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