When this is the case, our regular expression will match all occurrences of the string "test", even if it exists in larger sets of characters like "retest" or "testing". In the previous examples, our pattern was a specific set of characters, like /test/. Regular expression patterns are a language specifically designed for pattern definition. It’s the ability to match patterns of various types which makes regular expressions so rich and powerful. More so, regular expression patterns can be combined to match just about any conceivable pattern.
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