JavaScript simple Array and Object manipulations

JavaScript is Very very fun actually! Look below :D

(1) Removing an element from an array
(2) Adding an element to an array
(3) Replacing an element in an array

    let arr = ['java', 'python', 'ruby'];
    let removing_element = arr.filter(element => element !== 'java')
    console.log(removing_element);

    let adding_element = [...arr, 'javascript']
    console.log(adding_element);

    let replacing_element = arr.map(element=>element === 'java'?'javascript':element)
    console.log(replacing_element);

["python", "ruby"]
["java", "python", "ruby", "javascript"]
["javascript", "python", "ruby"]

(4) Removing an entry in an object
(5) Adding an entry to an object
(6) Updating an entry in an object

let state = {name:'harry', max_pullups:'21'}
let removing_value = {...state, name: undefined} 
console.log(removing_value);

let removing_value = _.omit(state, 'name') //this can be done with lodash!

let adding_new_entry = {...state, age:'99'}
console.log(adding_new_entry);

let updating_entry = {...state, name:'tlonist'}
console.log(updating_entry);

{name: undefined, max_pullups: "21"}
{name: "tlonist", max_pullups: "21"}
{name: "harry", max_pullups: "21", age: "99"}

(7) Iterating keys in object
(8) Iterating values in object
(8) Iterating entries in object

let state = {'name':'alex Delarge', age:22, createdby:'anthony burgess'}

let arr_keys = Object.keys(state)
console.log(arr_keys);

let arr_values = Object.values(state)
console.log(arr_values);

let arr_entry = Object.entries(state)
console.log(arr_entry);

["name", "age", "createdby"]
["alex Delarge", 22, "anthony burgess"]
[Array(2), Array(2), Array(2)]

https://medium.com/@darrion/ways-to-loop-through-an-object-in-javascript-622353049c7f