count string 2

[hunt00]

Is there any way to count string byte...?

 

[adam0101]

var str = "my string";
alert(str.length);

Adam

http://adameslinger.blogspot.com/

 

[hunt00]

thanks... doesnt str.length count character instead of the byte?

 

[adam0101]

Yes, but I think that's as close as you're going to get using JavaScript - unless you can send the string to the server to check it there (maybe using AJAX?).

Adam

http://adameslinger.blogspot.com/

 

[feherke]

Hi

A very ugly workaround which works with a mixture of one and two byte characters.

[blue]>>> s='tek-?????? forums'[/blue]
[red]"tek-?????? forums"[/red]
[blue]>>> s.length[/blue]
[COLOR=#008]17[/color]
[blue]>>> escape(s.replace(/%/g,'.')).replace(/%u..../g,'..').replace(/%../g,'.').length[/blue]
[COLOR=#008]23[/color]

Seems to work in Mozillas, Opera, Safari and Explorer.

Feherke.

http://rootshell.be/~feherke/

 

[adam0101]

That's pretty clever! It might come in handy some day. Have a *

Adam

http://adameslinger.blogspot.com/

 

[hunt00]

Hi, Thanks very much for this one line of code! I am afraid probably will need your explaination to help me understand about it...if possible

Thanks greatly!

 

[feherke]

Hi

First of all, I asked Google Translate about "tips" in Russian. Regarding the FireBug Console, I am sure you guessed that my inputs are displayed in [blue]blue[/blue], while the String results in [red]red[/red]. ( In my previous code the numeric result were in dark blue. ) Beside the Console features I will insert my comments in [COLOR=gray #eee]gray[/color].

[blue]>>> s='tek-?????? forums'[/blue]
[red]"tek-?????? forums"[/red]
[COLOR=gray #eee]// the escape() function URLEncodes the String; this means for characters other than allowed [sup](*)[/sup] are replaced with percent sign ( % ) and their hexadecimal code[/color]
[blue]>>> escape(s)[/blue]
[red]"tek-%u0441%u043E%u0432%u0435%u0442%u044B%20forums"[/red]
[COLOR=gray #eee]// Unicode characters are represented as "%u...." where the 4 dots represents the 4 hexadecimal digits of the 2 byte character code; so we replace all those with 2 regular characters for easier counting[/color]
[blue]>>> escape(s).replace(/%u..../g,'..')[/blue]
[red]"tek-............%20forums"[/red]
[COLOR=gray #eee]// normal but not allowed characters are represented as "%.." where the 2 dots represents the 2 hexadecimal digits of the 1 byte character code; so we replace all those with 1 regular character for easier counting[/color]
[blue]>>> escape(s).replace(/%u..../g,'..').replace(/%../g,'.')[/blue]
[red]"tek-.............forums"[/red]

^(*) - characters allowed in URLEncoded text : upper- and lowercase letters, digits, dash ( - ), underscore ( _ ), period ( . ) and tilde ( ~ ).

Because the character codes are prefixed with percent sign, the percent signs of the original String have to be replaced with any "harmless" character, to avoid messing of the [tt]replace()[/tt]s later. ( I skipped this step in the explanation for keep the code cleaner. )

Note that the order of replacing the character codes is important : first the larger Unicode characters have to be processed.

Feherke.

http://rootshell.be/~feherke/

 

[hunt00]

Thanks so much for the clear explaination, Feherke!! I hope you have a great day!