Remove redundant reassignments

PR-URL: #425

Author: belochub

lib/array.js

@@ -1,7 +1,5 @@
 'use strict';
 
-const common = require('@metarhia/common');
-
 // Asynchronous map (iterate parallel)
 //   items - <Array>, incoming
 //   fn - <Function>, to be executed for each value in the array
@@ -13,7 +11,6 @@ const common = require('@metarhia/common');
 //     err - <Error> | <null>
 //     result - <Array>
 const map = (items, fn, done) => {
-  done = done || common.emptyness;
   const len = items.length;
   if (!len) {
     done(null, []);
@@ -114,7 +111,6 @@ const asyncMap = (items, fn, options = {}, done) => {
 //     err - <Error> | <null>
 //     result - <Array>
 const filter = (items, fn, done) => {
-  done = done || common.emptyness;
   const len = items.length;
 
   if (!len) {
@@ -172,7 +168,6 @@ const REDUCE_EMPTY_ARR =
 //   initial - <any>, optional value to be used as first
 //       argument in first iteration
 const reduce = (items, fn, done, initial) => {
-  done = done || common.emptyness;
   const len = items.length;
   const hasInitial = typeof initial !== 'undefined';
 
@@ -230,7 +225,6 @@ const REDUCE_RIGHT_EMPTY_ARR =
 //   initial - <any>, optional value to be used as first
 //       argument in first iteration
 const reduceRight = (items, fn, done, initial) => {
-  done = done || common.emptyness;
   const len = items.length;
   const hasInitial = typeof initial !== 'undefined';
 
@@ -277,7 +271,6 @@ const reduceRight = (items, fn, done, initial) => {
 //     err - <Error> | <null>
 //     items - <Array>
 const each = (items, fn, done) => {
-  done = done || common.emptyness;
   const len = items.length;
   if (len === 0) {
     done(null, items);
@@ -312,7 +305,6 @@ const each = (items, fn, done) => {
 //     err - <Error> | <null>
 //     items - <Array>
 const series = (items, fn, done) => {
-  done = done || common.emptyness;
   const len = items.length;
   let i = -1;
 
@@ -344,7 +336,6 @@ const series = (items, fn, done) => {
 //     err - <Error> | <null>
 //     result - <any>
 const find = (items, fn, done) => {
-  done = done || common.emptyness;
   const len = items.length;
   if (len === 0) {
     done();
@@ -384,7 +375,6 @@ const find = (items, fn, done) => {
 //     err - <Error> | <null>
 //     result - <boolean>
 const every = (items, fn, done) => {
-  done = done || common.emptyness;
   if (items.length === 0) {
     done(null, true);
     return;
@@ -417,7 +407,6 @@ const every = (items, fn, done) => {
 //     err - <Error> | <null>
 //     result - <boolean>
 const some = (items, fn, done) => {
-  done = done || common.emptyness;
   const len = items.length;
   let i = 0;