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?
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/
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)
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;
}
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"
var totalplayers = ("0" + totalplayers).slice(-2);But i cant build an array with all the numbers from 00 to totalplayers