Notes: In Java, by default, case-insensitive matching assumes that only characters in the US-ASCII charset are being matched. The inline version of the modifier looks like (i). The index at which to start the next match. Regular Expressions Regex modifiers (flags) IGNORE CASE modifier Example The common modifier to ignore case is i: /fog/i will match Fog, foG, etc. These properties are own properties of each RegExp instance. Whether or not Unicode features are enabled. Whether or not to search in strings across multiple lines. Whether to ignore case while attempting a match in a string. Whether the regular expression result exposes the start and end indices of captured substrings. Whether to test the regular expression against all possible matches in a string, or only against the first. Ī string that contains the flags of the RegExp object. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide. For RegExp instances, the initial value is the RegExp constructor. This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. without using Regex.IsMatch (testString, regexPattern, RegexOptions. Is there a way to specify in the regexPattern string that the pattern should ignore case (I.e. The constructor function that created the instance object. in pattern I'm using .IsMatch (testString, regexPattern) to do some searches in strings. These properties are defined on RegExp.prototype and shared by all RegExp instances. If pattern is a regex, it would also interrogate pattern's source and flags properties instead of coercing pattern to a string.įor example, () would coerce all inputs to strings, but it would throw if the argument is a regex, because it's only designed to match strings, and using a regex is likely a developer mistake.
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