how to find the key of an value in an object
function getKeyByValue(object, value) {
return Object.keys(object).find(key => object[key] === value);
}
const map = {"first" : "1", "second" : "2"};
console.log(getKeyByValue(map,"2"));how to find the key of an value in an object
function getKeyByValue(object, value) {
return Object.keys(object).find(key => object[key] === value);
}
const map = {"first" : "1", "second" : "2"};
console.log(getKeyByValue(map,"2"));get keys of dictionary js
// Get keys of a dictionary
let dict = { a:1 , b:2 , c:3 }
console.log( Object.keys(dict) ) // expected output : ['a', 'b', 'c']javascript object entries
// Object Entries returns object as Array of [key,value] Array
const object1 = {
a: 'somestring',
b: 42
}
Object.entries(object1) // Array(2) [["a", "something"], ["b", 42]]
.forEach(([key, value]) => console.log(`${key}: ${value}`))
// "a: somestring"
// "b: 42"javascript object get value by key
const person = {
name: 'Bob',
age: 47
}
Object.keys(person).forEach((key) => {
console.log(person[key]); // 'Bob', 47
});javascript object get value by key
var obj = {
a: "A",
b: "B",
c: "C"
}
console.log(obj.a); // return string : A
var name = "a";
console.log(obj[name]);Copyright © 2021 Codeinu
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