Use more for-of

.internal/baseDifference.js

@@ -19,14 +19,12 @@ const LARGE_ARRAY_SIZE = 200
  * @returns {Array} Returns the new array of filtered values.
  */
 function baseDifference(array, values, iteratee, comparator) {
-  let index = -1
   let includes = arrayIncludes
   let isCommon = true
-  const { length } = array
   const result = []
   const valuesLength = values.length
 
-  if (!length) {
+  if (!array.length) {
     return result
   }
   if (iteratee) {
@@ -42,8 +40,7 @@ function baseDifference(array, values, iteratee, comparator) {
     values = new SetCache(values)
   }
   outer:
-  while (++index < length) {
-    let value = array[index]
+  for (let value of array) {
     const computed = iteratee == null ? value : iteratee(value)
 
     value = (comparator || value !== 0) ? value : 0

.internal/baseSum.js

@@ -8,11 +8,9 @@
  */
 function baseSum(array, iteratee) {
   let result
-  let index = -1
-  const { length } = array
 
-  while (++index < length) {
-    const current = iteratee(array[index])
+  for (value of array) {
+    const current = iteratee(value)
     if (current !== undefined) {
       result = result === undefined ? current : (result + current)
     }

.internal/copyObject.js

@@ -15,12 +15,7 @@ function copyObject(source, props, object, customizer) {
   const isNew = !object
   object || (object = {})
 
-  let index = -1
-  const length = props.length
-
-  while (++index < length) {
-    const key = props[index]
-
+  for (const key of props) {
     let newValue = customizer
       ? customizer(object[key], source[key], key, object, source)
       : undefined

cond.js

@@ -38,9 +38,7 @@ function cond(pairs) {
   })
 
   return (...args) => {
-    let index = -1
-    while (++index < length) {
-      const pair = pairs[index]
+    for (const pair of pairs) {
       if (pair[0].apply(this, args)) {
         return pair[1].apply(this, args)
       }

fromPairs.js

@@ -12,12 +12,11 @@
  * // => { 'a': 1, 'b': 2 }
  */
 function fromPairs(pairs) {
-  let index = -1
-  const length = pairs == null ? 0 : pairs.length
   const result = {}
-
-  while (++index < length) {
-    const pair = pairs[index]
+  if (pairs == null) {
+    return result
+  }
+  for (const pair of pairs) {
     result[pair[0]] = pair[1]
   }
   return result

maxBy.js

@@ -19,12 +19,11 @@ import isSymbol from './isSymbol.js'
  */
 function maxBy(array, iteratee) {
   let result
-  let index = -1
-  const length = array == null ? 0 : array.length
-
-  while (++index < length) {
+  if (array == null) {
+    return result
+  }
+  for (const value of array) {
     let computed
-    const value = array[index]
     const current = iteratee(value)
 
     if (current != null && (computed === undefined

minBy.js

@@ -19,12 +19,11 @@ import isSymbol from './isSymbol.js'
  */
 function minBy(array, iteratee) {
   let result
-  let index = -1
-  const length = array == null ? 0 : array.length
-
-  while (++index < length) {
+  if (array == null) {
+    return result
+  }
+  for (const value of array) {
     let computed
-    const value = array[index]
     const current = iteratee(value)
 
     if (current != null && (computed === undefined