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Last change
on this file was a762898, checked in by istevanoska <ilinastevanoska@…>, 5 months ago |
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Added visualizations
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File size:
967 bytes
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| [a762898] | 1 | import { identity } from '../../function/identity.mjs';
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| 2 | import { range } from '../../math/range.mjs';
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| 3 | import { isArrayLike } from '../predicate/isArrayLike.mjs';
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| 4 |
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| 5 | function reduce(collection, iteratee = identity, accumulator) {
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| 6 | if (!collection) {
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| 7 | return accumulator;
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| 8 | }
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| 9 | let keys;
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| 10 | let startIndex = 0;
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| 11 | if (isArrayLike(collection)) {
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| 12 | keys = range(0, collection.length);
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| 13 | if (accumulator == null && collection.length > 0) {
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| 14 | accumulator = collection[0];
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| 15 | startIndex += 1;
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| 16 | }
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| 17 | }
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| 18 | else {
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| 19 | keys = Object.keys(collection);
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| 20 | if (accumulator == null) {
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| 21 | accumulator = collection[keys[0]];
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| 22 | startIndex += 1;
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| 23 | }
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| 24 | }
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| 25 | for (let i = startIndex; i < keys.length; i++) {
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| 26 | const key = keys[i];
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| 27 | const value = collection[key];
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| 28 | accumulator = iteratee(accumulator, value, key, collection);
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| 29 | }
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| 30 | return accumulator;
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| 31 | }
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| 32 |
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| 33 | export { reduce };
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