Nodejs Array Concatenate Map concatMap()

Method Source Code

Array.prototype.concatMap = function() {
   return this.map(function(item) {
         return projectionFunction(item);
      }).concatAll();//from  w  w  w . j a  va2s.c om
      // apply the concatAll function to flatten the two-dimensional array
//      allWords.concatAll();
};

Related

1. concatMap(cb)

   'use strict';
   Array.prototype.concatMap = function (cb) {
       return this.map(cb).concatAll()
   

2. concatMap(f)

   'use strict';
   var j = require('junify');
   Array.prototype.concatMap = function (f) {
     return Array.prototype.concat.apply([], this.map(f));
   };
   j.matchesAny = function (patterns) {
     return function (it) {
       return patterns.some(function (pattern) {
         return  j.unify(pattern, it);
   ...
   

3. concatMap(f)

   'use strict';
   let j = require('junify');
   Array.prototype.concatMap = function (f) {
     return Array.prototype.concat.apply([], this.map(f));
   };
   j.matchesAny = function (patterns) {
     return (it) => patterns.some(pattern => j.unify(pattern, it));
   };
   j.match = function (arg, cases) {
   ...
   

4. concatMap(fn)

   Array.prototype.concatMap = function(fn) {
       return this
           .map((item, index, arr) => fn(index))
           .concatAll();
   };