18 lines
468 B
JavaScript
18 lines
468 B
JavaScript
function shuffle(str) {
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var a = str.split(''), b, c = a.length, d
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while (c) b = Math.random() * c-- | 0, d = a[c], a[c] = a[b], a[b] = d
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return a.join('')
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}
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function isBalanced(str) {
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var a = str, b
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do { b = a, a = a.replace(/\[\]/g, '') } while (a != b)
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return !a
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}
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var M = 20
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while (M-- > 0) {
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var N = Math.random() * 10 | 0, bs = shuffle('['.repeat(N) + ']'.repeat(N))
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console.log('"' + bs + '" is ' + (isBalanced(bs) ? '' : 'un') + 'balanced')
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}
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