Let's say you have a regex: /^(hello|goodbye)?\s*world$/gi. And you want to test it against the following strings: ... <看更多>

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Some regular expression engines do allow $ to match just before \n if it is the last character in the string, not but JavaScript. > /end$/.test('bend ... ... <看更多>

Both regular expressions are the instances of the RegExp type. They match the string 'hi' . Testing for matching. The RegExp object has many useful methods. One ... ... <看更多>