const numbArr = [1,2,3,4];

let total = 0;

​

for (let i = 0; i < numbArr.length; i++) {

  total += numbArr[i];

}

console.log(`For: ${total}`);

// Reset lại Total

total = 0;

​

total = numbArr.reduce((accumalator, currentValue) => {

  console.log(`accumalator: ${accumalator} - currentValue: ${currentValue}`);

  return accumalator + currentValue;

}, 0);

console.log(`Reduce: ${total}`);

​

​

// Tương tác với Array Object

const arrObj = [

  {

    name: 'An Vu'

  },

  {

    job: 'CEO'

  },

  {

    age: 30

  }

];

​

const newObject = arrObj.reduce((accumalator, currentValue) => {

  console.log(accumalator);

  console.log(currentValue);

  return {

    ...accumalator,

    ...currentValue

  };

}, {});

​

console.log(newObject);

​

const obj = {

  name: 'An Vu',

  job: 'CEO',

  age: 30

};

​

const result = Object.keys(obj).reduce((accumalator, key) => {

  console.log(accumalator);

  console.log(key);

  return accumalator += obj[key]; // obj[name]...

}, '');

​

console.log(`Result: ${result}`);