12 lines
341 B
JavaScript
12 lines
341 B
JavaScript
const stringPermutations = str => {
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if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
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return str
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.split('')
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.reduce(
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(acc, letter, i) =>
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acc.concat(stringPermutations(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)),
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[]
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);
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};
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module.exports = stringPermutations;
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