Escape a string: "$(printf '%s' "$string" | sed 's/[.Commands: grep -E, sed -E (old GNU versions: sed -r) I am writing a regular expression checker for QLineEdit and I am using QRegExp.Example: Instead of '\[' you can write \\[ (alternatively: "\[" or "\\[") in Bourne compatible shells like bash but this is another story. The characters which are special in some contexts like ^ special at the beginning of a (sub-)expression can be escaped in all contexts.Īs others wrote: in shell if you do not enclose the expression between single quotes you have to additionally escape the special characters for the shell in the already escaped regex. In all the cases special characters are escaped by backslash \. ![]() split ().There are multiple types of regular expressions and the set of special characters depend on the particular type. GNU grep supports three regular expression syntaxes, Basic, Extended, and Perl-compatible. A pattern consists of operators, constructs literal characters, and meta-characters, which have special meaning. Import .* def woodchuck = "How much wood would a woodchuck chuck if a woodchuck could chuck wood?" def pepper = "Peter Piper picked a peck of pickled peppers" println "= Regular-expression String syntax (/string/) =" def woodRE = /o\w+d/ def piperRE = /\w+r/ assert woodRE instanceof String & piperRE instanceof String assert ( /o\w+d/ = "o\\w+d" ) & ( /\w+r/ = "\\w+r" ) println () println () println "= Pattern (~) operator =" def woodPat = ~ /o\w+d/ def piperPat = ~ piperRE assert woodPat instanceof Pattern & piperPat instanceof Pattern def woodList = woodchuck. A regular expression or regex is a pattern that matches a set of strings. ![]() set aString to current application's class "NSString"'s stringWithString :( "I am a string" ) set matchRange to aString's rangeOfString :( "\\S++$" ) ¬ options :( current application's NSRegularExpressionSearch ) range :( GREP is a powerful tool to search inside files with regular expressions. Use AppleScript version "2.4" - OS X 10.10 (Yosemite) or later use framework "Foundation" - Get the run of non-white-space at the end, if any. The scripts below assume it's known that the strings will consist of just one line. The alternatives at the moment are to use one of the text-editing languages available through the do shell script command (AppleScript's own StandardAdditions OSAX does still work) or to use AppleScriptObjectiveC. (One of Apple's increasingly tight security measures.) They are allowed under very strict conditions as part of an application's own resources and Late Night Software, the developer of Script Debugger, has released a SatimageOSAX application as a stop-gap measure to allow existing Satimage-dependent scripts to be used with minimal editing until they're rewritten to use other commands. ![]() Try find text ".*string$" in "I am a string" with regexp on error message return message end try try change "original" into "modified" in "I am the original string" with regexp on error message return message end tryĪs from macOS 10.14 Mojave, third-party scripting additions (OSAXen) such as the Satimage OSAX are essentially unusable. First - 1 ) & "pattern" & Str ( Last + 1. ![]() Compile ( "(PATTERN)" ), Str, First, Last, Found ) Str := Str ( Str ' First. This identifies a shortest match, which is fine for simple pattern matching as in grep, where all that matters is to find a match as quickly as possible. Str ' Last ), First, Last, Found ) exit when not Found Put_Line ( "" ) Current_First := Last + 1 end loop - second, replace "PATTERN" in Str by "pattern" Search_For_Pattern ( Pat. Compile ( Word_Pattern ), Str ( Current_First. Last end if end Search_For_Pattern Word_Pattern : constant String := "(+)" Str : String := "I love PATTERN matching!" Current_First : Positive := Str ' First First, Last : Positive Found : Boolean begin - first, find all the words in Str loop Search_For_Pattern ( Pat. No_Match ) if Found then First := Result ( 1 ). Match ( Compiled_Expression, Search_In, Result ) Found := not Pat. Pattern_Matcher Search_In : String First, Last : out Positive Found : out Boolean ) is Result : Pat. Returns whether string haystack matches the regular expression pattern in re2. With Ada.Text_IO with Gnat.Regpat use Ada.Text_IO procedure Regex is package Pat renames Gnat.Regpat procedure Search_For_Pattern ( Compiled_Expression : Pat. Function positionUTF8 correctly counts character (represented by two.
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