JavaScript зацикливается через объект
for (var property in object) {
if (object.hasOwnProperty(property)) {
// Do things here
}
}
Bald Eagle
for (var property in object) {
if (object.hasOwnProperty(property)) {
// Do things here
}
}
// Looping through arrays created from Object.keys
const keys = Object.keys(fruits)
for (const key of keys) {
console.log(key)
}
// Results:
// apple
// orange
// pear
var p = {
"p1": "value1",
"p2": "value2",
"p3": "value3"
};
// for-in
for (var key in p) {
if (p.hasOwnProperty(key)) {
console.log(key + " -> " + p[key]);
}
}
// for-of with Object.keys()
for (var key of Object.keys(p)) {
console.log(key + " -> " + p[key])
}
// Object.entries()
for (let [key, value] of Object.entries(p)) {
console.log(`${key}: ${value}`);
}var obj = {a: 1, b: 2, c: 3};
for (const prop in obj) {
console.log(`obj.${prop} = ${obj[prop]}`);
}
// Salida:
// "obj.a = 1"
// "obj.b = 2"
// "obj.c = 3"for (const [fruit, count] of entries) {
console.log(`There are ${count} ${fruit}s`)
}
// Result
// There are 28 apples
// There are 17 oranges
// There are 54 pears
const fruits = {
apple: 28,
orange: 17,
pear: 54,
}
const entries = Object.entries(fruits)
console.log(entries)
// [
// [apple, 28],
// [orange, 17],
// [pear, 54]
// ]