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33 lines
715 B
JavaScript
33 lines
715 B
JavaScript
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) {
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stop = start;
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start = 0;
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}
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return start < stop
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? Array(Math.ceil((stop - start) / step))
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.fill()
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.map((_, i) => start + i * step)
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: [];
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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)))
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.fill(null)
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.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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