I'm looking for a simple regular expression to match same character in the string more than two times likes following in java script. (Number 1 is three times) 112561

CodePudding user response：

The following regex can be used for this purpose:

.*(.).*\1.*\1.*

CodePudding user response：

This will check if a character is repeated more than 2 times in a string. Note that this also does not use * which is a cause for performance issues in JavaScript.

console.log(/. ?(.)((?:.) ?\1){1,}/.test('abcZdefZghiZ'))
console.log(/. ?(.)((?:.) ?\1){1,}/.test('112561'))
console.log(/. ?(.)((?:.) ?\1){1,}/.test('12561'))

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CodePudding user response：

You could check if a group is more than tow times in the array.

console.log(/(.).*\1.*\1/g.test('12561'));
console.log(/(.).*\1.*\1/g.test('112561'));
console.log(/(.).*\1.*\1/g.test('2125611'));

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