Is there any simple way to multiply alphanumeric string in jQuery / JS?
e.g
var str = "ABC";
console.log( str * 5 ); // this will nerutn `Nan`
// where what i want is `ABCABCABCABCABC`
Any suggestion much appreciated.
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I'd go so far as to say definite duplicate. There are some good answers in the older thread.nnnnnn– nnnnnn2011-10-04 12:31:32 +00:00Commented Oct 4, 2011 at 12:31
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1@Dade, use the close link in the post to link to duplicates.epascarello– epascarello2011-10-04 12:35:24 +00:00Commented Oct 4, 2011 at 12:35
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@epascarello It isn't showing a close link.Freesnöw– Freesnöw2011-10-04 12:37:46 +00:00Commented Oct 4, 2011 at 12:37
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@Dade, you need more rep I guess! :)epascarello– epascarello2011-10-04 14:40:29 +00:00Commented Oct 4, 2011 at 14:40
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@epascarello Odd, I see the delete link on all of the other pages though......Freesnöw– Freesnöw2011-10-04 14:52:05 +00:00Commented Oct 4, 2011 at 14:52
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5 Answers
I see the exact question here:
Just add this to your code:
String.prototype.repeat = function( num )
{
return new Array( num + 1 ).join( this );
}
var str = "ABC";
console.log( str.repeat(5) ); // this will return `ABCABCABCABCABC`
2 Comments
Richard Neil Ilagan
this looks way cleaner, and makes for creative use of
Array.join. :D +1!
epascarello
Thread should be closed as a dupe.
Try extending the String object with a prototype function.
String.prototype.repeat = function (n) {
var str = '';
for(var i = 0; i < n; i++) { str += this; }
return str;
};
so that you can do it like this:
console.log(str.repeat(5));
answered Oct 4, 2011 at 12:28
Richard Neil Ilagan
14.8k6 gold badges52 silver badges68 bronze badges
Comments
String.prototype.duplicate = function( numTimes ){
var str = "";
for(var i=0;i<numTimes;i++){
str += this;
}
return str;
};
console.log( "abc".duplicate(2) );
Comments
This returns Nan because str is not a number.
You should do like this :
var str = "ABC";
console.log( multiply(str,num) );
With the function
function multiply(str,num){
for ( var int = 0; int < length; int++) {
str += str;
}
return str
}
Comments
String.prototype.multi = function(num) {
var n=0,ret = "";
while(n++<num) {
ret += this;
}
return ret;
};
And then use .multi(5) on any string you want :) Like:
var s = "ABC";
alert( s.multi(5) );
Comments
