mrpiglr
190b6b2eab
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37 lines
1 KiB
JavaScript
37 lines
1 KiB
JavaScript
var arrayMap = require('./_arrayMap'),
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baseIteratee = require('./_baseIteratee'),
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basePickBy = require('./_basePickBy'),
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getAllKeysIn = require('./_getAllKeysIn');
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/**
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* Creates an object composed of the `object` properties `predicate` returns
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* truthy for. The predicate is invoked with two arguments: (value, key).
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Object
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* @param {Object} object The source object.
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* @param {Function} [predicate=_.identity] The function invoked per property.
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* @returns {Object} Returns the new object.
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* @example
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*
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* var object = { 'a': 1, 'b': '2', 'c': 3 };
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*
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* _.pickBy(object, _.isNumber);
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* // => { 'a': 1, 'c': 3 }
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*/
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function pickBy(object, predicate) {
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if (object == null) {
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return {};
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}
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var props = arrayMap(getAllKeysIn(object), function(prop) {
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return [prop];
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});
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predicate = baseIteratee(predicate);
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return basePickBy(object, props, function(value, path) {
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return predicate(value, path[0]);
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});
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}
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module.exports = pickBy;
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