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Balancing Parens - How to balance parens using reduce.
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| function balanceParens(string) { | |
| return !string.split('').reduce((previous, char) => { | |
| if (previous < 0) { return previous; } | |
| if (char === '(') { return ++previous; } | |
| if (char === ')') { return --previous; } | |
| return previous; | |
| }, 0); | |
| } | |
| balanceParens(")((())())()("); |
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