Nodejs Array Concatenate Map concatMap(projectionFunctionThatReturnsArray)

Method Source Code

Array.prototype.concatMap = function (projectionFunctionThatReturnsArray) {
  return this.//from   ww w.j a  v  a 2s  .co  m
    map(function (item) {
      return projectionFunctionThatReturnsArray(item);
    }).
    concatAll();
};

Related

1. 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);
   ...
   

2. 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) {
   ...
   

3. concatMap(fn)

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

4. concatMap(modifierFunction)

   Array.prototype.concatMap = function (modifierFunction) {
       return this.map(modifierFunction).concatAll();
   

5. concatMap(projectionFunction)

   Array.prototype.concatMap = function(projectionFunction){
     return this.map(function(item){
       return projectionFunction(item);
     }).concatAll();
   

6. concatMap(projectionFunctionThatReturnsArray)

   Array.prototype.concatMap = function(projectionFunctionThatReturnsArray) {
     return this.
       map(function(item) {
         return this.map((i) => {
           return i;
         }).concatAll();
       }).
       concatAll();
   };
   ...
   

7. concatMap(projectionFunctionThatReturnsArray)

   Array.prototype.concatMap = function(projectionFunctionThatReturnsArray) {
     return this.
       map(function(item) {
         return projectionFunctionThatReturnsArray(item);
       }).
       concatAll();
   };