--- /dev/null
+var baseEach = require('./_baseEach'),
+ isArrayLike = require('./isArrayLike');
+
+/**
+ * The base implementation of `_.map` without support for iteratee shorthands.
+ *
+ * @private
+ * @param {Array|Object} collection The collection to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @returns {Array} Returns the new mapped array.
+ */
+function baseMap(collection, iteratee) {
+ var index = -1,
+ result = isArrayLike(collection) ? Array(collection.length) : [];
+
+ baseEach(collection, function(value, key, collection) {
+ result[++index] = iteratee(value, key, collection);
+ });
+ return result;
+}
+
+module.exports = baseMap;