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What is a regex?

What is a regex? Here are some definitions.

Noun
  1. (computing) Abbreviation of regular expression.
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Stating a regex in terms of what you don't want to match is a bit harder.
Often abbreviated as regex, a regular expression is a string of characters that describes one or more matching strings.
In the « Replace regex » field, we put the path to the local folder from which the images will be selected to be displayed as wallpapers.
Note CRM114 provides language infrastructure to write fuzzy filters with the TRE regex library.
Using a computer syntax called regex, for regular expressions, I had written a filter that recognized any of an infinite number of such patterns.
But see the section below on configuration merging to find out how using regex sections will change how directives are applied.

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