Dynamically create js Array filled with certain value [duplicate]

Question

I'm wondering if there is a way to create javascript/jquery array in one-liner to receive something like:

my_array = ['-', '-', ,'-' ,'-']

Idea is that array should be created with dynamic length and all values filled with given value.

Thanks in advance!

Walter Chapilliquen - wZVanG · Accepted Answer · 2015-06-11 08:01:03Z

1

Try:

var total = 4;
var my_array = new Array(total + 1).join("-").split("");

document.write(JSON.stringify(my_array))

.fill Support The native function will be added in (ECMAScript 6), but for now is not available.

if(!Array.prototype.fill){
    Array.prototype.fill = function(val){
        for (var i = 0; i < this.length; i++){
            this[i] = val
        }
        return this
    }
}

var my_array = new Array(4).fill("-"); //returns ["-","-","-","-"]

edited Jun 11, 2015 at 8:01

answered Jun 11, 2015 at 7:34

Walter Chapilliquen - wZVanG

12.1k8 gold badges44 silver badges64 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Mulan Over a year ago

This only works if you want to fill the array with a single character string. Try switching "-" to "abc" to see what I mean.

Walter Chapilliquen - wZVanG Over a year ago

It is why the "downvote" ?. Reason: Question.

suvroc · Accepted Answer · 2016-05-09 10:30:51Z

0

Try to use:

Array.apply(null, new Array(63)).map(String.prototype.valueOf,"-")

edited May 9, 2016 at 10:30

answered Jun 11, 2015 at 7:35

suvroc

3,0621 gold badge17 silver badges29 bronze badges

Collectives™ on Stack Overflow

Dynamically create js Array filled with certain value [duplicate]

2 Answers 2

2 Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Linked

Related