for of vs for in javascript
let list = [4, 5, 6];
for (let i in list) {
console.log(i); // "0", "1", "2",
}
for (let i of list) {
console.log(i); // "4", "5", "6"
}
// EXAMPLE 2
let pets = new Set(["Cat", "Dog", "Hamster"]);
pets["species"] = "mammals";
for (let pet in pets) {
console.log(pet); // "species"
}
for (let pet of pets) {
console.log(pet); // "Cat", "Dog", "Hamster"
}
3.33
6
for (variable in enumerable) {
// do stuff
}
Thank you!
6
3.33
(6 Votes)
0
3.5
6
void main() {
List subjects = ['Math', 'Biology', 'Economic', 'History', 'Science'];
for (String sName in subjects) {
print(sName);
}
}
Thank you!
6
3.5
(6 Votes)
0
4
4
Object.prototype.objCustom = function () {};
Array.prototype.arrCustom = function () {};
let iterable = [3, 5, 7];
iterable.foo = "hello";
for (let i in iterable) {
console.log(i); // logs 0, 1, 2, "foo", "arrCustom", "objCustom"
}
for (let i of iterable) {
console.log(i); // logs 3, 5, 7
}
Thank you!
4
4
(4 Votes)
0
3.7
10
//for in, iterates keys in an object
var obj={a:1, b:2}
for( var key in obj)
console.log(obj[key]); //would print 1 and 2
//for of, iterates values in array or any iterable
var ar = [10, 11, 12, 13]
for (var item in ar )
console.log(item); //would print 10 11 12 13
Thank you!
10
3.7
(10 Votes)
0
Are there any code examples left?
New code examples in category Javascript
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