Built-in Mathematica Symbol

StringMatchQ

StringMatchQ["string", patt]
tests whether "string" matches the string pattern patt.

StringMatchQ["string", RegularExpression["regex"]]
tests whether "string" matches the specified regular expression.

StringMatchQ[{s₁, s₂, ...}, p]
gives the list of results for each of the s_i.

StringMatchQ allows both ordinary StringExpression string patterns, as well as abbreviated string patterns containing the following metacharacters:

	*	zero or more characters
	@	one or more characters, excluding uppercase letters
	\\*, etc.	literal *, etc.

Verbatim["p"] specifies the verbatim string "p", with * and @ treated literally.

Setting the option IgnoreCase->True makes StringMatchQ treat lowercase and uppercase letters as equivalent.

Setting the option SpellingCorrection->True makes StringMatchQ allow strings to match even if a small fraction of their characters are different.

Test whether a string pattern matches a particular string:

Use abbreviated string patterns:

Test whether a string pattern matches a particular string:

Use abbreviated string patterns:

Use string patterns:

Use a regular expression:

Use pattern matching for dates:

Mixed regular expressions and string patterns:

StringMatchQ automatically threads over lists of strings:

With IgnoreCase -> True, uppercase and lowercase are treated the same:

The option SpellingCorrection -> True allows automatic spelling correction:

Find all words that contain double letters:

For literal strings, SameQ is equivalent to StringMatchQ:

For fast extraction of elements in a list, use Pick:

Compare to Select:

Use StringFreeQ to check no substring matches a pattern:

StringMatchQ does not work on strings with embedded formatting information:

Spelling correction only works for letter string patterns: