Answers for "for loop through array js"

Javascript

javascript loop through array

var data = [1, 2, 3, 4, 5, 6];

// traditional for loop
for(let i=0; i<=data.length; i++) {
  console.log(data[i])  // 1 2 3 4 5 6
}

// using for...of
for(let i of data) {
	console.log(i) // 1 2 3 4 5 6
}

// using for...in
for(let i in data) {
  	console.log(i) // Prints indices for array elements
	console.log(data[i]) // 1 2 3 4 5 6
}

// using forEach
data.forEach((i) => {
  console.log(i) // 1 2 3 4 5 6
})
// NOTE ->  forEach method is about 95% slower than the traditional for loop

// using map
data.map((i) => {
  console.log(i) // 1 2 3 4 5 6
})

Posted by: Guest on December-18-2020

loop through an array javascript

let array = ['Item 1', 'Item 2', 'Item 3'];

// Here's 4 different ways
for (let index = 0; index < array.length; index++) {
  console.log(array[index]);
}

for (let index in array) {
  console.log(array[index]);
}

for (let value of array) {
  console.log(value); // Will log value in array
}

array.forEach((value, index) => {
  console.log(index); // Will log each index
  console.log(value); // Will log each value
});

Posted by: Guest on March-25-2020

javascript loop through array

let array = ['Item 1', 'Item 2', 'Item 3'];

for (let item of array) {
  console.log(item);
}

Posted by: Guest on June-01-2020

javascript loop through array

const numbers = [1, 2, 3, 4]
numbers.forEach(number => {
	console.log(number);
}

for (let i = 0; i < number.length; i++) {
	console.log(numbers[i]);
}

Posted by: Guest on September-30-2020

javascript best way to loop through array

var len = arr.length;
while (len--) {
    // blah blah
}

Posted by: Guest on March-25-2020

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