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Consolidate aggregate modules.

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John-David Dalton
2017-01-11 12:26:35 -08:00
parent 3b4cbc70e7
commit d80077ed94
7 changed files with 36 additions and 93 deletions
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19
countBy.js
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@@ -1,5 +1,5 @@
import baseAssignValue from './.internal/baseAssignValue.js';
import createAggregator from './.internal/createAggregator.js';
import reduce from './reduce.js';
/** Used to check objects for own properties. */
const hasOwnProperty = Object.prototype.hasOwnProperty;
@@ -20,12 +20,15 @@ const hasOwnProperty = Object.prototype.hasOwnProperty;
* countBy([6.1, 4.2, 6.3], Math.floor);
* // => { '4': 1, '6': 2 }
*/
const countBy = createAggregator((result, value, key) => {
if (hasOwnProperty.call(result, key)) {
++result[key];
} else {
baseAssignValue(result, key, 1);
}
});
function countBy(collection, iteratee) {
return reduce(collection, (result, value, key) => {
if (hasOwnProperty.call(result, key)) {
++result[key];
} else {
baseAssignValue(result, key, 1);
}
return result;
}, {});
}
export default countBy;