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Javascript 2021-10-23 04:19:11
Find parent and child from array javascript
var data = [{ depth: 0, id: "f35vz2f" }, { depth: 0, id: "f359354" }, { depth: 1, id: "f35e0b0", parent_id: "f359354" }, { depth: 2, id: "f35ji24", parent_id: "f35e0b0" }, { depth: 2, id: "f... Add solution -
Javascript 2021-10-21 03:33:03
javascript array group by id
function groupByKey(array, key) { return array .reduce((hash, obj) => { if(obj[key] === undefined) return hash; return Object.assign(hash, { [obj[key]]:( hash[obj[key]] || [] ).concat(obj)}) }, {}) } var cars = [{'make':'a... Add solution -
Javascript 2021-10-19 12:43:05
object clone javascript
var student = {name: "Rahul", age: "16", hobby: "football"}; //using ES6 var studentCopy1 = Object.assign({}, student); //using spread syntax var studentCopy2 = {...student}; //Fast cloning with data loss var studentCopy3 =... Add solution -
Javascript 2021-10-18 04:54:04
javascript convert array to object
const names = ['Alex', 'Bob', 'Johny', 'Atta']; // convert array to th object const obj = Object.assign({}, names); // print object console.log(obj); // {0: "Alex", 1: "Bob", 2: "Johny", 3: "Atta"} Add solution -
Javascript 2021-10-16 16:49:11
how to clone an object in javascript
var student = {name: "Rahul", age: "16", hobby: "football"}; //using ES6 var studentCopy1 = Object.assign({}, student); //using spread syntax var studentCopy2 = {...student}; //Fast cloning with data loss var studentCopy3 =... Add solution -
Other 2021-10-11 10:23:07
symbols with object.assign
const o1 = { a: 1 }; const o2 = { [Symbol('foo')]: 2 }; const obj = Object.assign({}, o1, o2); console.log(obj); // { a : 1, [Symbol("foo")]: 2 } (cf. bug 1207182 on Firefox) Object.getOwnPropertySymbols(obj); // [Symbol(foo)] Add solution -
Javascript 2021-10-10 00:15:05
Property does not exist on type
// Solution 1: The Quick Fix // In TypeScript, we can type a function by specifying the parameter types and return types. // Similarly, we need to type our objects, so that TypeScript knows what is and isn’t allowed for our keys and values. // Qui... Add solution