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js add to array if not exists

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Clever Cottonmouth answered on June 13, 2021 Popularity 9/10 Helpfulness 1/10

answer js add to array if not exists

related append to array check if exists javascript

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js add to array if not exists

Comment

const key = 'mDisplayName'
let updatedData = [...new Map(data.map(item => [item[key], item])).values()];
updatedData.map((item)=>{
	console.log(item);
})

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: add javascript not-exists

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Contributed on Sep 17 2022

Clever Cottonmouth

0 Answers Avg Quality 2/10

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append to array check if exists javascript

Comment

var array = ['test1','test2'];
var item = 'test2';

if(array.indexOf(item) === -1) {
    array.push(item);
}
// array = ["test1", "test2"]

if(array.indexOf(item) !== -1) {
    array.push(item);
}
// array = ["test1", "test2", "test2"]

Popularity 9/10 Helpfulness 9/10 Language javascript

Source: Grepper

Tags: append ap

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Contributed on Aug 12 2021

Ashamed Antelope

0 Answers Avg Quality 2/10

js push into array if item exist

Comment

if(this.items.indexOf(item) === -1) {
    this.items.push(item);
    console.log(this.items);
}

Popularity 10/10 Helpfulness 7/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on Jun 13 2021

Colorful Cat

0 Answers Avg Quality 2/10

js add to array if not exists

Comment

-1

var newItem = "NEW_ITEM_TO_ARRAY";
var array = ["OLD_ITEM_1", "OLD_ITEM_2"];

array.indexOf(newItem) === -1 ? array.push(newItem) : console.log("This item already exists");

console.log(array)

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: stackoverflow.com

Tags: add

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Contributed on Aug 05 2021

shahul

0 Answers Avg Quality 2/10

js add to array if not exists

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