map-example

map-example.js

/**  input array  */
const arrInput = [1,4,2];

/********* with Array.map  ***************/
const arrMap = arrInput.map(cur=>cur+2);


/********* with for-loop  ****************/
const arrOutput = new Array();
for (var i in arrInput) {
  arrOutput.push(arrInput[i]+2)
}

/**  output  */
console.log("mapped: ", arrMap);
console.log("for-loop: ", arrOutput);

// console output:
// mapped: [3, 6, 4]
// for-loop: [3, 6, 4]