combine two arrays javascript
let arr1 = [0, 1, 2];
let arr2 = [3, 5, 7];
let primes = arr1.concat(arr2);
// > [0, 1, 2, 3, 5, 7]combine two arrays javascript
let arr1 = [0, 1, 2];
let arr2 = [3, 5, 7];
let primes = arr1.concat(arr2);
// > [0, 1, 2, 3, 5, 7]concat
const array1 = [
{
"id": 2,
"name": "Ijtimoiy hayot",
"user_id": null,
"color": "#230A75"
},
{
"id": 3,
"name": "O'z-o'zini rivojlantirish",
"user_id": null,
"color": "#64E9D8"
}
];
const array2 = [
{
"id": 0,
"name": "Boshqalar",
"user_id": null,
"color": "#95289A"
},
{
"id": 1,
"name": "Oziq - Ovqat",
"user_id": null,
"color": "#26a0fc"
}
];
const array3 = array1.concat(array2);
console.log(array3);
// expected output: Array ["a", "b", "c", "d", "e", "f"]concat
const array1 = ['a', 'b', 'c'];
const array2 = ['d', 'e', 'f'];
const array3 = array1.concat(array2);
console.log(array3);
// expected output: Array ["a", "b", "c", "d", "e", "f"]string concatenation in js
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);javascript string concat vs +
It is strongly recommended to use the string
concatenationoperators (+, +=) instead of String.concat
method for perfomance reasonsconcat js mdn
const array1 = ['a', 'b', 'c'];
const array2 = ['d', 'e', 'f'];
const array3 = array1.concat(array2);
console.log(array3);
// expected output: Array ["a", "b", "c", "d", "e", "f"]Copyright © 2021 Codeinu
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