bicycles | proto | examples | eazy-breezy

preptoHaskellScanL.js

//polyfil map == transformer
Array.prototype.transformer = function (callback) {
  const transformedArr = [];
  for (let i=0; i<this.length; i++) {
    transformedArr.push(callback(this[i],i,this)); 
  }
  return transformedArr;
};

var numbers = [1,2,3,4,5];
const doubleNums = number => number * 2;
var doubles = numbers.transformer(doubleNums);
console.log(doubles);

// reduce polyfil (also simplified | no checking against initValue and restricted arg list)
var treasure = {
  simplify: function(callback, initValue) {
    let accum = initValue; 
    for(let i=0; i<this.length; i++) {
      accum = callback(accum, this[i]);  
    }
    return accum;
  }
};

var list = [1,2,3,4];
//list.__proto__ = treasure;
Object.setPrototypeOf(list,treasure);
console.log( list.simplify((acc,n)=>acc+n, 0 ));