forgot to delete completed code

Ryan Hamblin · Ryan Hamblin · commit eb789b1c2064 · 2017-07-28T14:14:44.000-06:00
diff --git a/src/arrays.js b/src/arrays.js
@@ -8,17 +8,9 @@ const each = (elements, cb) => {
   // Iterates over a list of elements, yielding each in turn to the `cb` function.
   // This only needs to work with arrays.
   // based off http://underscorejs.org/#each
-  for (let i = 0; i < elements.length; i++) {
-    cb(elements[i], i);
-  }
 };
 
 const map = (elements, cb) => {
-  const myArr = [];
-  each(elements, (el, i) => {
-    myArr.push(cb(el, i));
-  });
-  return myArr;
   // Produces a new array of values by mapping each value in list through a transformation function (iteratee).
   // Return the new array.
 };
@@ -27,48 +19,22 @@ const reduce = (elements, cb, memo = elements.shift()) => {
   // Combine all elements into a single value going from left to right.
   // Elements will be passed one by one into `cb`.
   // `memo` is the starting value.  If `memo` is undefined then make `elements[0]` the initial value.
-  each(elements, (item) => {
-    memo = cb(memo, item);
-  });
-  return memo;
 };
 
 const find = (elements, cb) => {
   // Look through each value in `elements` and pass each element to `cb`.
   // If `cb` returns `true` then return that element.
   // Return `undefined` if no elements pass the truth test.
-  let flag;
-  elements.forEach((element) => {
-    if (cb(element)) flag = element;
-  });
-  return flag;
 };
 
 const filter = (elements, cb) => {
   // Similar to `find` but you will return an array of all elements that passed the truth test
   // Return an empty array if no elements pass the truth test
-  const returnArr = [];
-  elements.forEach((element) => {
-    if (cb(element)) returnArr.push(element);
-  });
-  return returnArr;
 };
 
 const flatten = (elements) => {
   // Flattens a nested array (the nesting can be to any depth).
   // Example: flatten([1, [2], [3, [[4]]]]); => [1, 2, 3, 4];
-  const newArr = [];
-  elements.forEach((element) => {
-    if (Array.isArray(element)) {
-      const nest = flatten(element);
-      nest.forEach((nestedEl) => {
-        newArr.push(nestedEl);
-      });
-    } else {
-      newArr.push(element);
-    }
-  });
-  return newArr;
 };
 
 /* eslint-enable no-unused-vars, max-len */
