string concatenation in js
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);string concatenation in js
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);how to concatenate in javscript
var one = 'Hello';
var two = 'World';
console.log(one + two);
It will print: HelloWorld
console.log(one + ' ' + two);
It will print: Hello Worldjavascript concatenation
// the fastest way to string concat in cycle when number of string is less than 1e6
// see https://medium.com/@devchache/the-performance-of-javascript-string-concat-e52466ca2b3a
// see https://www.javaer101.com/en/article/2631962.html
function concat(arr) {
let str = '';
for (let i = 0; i < arr.length; i++) {
str += arr[i];
}
return str;
}Copyright © 2021 Codeinu
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