make a duplicate array in js

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Brainless answered on November 10, 2020 Popularity 9/10 Helpfulness 2/10

answer make a duplicate array in js

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make a duplicate array in js

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let array =["a","b","c"];
const duplicateArray = [...array];

Popularity 9/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript

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Contributed on Oct 08 2022

Brainless

0 Answers Avg Quality 2/10

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duplicate numbers in an array javascript

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[1, 1, 2, 2, 3].filter((element, index, array) => array.indexOf(element) !== index) // [1, 2]

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Nov 10 2020

Smarty Hearty

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function that duplicates data in array js

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function doubleValues(array) {
  var newArray = [];
  array.forEach(function (el) { newArray.push(el, el); });    
  return newArray;
}

console.log(doubleValues([1,2,3]));

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Source: stackoverflow.com

Tags: function functio

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Contributed on Apr 22 2021

RIP SQL :(

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count duplicate array javascript

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const months = ['april','may','june','may','may','june'];

const countDuplicates = months.reduce((obj,month)=>{
    if(obj[month] == undefined){
        obj[month] = 1;
        return obj;
    }else{
        obj[month]++;
        return obj;
    }
},{});
console.log(countDuplicates);//output:{april: 1, may: 3, june: 2}

Popularity 10/10 Helpfulness 3/10 Language javascript

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Tags: count coun

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Contributed on Sep 06 2022

WinMaw

0 Answers Avg Quality 2/10

js duplicate

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let chars = ['A', 'B', 'A', 'C', 'B'];

let uniqueChars = [];
chars.forEach((c) => {
    if (!uniqueChars.includes(c)) {
        uniqueChars.push(c);
    }
});

console.log(uniqueChars);
Code language: JavaScript (javascript)

Popularity 9/10 Helpfulness 1/10 Language javascript

Source: www.javascripttutorial.net

Tags: javascript j

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Contributed on Oct 31 2022

Raihan Chowdhury

0 Answers Avg Quality 2/10

find duplicates array javascript

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-1

let arr = [1, 7, 8, 9, 10, 20, 33, 0, 20, 7, 1]
console.log([... new Set(arr)]
// Output : [1, 7, 8, 9, 10, 20, 33, 0]

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: find

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Contributed on Oct 23 2021

Wide-eyed Wolf

0 Answers Avg Quality 2/10

make a duplicate array in js

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duplicate numbers in an array javascript

function that duplicates data in array js

count duplicate array javascript

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