come across a problem of matching a string in an OCR recognized text and find the position of it considering there can be arbitrary tolerance of wrong, missing or extra characters. IndexStr determines if any of the strings in the array AValues match the string specified by AText using a case sensitive comparison. Free; end; This is what I need to achieve. TMatchEvaluator = function (const Match: TMatch): string of object; C++. If Pattern is not present, the regular expression in this TRegEx instance is used. Length specifies the substring, starting at StartPos to match with the There are many such algorithms. Jane,Jack'; // This is the string which i need to be searched with string content boolean containerContainsContent = StringUtils. *$/ Explanation: / charachters delimit the regular expression (i. At the moment it only searches for one string but I would like it to search for alternative strings. For a case sensitive comparison, use the MatchStr routine. For example, Oriental versions of Windows uses multi-byte characters to support their very large set of primitives ('letters'). Michael Kaplan has more details here: Unicode INI function; Unicode INI file? So, you are out of luck with TIniFile. Locate for this, passing a semicolon delimited list of field names and an array of constant field values to match. they are not part of the Regex per se) ^ means match at the beginning of the line. Do you know what Delphi version it appeared in? – Ken extern DELPHI_PACKAGE bool __fastcall AnsiContainsStr (const System:: UnicodeString AText, const System:: UnicodeString ASubText Description. One way might be to set RegEx One of the new Delphi XE features is the RTL support for regular expressions (unit RegularExpressions), regular expressions provide a concise and flexible means for matching strings of text, such as particular characters, words, or patterns of characters. Related. Assuming you want the whole regex to ignore case, you should look for the i flag. IsMatch returns a boolean indicating whether a match is present in the Input string. Here 3 strings match, but we know that we only care about strings 0 and 1. The StoredItems are being watched by the OnChange event and whenever you change them (for instance by adding or The user said compare 2 AnsiStrings, all of the answers here involve conversion to Unicode string, even the Ansi compare functions in modern delphi versions convert the ansi strings to strings. Improve this question. When a match is found, its (0 based) index is returned. – Christophe Fardeau. someArray:=TArray<string>. and I thing that regex is an overkill in this case. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Compares a string with a list of strings - returns match index Function : AnsiLeftStr : Extracts characters from the left of a string Function : AnsiMatchStr : Returns true if a string exactly matches one of a list of strings Function : AnsiMidStr : Returns a substring from the middle characters of a string Function : AnsiPos : Find the Description: The AnsiIndexStr function checks to see if any of the strings in StringList exactly match the Source string. There are a couple of problems with your code: You are type-casting your input AnsiString incorrectly to PWideChar, so you are calling the wrong overload of HexToBin(). If the match fails, it returns a TMatch record with the Success property set to nil . Length together with Is the number in the string required to be a number that can be stored by a Delphi numeric type? Nineteen quintillion is a number, but it won't fit in any Delphi integral type. i have create this function in order to allow arabic and english letters and numbers only in a string var Regexs: TRegEx; begin if Regexs. EndsWith is case-sensitive if the first overloaded function is used. Delphi extract numbers from string. The non-static overload of Match() takes an optional starting position and an optional length parameter that you can use to search through only part of the input string. IgnoreCase specifies whether to use case-sensitivity or not. match("G[a-b]. Exchange method Swaps two strings in the list, as identified by their index positions. i m trying to make rename program with delphi and need to know if it s possible to match some specified number of characters from the beginning, using regex. It is a Case sensitive command. The first part of the mask is the mask itself. Typically, this is easy: DataSet. Creating a If the act of replacing an instance of the search string with the replacement happens to create another instance of the search string, it is not searched again. For example: If my string is 'xyz 60', I need It will look for words cat and mat anywhere in the string with mat following cat. Example filter string: ((Name = 'Jim') and (Rep > 1000)) or (Rep > 5000) So there is nested and's and or's. If the Pattern parameter is not present the regular expression used is specified in the TRegEx constructor. Note: In some circumstances, Compare can fail on older versions of Windows (prior to Windows 7). Sven,G. MatchStr determines if any of the strings in the array AValues match the string specified by AText using a case sensitive comparison. Filling in the "Find what" text and clicking the Find Next button selects the first matching string in the Rich Edit control that follows the previous selection. Create; try sl. One hundred-thousandth is a number, but no Delphi numeric type can hold it. MatchStr determines if any of the strings in the array AValues match the string specified by AText using a case sensitive comparison. The following code compares String1, 'STEVE', to String2, 'STEVe'. Here we implement a function that returns True if the string MatchText determines if any of the strings in the array AValues match the string specified by AText using a case insensitive comparison. So this string has length 1 and that single character is a single quote: '''' I have used IndexOf() in order to extract the index of a TStrinList in Delphi 2005. – Description. This way you avoid the overhead of the string structure itself (refcount, No matching needed. *mat This will match both the above example strings. @RonMaupin, See the tag: Delphi 7. Author: Tomas Rutkauskas How to implement string pattern matching with wildcards Answer: There are many times when you need to compare two strings, but want to use wild cards in the match - all last names that begin with 'St', etc. cff, Result should return False PHP has something like that, but not actually that. How to find a string between two begin and end strings in Delphi. It iterates over each character in the string The Match method takes a string and returns a TMatch record with the details of the first match. – jpfollenius. 2) if there is better code please post it. These are denoted by a bracketed numeral appended to the reserved word Delphi doesn't provide a function that does what you want. The follow example shows how to use regexp to validate IP address. the function must return true or false depending if all the elements of the string are equal to an particular char. 'A' and 'a' are different symbols, with different ordinal values, so comparison is case-sensitive, of course. Try something like this: procedure TMyForm. This example uses the TRegEx TMatchEvaluator in a Replace method to implement a complex replacement. SetLength(Str, NewLength) Sets the length of Str to NewLength. MatchesMask returns false if the string does not match the mask. Extract strings using regular expressions in Delphi. From How to replace a string in a regular expression match. The following tables list these routines by Description. You are currently using an Evaluator, that is a object method containing instructions what to replace. Returns a string with a specified number of repeating characters. EndsWith returns whether this string ends with the substring passed through Value. How can I make sure that my regex for matching formulacalls stops after the call is closed, and does not match a complete expression? I get why it matches the whole expression, but I can't find a way to make it stop. Think of the strings as, say, lines of text that represent items of information, ordered from first item to last item. IsMatch('', TRegEx by default does not match empty strings, because it is created with undocumented roNotEmpty option. There are special functions like CompareText for insensitive comparisons. The question would be improved for future readers if the poster edited to make it clear what was being asked. Commented Jun 14, 2011 at 9:28. The latter, despite its name, works on Unicode characters in the Delphi versions where string is UnicodeString. But exist another options like . See Also. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Checking strings with regular expressions. g. Since $ was the last token in the regex, the engine has found a successful match: the last 4 in the string. I need to search the stringlist for all strings found matching a given expression, e. It would also be nice if indexof would match some part of the string I need to check if a regex pattern matches with all the target string. A simple case is something like this: check whether string A matches the criteria defined in string B. Extract string from a text file using 2 delimiters. What I need to do is determine, if a string contains a number or not. Stack Overflow. AnsiStrings functions provide better performance for AnsiString than SysUtils functions, because SysUtils functions convert an AnsiString to a UnicodeString. The AnsiMatchStr function checks to see if any of the strings in StringList exactly match the Source string. By it you can calculate the number of "changes" required to transform one string into another, so that gives you an estimate of how similar the strings are. Notes: In Delphi : Upper case letters > Lower case letters Lower case letters > Numbers Multi-byte character sets are operating system defined. It returns true if at least one of the strings in the This function takes two strings and compares them. 1 1 1 silver badge. *", "i") Check the documentation for your language/platform/tool to find how the matching modes are specified. returns the input string with all matches replaced. Place a TButton and two TEdits on the form. String content = "Jane"; String container = 'A. but will match . Note that StringOfChar returns the same type as ch: either an AnsiString or UnicodeString, so I was missing a recursive solution like that: function CountOccurences(const SubText, Text: string): Integer; var PosRes: Integer; begin // Find the position of SubText in Text PosRes := Pos(SubText, Text); // If SubText is not found, return 0 if PosRes = 0 then Result := 0 else // If SubText is found, add 1 and call CountOccurences recursively // for the remaining The = operator has been known to work correctly in all versions of Delphi. This should be easy, but the position of strings can change. Thanks for any help. Index and Count are integer-type expressions. when using Ascii 7 bit characters, which happens a lot in programming). Call FormatMaskText to apply the mask specified by the EditMask parameter to the text string specified by the Value parameter. I am trying to find a string with MatchText. It is always faster and clearer to work with a 32 bit integer than a string representation of an IP address. In the world of Delphi, leveraging RegExpr can greatly enhance your coding efficiency and simplify complex string operations. you can strip the whitespace beforehand AND save the positions of non-whitespace characters so you can use them later to find out the matched string boundary positions in the original string like the following: Change lower case characters in a string to upper case Procedure : AppendStr : Concatenate one string onto the end of another Function : CompareStr : Compare two strings to see which is greater than the other Function : CompareText : Compare two strings for equality, ignoring case Function : Concat : Concatenates one or more strings into one Description: Returns a substring of a string or a segment of a dynamic array. There are two different ways of doing this in Delphi. Otherwise, -1 is returned. Related The Matches method on TRegEx, the Regular Expression engine in Delphi. I need to get currently selected ComboBox1 value to use it as Floating point variable in my code: t:=t+ComboBox1. This class provides methods and properties for working with regular expressions, such as Match() and Replace() for matching and replacing strings, and Captures() and Groups() for accessing matched groups. For example, S := StringOfChar('A', 10); sets S to the string 'AAAAAAAAAA'. The search continues from the end of the replacement text. Help tells us:. MatchText: MatchText determines if any of the strings in the array AValues match the string specified by AText using a case insensitive comparison. S is an expression of a string or dynamic-array type. StartPos specifies the starting position to start the search. Returns a string formatted using an edit mask. TMatch has no public constructor. I can't claim to be at the head of Value returns the matched string. In Delphi a wide string is COM BSTR compatible, meaning it can hold null characters, a null does not terminate it, it keeps its length at a negative offset of the character data. Modified 4 years, 5 months ago. If you only have two strings (or one constant reference string), it can approached by dynamic programming-based pairwise alignment algorithms such as the Needleman Wunsch algorithm* and related algorithms. I don't really need wildcards. Now that you know that the two strings are not equal, you can debug the program to work out why two things that you believed to be equal are in fact not equal. I have a variety of strings which I need to work with, these contain both letters and numbers , I am trying to extract the numbers (which is the part I need) from the string, the strings would have a Delphi. LoadFromFile(fileName); for line in sl do if Pos('Hello', line)<>0 then begin found := true; break; end; finally sl. Index and Length indicate the position in the input string and the length of the match. Delphi. txt and the specific number is 6 it should match FileNa. Creating a regular expression in Delphi using TRegEx. *$ This says, start the match from the beginning of the string where it cannot start and end with red, green, or blue and match anything else to the end of the string. – Examples abound, including one in the documentation, so I assume the question is really about what values to assign to which properties to get the specific desired output. I am trying to populate a string variable to use in a TQuery. AnsiStrings functions work only with AnsiString, so there is no conversion. Commonly Used Routines for AnsiStrings Try this: /^stop. Since strings at indices 0 and 1 match the "o", put them into the map {0 => 1, 1 => 1}. followed by * means match any character (. Commonly Used Routines for AnsiStrings The following example uses the interposed class of the TComboBox component. For example, given the text to find and replacement strings, Find: {[0-9]}{[a-c]*}, Replace: NUM\1, the string 3abcabc is changed to NUMabcabc. It returns the zero-based index of the first match in the array, or -1 if no match is found. You can use TDataSet. You would have to either: 1) call Pos() on the Text property, which is not efficient if you have a lot of strings. Returns all the matches present in the input string. Selected. FileSearch(const dirName:string); begin //We write our search code here if . (If you still need the "real" Ansi version, use the AnsiStrings unit. Create('One','Two','Three'); if I hadn't caught that one (probably because the name doesn't match what it actually does). So you cannot use strings directly. Instead you must check for matching extension in your code. 3) TRegEx. A well known one is a Levenshtein distance. Match as a return value which represents the first pattern match in a string. Target string '123' should result True; Target string '123' + sLineBreak should result False; The code should looks like the following: You have access to the whole match, captured groups and named captured groups. In Tcl, & all by itself represents the whole regex match, while $ & is a literal dollar sign followed by the whole regex match, and \& is a literal ampersand. Length specifies the substring, You discard important bit of information which is the position of the character in the string. – One of the new Delphi XE features is the RTL support for regular expressions (unit RegularExpressions), regular expressions provide a concise and flexible means for matching strings of text, such as particular characters, words, or patterns of characters. Or -1 if not found. Indicates if a match is present in the input string. It is also the variable that holds the whole regex match in Perl. Commonly Used Routines for AnsiStrings If you want to match some part of the string, Besides the OP does not mention a specific Delphi version. The result should be a best match position, possibly (not necessarily) with length of matching substring. Skip to main content. Length together with StartPos specifies the Matching Anything but Given Strings. My question is about Delphi 7. I've got a stringlist which is loaded from a text file. My only problem is that I still use Delphi 6 (and I will not upgrade in the near future, unless I get a free full blown version from Borland ). The function searches for all instances of the target string in the input string S. ReplaceEx will replace aInputStrall the matches with the result of the AReplaceFunc callback; the callback is called for each match in the input string, and the result of the allback is then used to replace that particular match in the input string. Commonly Used Routines for AnsiStrings In its simplest form, you pass Locate the name of a column to search, a field value to match, and an options flag specifying whether the search is case-insensitive or if it can use partial-key matching. A record containing the results of a single regular expression match. It's mainly used to match patterns on strings. Instead of simple addition, keeping it primitive, one can use expression like hash = hash*P1 + str[i]*P2 + P3; where Pi are some prime numbers. Regular expressions follow a specific language to Description. For example, if the pattern is '[0-9]+':. The way that Decode method is implemented is as follows: The problem is that your decoding does not match the process that originally encoded. 3. ). Period. Note that CompareStr returns a number less than 0 because the value of 'e' is greater than the value of 'E'. It greatly simplifies things like this because you create a regex string, and look for a match. Use StrRScan or AnsiStrRScan, both in the SysUtils unit. The Delphi Case Statement only supports ordinal types. IndexOf returns the index of the first string in the list that matches the parameter passed to it, and returns -1 if the parameter string is not found. the list contains : Hello Help Me Make Longfellow Serenade Make Description. This does support Unicode INI files, but only if those files are encoded as UTF-16. In fact this is sure to yield a huge performance benefit, and you should do this irrespective of any other concerns. build a function which returns a Integer (hash) based on a string; using generics and anonymous methods ( A generic case for strings) using a function which receive an array of strings (Making a case for Strings, the sane way) It returns true if at least one of the strings in the array match, or false if none of the strings match. Hot Network Questions There are several interpretations of your question. Viewed 2k times 4 . Commented Dec 31, 2012 at 19:32. How do I get a single quote in a string variable. Instead you could use TMemIniFile which allows you to specify an encoding in its constructor. If yes, I need only a number from the string, if not I need a whole word from it. The built-in Trim function always trims the same set of characters (whitespace and control characters) from both ends of the input string. The AnsiStrings unit's functions offer the same capabilities as the SysUtils unit's routines. Clicking the button Click displays a Find Dialog to the right of the edit control. But I haven't yet been able coerce the TRegEx class in Delphi XE8 to yield meaningful capture group info for matches. it has no built-in regex support. Locate('Field1;Field2', ['Value1', 'Value2'], [loPartialKey]); However, as you don't know ahead of time how many columns, you'll need to handle the array differently, using You could put all of your queries (v1, volume1, vol1, etc) in an array and then very simply do a for-loop through the array (say using i as your loop control). So let's assume this is possible and the function's name is GetVariableName , then if I pass FirstName to it like this: GetVariableName(FirstName) , it would return "FirstName" as a string. Provided that your file is small enough then you can do it like this: found := false; sl := TStringList. containsIgnoreCase(container, content); // I used to write like this in java. 2) loop through the list manually, calling Pos() on each String. Text; end; To set the value of a TEdit control, you simply The AnsiMatchStr function checks to see if any of the strings in StringList exactly match the Source string. *e' not found popup. What is your name? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company To use regular expressions in Delphi, you can use the TRegEx class from the System. To locate a string in a string list, use the IndexOf method. This always creates a new string object, fills it from the old Str object and points Str to it. The conclusion to draw is that if the body of your if does not execute, then the two strings are not equal. pdf. blah blah blah<tag>text I want to keep</tag>blah blah blah and I want to extract this The AnsiIndexStr function checks to see if any of the strings in StringList exactly match the Source string. class function Compare (const StrA: For example, failure can result if a string contains a hyphen ("-"), or if the System. so i need to know: 1) how can i search and find any part of the string? for example if in column 2 i have this subitem: "Hello Tek Tips", if i search "llo" it should pick up the subitem. 5. Regular expressions, commonly known as RegExpr, are powerful tools for pattern matching and manipulating strings. Returns the substring starting at the position StartIndex and optionally ending at the position StartIndex + Length, if specified, from this 0-based string. TMatch is also the return type of NextMatch. It's certainly easiest to load the entire file into memory. – zig. It returns true if at least one of the strings in the array match, or false if none of the strings match. Such string is there evaluated to True because of that missing bracket. Now search consume the next char in the input string, "e" and loo it up in the table. Strings are compared according to the ordinal values that make up the characters that make up the string. Note that IndexOf returns the 0-based index of the string. Procedure type for match replacement. The input string is not modified. Keywords are fuzzy string matching. 11 1 1 silver badge 2 2 bronze badges. Point taken Zathras, some time ago we discussed about PosEx which have been implemented in Delphi 7. It will not match: Therez caterpillar on the mat. \& works in the JGsoft applications, Delphi, and Ruby. When asking a question, please make sure the claims you make are true in the language you know before asking whether they're true in the language you don't. All about Borland Delphi. AnsiContainsStr returns true if the string specified by ASubText appears as a substring of the string specified by This works perfect for middle string matching where both delims are not "" – Nuno Jemaio. The cat slept on the mat in front of the fire. You're missing a closing quotation mark, but even with that added, it won't actually evaluate the isset expression in the string. Escape a single quote in a Delphi string by doubling the single quote. This function does the job but it find matching strings not the exact search strings If StringList have some other and if Search strings are some. 2. This example requires a TRichEdit, a TButton, and a TFindDialog. Matches returns all the matches present in the Input string in the form of a TMatchCollection instance. If the question is about matching filenames, then it shouldn't ask about checking a string; it should be asking about checking a filename. Add a comment | Your Answer Delphi - extract string between tags (duplicate tags) 2. IsMatch? The following cases return false where I would expect to return true: fDoesMatch := TRegEx. In fact, the dollar checks the current character. . The BufSize parameter of HexToBin() specifies the number of bytes the output buffer expects to receive, but you are passing it the For the Replace operation, groups are referred to by a backslash and a number, according to the position in the "Text to find" expression, beginning with 0. IndexOfName method To solve the problem you describe, you'd essentially have to do something like what is done in biological sequence alignment of DNA or protein data. IsMatch (astr, '[ء-ي-A-Z-a-z-0-9 ]+') then begin Result:= True; end else begin Result:= False; end;. – TLama. Groups returns a TGroupCollection record that Yet another way to speed things up is to convert the IP address strings to 32 bit integers. Set the RegEx property to the regular expression that you want to match, and set Replacement to the value you want the matched sequences to be replaced with. Is there a function in the Delphi standard library to search string arrays for a particular value? e. Please don't dismiss it because it isn't full of graphics, scripts, cookies, etc! We are going to create a matching game. This is a very powerful mechanism. e. TMatch is constructed by methods like System. AnsiIndexStr() fonction for use a case of. for example if the string is FileName. ; Delphi supports set of AnsiChar, but doesn't support set of WideChar. Used in the TRegEx Replace method. vksxhn dtmdw wuupw dtzmhdn lybz eoww oghsldk xeum ybfk aoe