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23 lines
673 B
23 lines
673 B
function chunk (array, size = 1) {
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return Array.range(Math.ceil(array.length / size)).map(i => array.slice(i * size, i * size + size));
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}
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function range (start, stop = undefined, step = 1) {
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if (!stop) { stop = start; start = 0; }
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return start < stop ? Array(Math.ceil((stop - start) / step)).fill().map((_, i) => start + i * step) : [];
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}
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function unique (array, op = x => x) {
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return array.filter((obj, i) => array.findIndex(entry => op(obj) === op(entry)) === i);
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}
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function zip (...args) {
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return Array(Math.max(...args.map(arg => arg.length))).fill(null).map((_, i) => args.map(arg => arg[i]));
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}
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module.exports = {
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chunk,
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range,
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unique,
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zip,
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};
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