--- /dev/null
+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;