How to remove a object from array and push to new array

Question

can someone help me with some code to splice an array and push to new array. I have an arrays

someArray = [{
  name: "Kristian",
  lines: "2,5,10"
}, {
  name: "John",
  lines: "1,19,26,96"
}, {
  name: "Kristian",
  lines: "2,58,160"
}, {
  name: "Felix",
  lines: "1,19,26,96"
}];

i want to splice where name = to Kristian and push to a new array

You should first post code demonstrating your attempt at this. Then we can help you with that code, or show you how it ought to be done — ControlAltDel, Oct 17 '18 at 13:51
[Solution with just `forEach`](https://jsfiddle.net/Lg73hbok/). — Andy, Oct 17 '18 at 14:14

Mamun · Answer 1 · 2018-10-17T14:04:29.797

1

You can use

Array.prototype.filter()

The filter() method creates a new array with all elements that pass the test implemented by the provided function.

Array.prototype.splice()

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

var someArray = [{name:"Kristian", lines:"2,5,10"},{name:"John", lines:"1,19,26,96"},{name:"Kristian", lines:"2,58,160"},{name:"Felix", lines:"1,19,26,96"}];

var res = someArray.filter((p,i) => {
  if(p.name=="Kristian"){
    someArray.splice(i, 1); //remove the mached object from the original array
    return p;
  }
});

console.log(res);
console.log('----------------');
console.log(someArray);

edited Oct 17 '18 at 14:04

answered Oct 17 '18 at 13:51

Mamun

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2

does not remove ... – Nina Scholz Oct 17 '18 at 13:52
@Mamun: i've tried the fliter already the thing is i want to push the removed item to a new array – jack Oct 17 '18 at 13:54
@jack, `res` is indeed a new array.. – Mamun Oct 17 '18 at 13:58

score 1 · Answer 2 · answered Oct 17 '18 at 13:53

You can use .reduce() method along-with .splice():

let data = [
  {name:"Kristian", lines:"2,5,10"}, {name:"John", lines:"1,19,26,96"},
  {name:"Kristian", lines:"2,58,160"}, {name:"Felix", lines:"1,19,26,96"}
];
  
let result = data.reduce((r, c, i, a) => {
  if(c.name = 'Kristian')
    r.push(a.splice(i, 1));
  return r;
}, []);

console.log(result);
console.log(data);

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score 0 · Answer 3 · answered Oct 17 '18 at 13:58

You could use a mixture of filter and map:

const filtered = someArray.filter(obj => obj.name !== "Kristian")
const newArray = someArray.map(obj => obj.name === "Kristian")

Filtered will remove the items whilst map will create a new array with the removed items

How to remove a object from array and push to new array

3 Answers3