LearningMaterial

Javascript Understanding The Weird Parts

LearningMaterial

for (var i = 0; i < 10; i++) {
  setTimeout(() => {
    console.log(`The number is ${i}`);
  }, 1000);
}

LearningMaterial

    for (var i = 0; i < 10; i++) {
      (function () {
            var currentValueOfI = i;
        setTimeout(() => {
          console.log(`The number is ${currentValueOfI}`);
        }, 1000);
      })();
    }

LearningMaterial

false == "0" // true
// false gets coerced to 0
// "0" gets coerced to 0
// 0 == 0 is true 

false == 0 // true
// false gets coerced to 0
// 0 == 0 is true

LearningMaterial

function calculateBill(total, tax, tip) {
  return total + total * tax + total * tip;
}

var result = calculateBill(100, 0.13, 0.15);
console.log(result);

LearningMaterial

function calculateMyBill(total, tax, tip) {
  return total + total * tax + total * tip;
}

var result = calculateMyBill(100);
console.log(result);

LearningMaterial

function calculateBill(total, tax = 0.13, tip = 0.15) {
  return total + total * tax + total * tip;
}

const result = calculateBill(100);

console.log(result);

LearningMaterial

function addNumber(num1, num2 = 20, num3 = 10) {
  return num1 + num2 + num3;
}

console.log(addNumber(10));
console.log(addNumber(10, 40, 30));

LearningMaterial

const names = ["sakib", "tamim", "Riad"];

const fullNames = names.map(function(name) {
  return `${name}`;
});

console.log(fullNames);

LearningMaterial

const names = ["sakib", "tamim", "Riad"];

const fullNames = names.map(name => {
  return `${name}`;
});

console.log(fullNames);