Javascript floating point floor rounding

Whenever needing to do Math in computing, you will come across floating point issues. This is the solution I manufactured whilst needing to floor round values to 2 decimal places.

var floorTo = function(val) {   var retVal;   if((""+val).length > 10) {     val = Math.round(val * 10000) / 10000;     val = Math.floor(val * 1000) / 1000;     var d = String(val);     var p = d.split('.');     retVal = d;     if (p[1] && p[1].length == 3) {       retVal = d.substr(0, (d.length-1));     }     return parseFloat(retVal);   }   retVal = Math.floor(val * 100) / 100;   return retVal; }

You're welcome!

Published on Thursday, June 30th, 2011 at 09:44 am by administrator

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