How to get value form Input as numbers to calculate gcd?

Question

I use math.js to calculate gcd for a series of numbers wich are taken from input. Among the tested options I mention:

parseInt() and parseFloat()
IaNr=document.getElementById("nrs").value
math.gcd(nrs.value);
math.gcd($("#nrs").val())
IaNr.toString()

but it doesn't work. what am I missing, because it doesn't calculate the numbers from input. it works when I provide the numbers directly. ex: math.gcd(4, 8, 25,74)

<script src="http://cdnjs.cloudflare.com/ajax/libs/mathjs/1.2.0/math.min.js"></script>  

$(function(){

IaNr=$("#nrs").val()

DoGcd=math.gcd(IaNr)

$("#show").html(DoGcd)
})          

<input id="nrs"  value="14,92,34,78">

<div id="show"></div>

Your question is vague - do you try to pass 12,34,45 to parseInt() for example?, because it won't work. — JMP, Jan 24 '15 at 06:59
i want to pass any set of numbers up to 10, taken form input for which to calculate the gcd — ChrisGP, Jan 24 '15 at 07:01
IaNr will be stored as an Array, so you need to somehow flatten it before passing it to gcd. — JMP, Jan 24 '15 at 07:05
@JonMarkPerry do you have any practical implementation example to take a look at? — ChrisGP, Jan 24 '15 at 07:15
No. It depends on how ajax math requires its arguments, which I don't know offhand. You could try IaNr.toString(). — JMP, Jan 24 '15 at 07:20

score 1 · Answer 1 · answered Jan 24 '15 at 08:10

1

var arr = $("#nrs").val();
var array  = arr.split(',');
for(var i=0 ; i< array.length ;i++){
array[i] = parseInt(array[i]);
}

dogcd = math.gcd(array[0],array[1],array[2],array[3]);
$("#show").html(dogcd);

answered Jan 24 '15 at 08:10

praveenraj

774
1
9
20

thx this ia a partial solution, because in the final version there won't be a fixed set of numbers. In the Input people will be able to insert from 2 up to 10 numbers for which to calculate the gcd. – ChrisGP Jan 24 '15 at 08:17
switch array.length : {make cases for 2 to 10} – JMP Jan 24 '15 at 09:20

Sadikhasan · Answer 2 · 2015-01-24T07:05:58.887

0

IaNr = $.map($("#nrs").val().split(','),
    function(val, idx) { 
         return parseInt(val, 10);
    })

DoGcd=math.gcd(IaNr);

$("#show").html(DoGcd);

Demo

edited Jan 24 '15 at 07:05

answered Jan 24 '15 at 06:57

Sadikhasan

18,365
21
80
122

Check my demo which find GCD. – Sadikhasan Jan 24 '15 at 07:06
it calculates something now, but i don't think it's correct – ChrisGP Jan 24 '15 at 07:12

score 0 · Answer 3 · answered Jan 24 '15 at 16:06

I build on the solution suggested by @praveenraj9:

var arr = $("#nrs").val();
var array  = arr.split(',');
for(var i=0 ; i< array.length ;i++){
array[i] = parseInt(array[i]);
}

and adapted to suit my needs.

 FaL=arr.length;
 if(FaL===2){$("#show").html(math.gcd(ar[0],ar[1]))};
 if(FaL===3){$("#show").html(math.gcd(ar[0],ar[1],ar[2]))}
 etc

if anyoane knows a more elegant / shorter solution I welcome it.

thx for your help.

How to get value form Input as numbers to calculate gcd?

3 Answers3