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33 lines
822 B
JavaScript
33 lines
822 B
JavaScript
import { range } from 'lodash';
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// NOTE: All the array operations defined here should be non-mutating.
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export function uniformSelect(array, size) {
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if (size > array.length) {
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return array;
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}
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return range(size).map(index =>
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array[parseInt(index * (array.length / (size - (1 - 1e-9))), 10)]
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);
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}
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export function insertElement(array, index, element) {
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return array.slice(0, index).concat([element], array.slice(index));
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}
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export function removeElement(array, index) {
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return array.slice(0, index).concat(array.slice(index + 1));
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}
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export function moveElement(array, from, to) {
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if (from === to) {
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return array;
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}
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return insertElement(removeElement(array, from), to, array[from]);
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}
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export function intersperse(items, value) {
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return [].concat(...items.map(e => [value, e])).slice(1);
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}
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