Javascript String to Int

Comments

1. dav7 says

   May 20, 2007 at 2:05 am

   Wow, thanks for that. First hit in Google and exact result to my problem (“start = parseInt(document.getElementById(‘text’).value);”).

   My function was returning an array with missing values when I tried to access `start – 1′ but as soon as I parseInt’ed it all was well \o/ 😀

   -dav7

2. Scott says

   May 20, 2007 at 7:15 pm

   Perfect, thanks! I was lamenting having to use eval(), so this is perfect!

3. Airor says

   October 5, 2007 at 10:31 am

   Instead I use the built in typecasting
   myInt = 0 + str;
   myStr = ” + i + ‘ number of things.’;

4. Leonardo says

   January 22, 2008 at 1:42 pm

   Nice one,
   tkx

5. johnsmith says

   July 10, 2008 at 1:36 pm

   Ja pierdole ale niemoc pisać tak zjebane artykuły.

   Nice 🙂

6. norma savage says

   July 15, 2008 at 3:40 pm

   thanks!
   🙂

7. Barnaby says

   September 13, 2008 at 8:28 am

   haha, to jest całkiem bez sensu artykuł

   Pretty cool, thanks 🙂

8. Luong Xuan Thuy says

   September 26, 2008 at 2:40 am

   ———————————–
   var yourInt;
   yourInt = parseInt(str);
   ———————————–

   You can not use this code fragment if your string is “009”. parseInt(“099”)=0;
   Because “000” not is a octal digits.

   Thanks.

9. Luong Xuan Thuy says

   September 26, 2008 at 2:40 am

   Sorry, I mean : Because “099″ not is a octal digits.

10. Istvan says

    October 23, 2008 at 4:45 am

    You should always explicitly specify the radix to be safe:

    var yourInt;

    yourInt = parseInt(str,10);

    In this case you won’t have problems with strings that can be interpreted as octal numbers.

    From the javascript specification:

    If the radix parameter is omitted, JavaScript assumes the following:

    If the string begins with “0x”, the radix is 16 (hexadecimal)

    If the string begins with “0”, the radix is 8 (octal). This feature is deprecated

    If the string begins with any other value, the radix is 10 (decimal)

    Not all browsers implement the specification in the same way, so if you want your code to work consistently everywhere you shouldn’t omit the radix.

11. brandonh says

    November 22, 2008 at 2:56 pm

    thank you so much lstvan. i was kicking myself trying to see why 08 was returning 0. you rule.

12. I&Mdesign says

    December 4, 2008 at 9:34 am

    Thanks a lot for your explanation about hexadecimal and octal numbers espesially. It works!