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var isArrayLike = require('./isArrayLike'),
isIndex = require('./isIndex');
/**
* The base implementation of `_.at` without support for string collections
* and individual key arguments.
*
* @private
* @param {Array|Object} collection The collection to iterate over.
* @param {number[]|string[]} props The property names or indexes of elements to pick.
* @returns {Array} Returns the new array of picked elements.
*/
function baseAt(collection, props) {
var index = -1,
isNil = collection == null,
isArr = !isNil && isArrayLike(collection),
length = isArr ? collection.length : 0,
propsLength = props.length,
result = Array(propsLength);
while(++index < propsLength) {
var key = props[index];
if (isArr) {
result[index] = isIndex(key, length) ? collection[key] : undefined;
} else {
result[index] = isNil ? undefined : collection[key];
}
}
return result;
}
module.exports = baseAt;
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