loop over keys in object javascript
Object.keys(obj).forEach(function(key) {
console.log(key, obj[key]);
});loop over keys in object javascript
Object.keys(obj).forEach(function(key) {
console.log(key, obj[key]);
});javascript loop through object
for (var property in object) {
if (object.hasOwnProperty(property)) {
// Do things here
}
}javascript loop through object
Object.entries(obj).forEach(
([key, value]) => console.log(key, value)
);
// Loop using forEach
arr.forEach((item, index) => {
// TODO
})
// Loop using for...of
for (const item of arr) {
await something()
}
// Clone new array (not changing the old one)
const arr = [1,2,3]
const newArray = arr.map(item => item * 2)
console.log(newArray)
// Filter array by condition
const arr = [1,2,3,1]
const newArray = arr.filter(item => {
if (item === 1) { return item }
})
console.log(newArray)
// Join array
const arr1 = [1,2,3]
const arr2 = [4,5,6]
const arr3 = [...arr1, ...arr2]
console.log(arr3)
// Get a property of object
const { email, address } = user
console.log(email, address)
// Copy object/array
const obj = { name: 'my name' }
const clone = { ...obj }
console.log(obj === clone)loop key in object
const fruits = { apple: 28, orange: 17 }
for(key in fruits){
console.log(key)
}javascript iterate over object keys and values
const object1 = {
a: 'somestring',
b: 42
};
for (let [key, value] of Object.entries(object1)) {
console.log(`${key}: ${value}`);
}
// expected output:
// "a: somestring"
// "b: 42"
// order is not guaranteedhow to iterate over keys in object javascript
var p = {
"p1": "value1",
"p2": null,
"p3": "value3"
};
for (var key in p) {
if (p.hasOwnProperty(key)) {
console.log(key + " -> " + p[key]);
}
}Copyright © 2021 Codeinu
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