Sort Array According to Giving input In Js

Question

I have the array like :

Arr = [{name:"abc",age:1},{name:"a",age:4},{name:"ac",age:3},{name:"abc",age:2},{name:"abc",age:9}]

I want to change it like this:

[{name:"abc",age:1},{name:"abc",age:2},{name:"abc",age:9},{name:"a",age:4},{name:"ac",age:3}]

by sorting or swapping it.

obj with the same name come first or user input name should listed first — ahmed tahir, Feb 26 '20 at 10:58
Use triple backticks around your code to format it in the question. — Josh Wulf, Feb 26 '20 at 11:06

score 0 · Accepted Answer · edited Feb 26 '20 at 18:47

0

try this

arr1.sort((a, b) => {
    if(a.name.startsWith(b.name)) { return -1; }
    if(a.name < b.name) { return -1; }
    if(a.name > b.name) { return 1; }
    return 0;
})

edited Feb 26 '20 at 18:47

Wai Ha Lee

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answered Feb 26 '20 at 11:05

ThomasP1988

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that result is different from the order in comments. – Nina Scholz Feb 26 '20 at 13:31

score 0 · Answer 2 · answered Feb 26 '20 at 11:06

You could collect same named objects with a Map and get the flatted values back.

This approach keeps the given order for name and groups this object with same name together.

var array = [{ name: "abc", age: 1 }, { name: "a", age: 4 }, { name: "ac", age: 3 }, { name: "abc", age: 2 }, { name: "abc", age: 9 }];

array = Array
    .from(array
        .reduce((m, o) => m.set(o.name, [...(m.get(o.name) || []), o]), new Map)
        .values()
    )
    .flat();

console.log(array);

Sort Array According to Giving input In Js

2 Answers2