foreach object javascript
const students = {
adam: {age: 20},
kevin: {age: 22},
};
Object.entries(students).forEach(student => {
// key: student[0]
// value: student[1]
console.log(`Student: ${student[0]} is ${student[1].age} years old`);
});
/* Output:
Student: adam is 20 years old
Student: kevin is 22 years old
*/js loop through object
const obj = { a: 1, b: 2 };
Object.keys(obj).forEach(key => {
console.log("key: ", key);
console.log("Value: ", obj[key]);
} );foreach object js
const object1 = {
a: 'somestring',
b: 42
};
for (let [key, value] of Object.entries(object1)) {
console.log(`${key}: ${value}`);
}
// expected output:
// "a: somestring"
// "b: 42"
// order is not guaranteedjavascript 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)foreach object javascript
const obj = {
a: "aa",
b: "bb",
c: "cc",
};
//This for loop will loop through all keys in the object.
// You can get the value by calling the key on the object with "[]"
for(let key in obj) {
console.log(key);
console.log(obj[key]);
}
//This will return the following:
// a
// aa
// b
// bb
// c
// ccCopyright © 2021 Codeinu
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