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 objet javascript
var foo = {
'alpha': 'puffin',
'beta': 'beagle'
};
var keys = Object.keys(foo);
console.log(keys) // ['alpha', 'beta']
// (or maybe some other order, keys are unordered).javascript object get value by key
const person = {
name: 'Bob',
age: 47
}
Object.keys(person).forEach((key) => {
console.log(person[key]); // 'Bob', 47
});javascript access property values list of objects
// Access all properties and values in a JS object:
let valuesArray = Object.entries(MyObject);
for (let value of valuesArray) {
document.write(value + "<br>"); // value is the property,value pair
}
/* Result: propName,value
propName,value
...
For clarity: */
let person = {
name: "Piet",
age: 42
};
Object.keys(person) // = ["name", "age"]
Object.values(person) // = ["Piet", 42]
Object.entries(person) // = [ ["name","Piet"], ["age",42] ]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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