Help me this code! Someone please explain strings!

**helpthiscode** · October 16th, 2009, 02:52 AM

The code
------------------------------------------------

function IsNumber(str)  // (Your explanationHere)
{
   var arrayChars = "0123456789";  // (Your explanationHere)
   var number=true;     // (Your explanationHere)
   var char;     // (Your explanationHere)
 
   for (i = 0; i < str.length && number == true; i++)    // (Your explanationHere)
   { 
      char = str.charAt(i);    // (Your explanationHere)
      if (arrayChars.indexOf(char) == -1)    // (Your explanationHere)
      {
         number = false;  // (Your explanationHere)
      }
   }
 
   return number;   // (Your explanationHere)
}
function length(m1,m2,m3)   // (Your explanationHere)
{
    var result = m1+""+m2+""+m3;   // (Your explanationHere) 
    return result.length;   // (Your explanationHere)
}

-------------------------------------------------

Please replay me fast thanks you all for having your time

**Json** · October 16th, 2009, 02:59 AM

This looks like JavaSCRIPT to me. What kind of explanation would you like for all this? What each row does?

And why do you need this explaining?

// Json

**helpthiscode** · October 16th, 2009, 03:01 AM

Originally Posted by Json

This looks like JavaSCRIPT to me. What kind of explanation would you like for all this? What each row does?

And why do you need this explaining?

// Json

Well I need explanation for every row and if you know what it generates of those 0123456789.
Thanks for any help!

**Json** · October 16th, 2009, 03:08 AM

Basically what happens is you pass a string into the method called IsNumber.

The method loops through every single character in this string and checks it towards the array of numbers "0123456789".

If the character is not in that list it will assume that the string you passed into the method is not a number.

It then returns true or false depending on the result of the loop.

Something to be cautious of with this method though is that it claims to check for numbers but it would say true for a decimal point number.

// Json

**helpthiscode** · October 16th, 2009, 03:13 AM

Thanks you!

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