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Merge pull request #965 from luc4leone/regex-intro

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Regex: moved and deleted content from the "Patterns and flags".
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Ilya Kantor 2019-05-07 09:18:46 +02:00 • committed by GitHub
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9-regular-expressions/01-regexp-introduction/article.md
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# Patterns and flags # Patterns and flags
Regular expressions is a powerful way of searching and replacing inside a string.
In JavaScript regular expressions are implemented using objects of a built-in `RegExp` class and integrated with strings.
Please note that regular expressions vary between programming languages. In this tutorial we concentrate on JavaScript. Of course there's a lot in common, but they are a somewhat different in Perl, Ruby, PHP etc.
## Regular expressions
A regular expression (also "regexp", or just "reg") consists of a *pattern* and optional *flags*. A regular expression (also "regexp", or just "reg") consists of a *pattern* and optional *flags*.
There are two syntaxes to create a regular expression object. There are two syntaxes to create a regular expression object.

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9-regular-expressions/index.md
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# Regular expressions # Regular expressions
Regular expressions is a powerful way of doing search and replace in strings. Regular expressions is a powerful way of doing search and replace in strings.
In JavaScript regular expressions are implemented using objects of a built-in `RegExp` class and integrated with strings.
Please note that regular expressions vary between programming languages. In this tutorial we concentrate on JavaScript. Of course there's a lot in common, but they are a somewhat different in Perl, Ruby, PHP etc.