RegexOne - Learn Regular Expressions - Lesson 1: An Introduction, and the ABCs
Time 2020-06-22 14:05:27Web Name: RegexOne - Learn Regular Expressions - Lesson 1: An Introduction, and the ABCs
WebSite: http://www.regexone.com
ID:7868
Keywords:
Expressions,Lesson,Regular,Description:
Regular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even documents. And while there is a lot of theory behind formal languages, the following lessons and examples will explore the more practical uses of regular expressions so that you can use them as quickly as possible.The first thing to recognize when using regular expressions is that everything is essentially a character, and we are writing patterns to match a specific sequence of characters (also knownas a string). Most patterns use normal ASCII, which includes letters, digits, punctuation and other symbols on your keyboard like %#$@!, but unicode characters can also be used to match any type ofinternational text.Below are a couple lines of text, notice how the text changes to highlight the matching characterson each line as you type in the input field below. To continue to the next lesson, you will needto use the new syntax and concept introduced in each lesson to write a pattern that matches all thelines provided.Go ahead and try writing a pattern that matches all three rows, it may be as simple as the commonletters on each line. Solution Try typing the first three characters abc to see them match all the lines. Solve the above task to continue on to the next problem, or read the Solution. Find RegexOne useful? Please consider Donating ($4) via Paypal to support our site.TAGS:Expressions Lesson Regular
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