CODEWITHSUNDEEP
javascript
Alex Bogias
Alex Bogias

Reputation: 1880

Making an array with 2 digit numbers in javascript

Let's say that i got a variable which it contains the number 19. I want to make an array from it with the following numbers

var positions = [ "00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19" ];

How is this possible in javascript?

Upvotes: 0

Views: 2806

Answers (4)

KooiInc
KooiInc

Reputation: 122936

Alternatively:

var mynumber = 19,
    myarr = String(Array(mynumber+1))
            .split(',')
            .map(function(el,i){return i<10 ? '0'+i : ''+i;});

For zeropadding you may want to use:

function padLeft(nr,base,chr){
  base = base || 10;
  chr = chr || '0';
  var  len = (String(base).length - String(nr).length)+1;
  return len > 0? Array(len).join(chr)+nr : nr;
}
// usage
padLeft(1);           //=> '01'
padLeft(1,100);       //=> '001'
padLeft(1,10000,'-'); //=> '----1'

Update 2019: in es20xx String.prototype contains a native padStart method:

"1".padStart(2, "0"); //=> "01"
//           ^ max length
//               ^ fill string (or space if omitted)

Upvotes: 2

projektorius96
projektorius96

Reputation: 113

Using this example finally solved my own @@iterator function interface issue; Thanks a lot

var myArray = [];
function getInterval (start, step, end, ommit){
    for (start; start <= end; start += step) {
		myArray.push( start < 10 ? ("" + start.toString()) : start.toString());
		
    }
        				}

getInterval(2, 2, 20, 20);

myArray; // __proto__: Array
// (10) ["2", "4", "6", "8", "10", "12", "14", "16", "18", "20"]
myArray[4]; // "10"

Upvotes: 1

Baz1nga
Baz1nga

Reputation: 15579

essentially you want to pad 0's and the answers here will not suffice and scale when the number is changed.. Probably the better solution would be

function padZero(num, size) {
    var s = num+"";
    while (s.length < size) s = "0" + s;
    return s;
}

Upvotes: 1

Ivan Drinchev
Ivan Drinchev

Reputation: 19581

Something like :

var number = 19;
var arr = [];
for ( i = 0; i <= number ; i++ ) {
   arr.push(i < 10 ? ("0" + i.toString()) : i.toString());
}

demo : http://jsfiddle.net/Kfnnr/1/

Upvotes: 3

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