Javascript shortcut, to append string into all the values of array?

Question

I have an array = ["a", "b", "c"];

What I want is i have an string let us say "Hello", that I want to append to each and every value of this array.

My expected output is something like

["Hello_a", "Hello_b", "Hello_c"]

Is there any shortcut in javascript to perform this operation, without using any loop .

Any help is appreciated !

Thanks

.map(x => 'Hello_' + x) - does it count as a loop?

georg
– georg

2016-03-07 11:53:19 +00:00
Commented Mar 7, 2016 at 11:53 — georg
– georg, Commented Mar 7, 2016 at 11:53

stanleyxu2005 · Accepted Answer · 2016-03-07 12:01:49Z

4

Try to use Array.prototype.map() at this context,

var yourArray = ["a", "b", "c"];
var transformed = yourArray.map(function(item){
  return "Hello_" + item;
});
console.log(transformed); // ["Hello_a", "Hello_b", "Hello_c"]

Also you can use fat Arrow functions if users of you are updated with latest browsers.

var yourArray = ["a", "b", "c"];
var transformed = yourArray.map(item => "Hello_" + item);
console.log(transformed); // ["Hello_a", "Hello_b", "Hello_c"]

As a side note, you have to sure about arrow functions that it will forcibly use lexical this inside of it.

edited Mar 7, 2016 at 12:01

stanleyxu2005

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answered Mar 7, 2016 at 11:53

Rajaprabhu Aravindasamy

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