Regular Expressions and Matching Perl's text processing power comes from its use of regular expressions . A regular expression ( regex or regexp ) is a pattern which describes characteristics of a piece of text.
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#!/bin/bash # substring-extraction.sh String=23skidoo1 # 012345678 Bash # 123456789 awk # Note different string indexing system: # Bash numbers first character of string as '0'.
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Oct 23, 2003 · I urgently require a regular expression for writing names in the text field.The name can contain white space like ex Abu dhabi or New York and it can even be 1 single word like london or mumbai. it can contain some characters like - ' . in it.How to write a regular expression for this.Please help.thanks in advance.
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I'd like to extract 1952971772 and 74% from that string, to use it in a bash script. I know I could use some cut commands or something, but it won't work anymore if a size changes, for example. I also had thoughts about using a regex or something, but I'd like to have the most recommended approach. Thanks in advance!
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Variables · Functions · Interpolation · Brace expansions · Loops · Conditional execution · Command substitution · One-page guide to Bash scripting
Regular Expressions Cheat Sheet from DaveChild. A quick reference guide for regular expressions (regex), including symbols, ranges, grouping, assertions and some sample patterns to get you started.