Nodejs Array Zip zip(callback)

Method Source Code

//Return an array in javascript
Array.prototype.zip = function (callback) {
    callback = callback || function (data) {
        return data;
    }//from  w w w  .j  a  va2  s  .c o  m
    return this.map(callback);
}
//This would allow us to the following:
var arr = [4, 9, 16, 25];
console.log(
    arr.zip(function (data) {
        return Math.sqrt(data, 2);
    }).map(function (n) {
        return n * 2
    })
);

Related

1. zip( fn, array )

   Array.prototype.zip = function( fn, array ) {
       var ret = [];
       for ( var i = 0; i < this.length; ++i ) {
           ret.push( fn( this[ i ], array[ i ] ) );
       return ret;
   };
   Array.cons = function( head, tail ) {
       b = [ head ];
   ...
   

2. zip()

   Array.prototype.zip = function() {
       return this.map((value, index, arr) => {
           return arr.map((val, idx, array) => {
               return val[index];
           });
       });
   };
   

3. zip(arr, selector)

   Array.prototype.zip = function (arr, selector) {
     return this
     .take(Math.min(this.length, arr.length))
     .select(function (t, i) {
       return selector(t, arr[i]);
     });
   };
   

4. zip(callback)

   Array.prototype.zip = function (callback) {
       callback = callback || function (data) {
           return data;
       return this.map(callback);
   

5. zip(left, right, combinerFunction)

   Array.prototype.zip = function(left, right, combinerFunction) {
     var counter;
     var results = [];
     for(counter = 0; counter < Math.min(left.length, right.length); counter++) {
       results.push(combinerFunction(left[counter],right[counter]));
     return results;
   };
   

6. zip(xs, ys, modify)

   Array.zip = function(xs, ys, modify) {
       const result = [];
       for(let i = 0; i < Math.min(xs.length, ys.length); i++) {
           result.push(modify(xs[i], ys[i]));
       return result;