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Groups > comp.lang.javascript > #15476

Re: radio buttons with. checkbox

From emf <emfril@gmail.com>
Newsgroups comp.lang.javascript
Subject Re: radio buttons with. checkbox
Date 2012-08-21 05:25 -0400
Organization Aioe.org NNTP Server
Message-ID <k0vk0p$pj0$1@speranza.aioe.org> (permalink)
References (2 earlier) <k0qpjr$6s8$1@speranza.aioe.org> <k0r30j$t06$1@speranza.aioe.org> <503226e3$0$6218$ba4acef3@reader.news.orange.fr> <k0tcfo$q8t$1@speranza.aioe.org> <5032459b$0$6216$ba4acef3@reader.news.orange.fr>

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On 2012-08-20 10:11 SAM wrote:
> Le 20/08/12 15:05, emf a écrit :
>>
>> if (using !== undefined) {
>
> if(typeof using != 'undefined') {

Now the file I am editing is

https://files.nyu.edu/emf202/public/js/spherical.html

rather than spherical2.html

I inserted javascript code calling the imputOutput() function in the 
body immediately after the checkbox, so my problem with the null 
elements was solved.
>
> Your code :
>                  if (rads.checked === true) {
> can simply be :
>          if (rads.checked) {
>
>
> The spanCheckbox will be hidden if the radians is checked :
>      spanCheckbox.style.visibility = rads.checked? "hidden" : "";

Yes and yes. You take from me the pleasure of improving the code myself 
at some future point. By writing  (rads.checked === true) I somehow 
wanted to make absolutely sure I wouldn't get some error message, though 
I knew I shouldn't have a used the shorter version.

>
> function inputOutput() {
>     var rads = document.getElementById("rads"),
>         degr = document.getElementById("degr"),
>         dgmn = document.getElementById("dgmn"),
>         spanCheckbox = document.getElementById("degmin");

I'll start adopting this kind of syntax.

>     spanCheckbox.style.visibility = rads.checked? "hidden" : "";
>     using = (typeof using == 'undefined')? ".###°" :
>             rads.checked? 'r' :
>             !dgmn.checked? ".###°" : "#°##.#'";
>     }

I was convinced by Thomas arguments and reverted to making the checkbox 
disabled rather than having it disappear.

Now I do not need an if statement to see if using is undefined.

I do not feel comfortable of using the shorthand syntax above (using = 
...) when it gets more complicated.

> function clearValues() {           // it resets only the text fields
>    var f = document.dataForm.elements,
>        n = f.length;
>    while(n--) if(f[n].type == 'text') f[n].value = '';
> }

Nice! I have to apply this to some other code I have written. Except 
that, again, I feel more comfortable with a simpler for loop. I do not 
find this while(n--) intuitive enough for me.

Thanks,

emf

-- 
Date Calculator with all-purpose JS code
https://files.nyu.edu/emf202/public/js/dateCalculator.html

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Thread

radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-18 10:03 -0400
  Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-18 17:36 +0200
    Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-19 09:30 -0400
      Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-19 12:11 -0400
        Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-20 14:00 +0200
          Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-20 09:05 -0400
            Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-20 16:11 +0200
              Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-21 05:25 -0400
                Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-21 14:36 +0200
                Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-22 12:24 +0200
      Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-20 12:13 +0200
      Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-20 16:27 +0200
        Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-20 21:58 +0200
        Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-21 10:58 -0400
          Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-22 10:41 +0200
          Re: radio buttons with. checkbox "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-08-22 10:14 +0000
          Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-22 14:31 +0200
  Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-18 19:18 +0200
    Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-20 08:29 -0400
      Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-20 16:25 +0200
        Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-21 06:06 -0400
          Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-21 14:33 +0200
            Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-21 10:51 -0400
              Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-22 11:42 +0200
              Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-22 14:27 +0200
            Re: radio buttons with. checkbox Dr J R Stockton <reply1234@merlyn.demon.co.uk.invalid> - 2012-08-22 20:24 +0100
              Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-23 11:06 +0200
                Re: radio buttons with. checkbox Dr J R Stockton <reply1234@merlyn.demon.co.uk.invalid> - 2012-08-25 17:01 +0100
          Re: radio buttons with. checkbox Dr J R Stockton <reply1234@merlyn.demon.co.uk.invalid> - 2012-08-22 19:58 +0100
        Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-22 02:20 -0400
          Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-08-22 10:44 +0200
          Re: radio buttons with. checkbox SAM <stephanemoriaux.NoAdmin@wanadoo.fr.invalid> - 2012-08-22 14:40 +0200
            Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-08-26 00:16 -0400
            Re: radio buttons with. checkbox emf <emfril@gmail.com> - 2012-09-03 07:19 -0400
    Re: radio buttons with. checkbox David Mark <dmark.cinsoft@gmail.com> - 2012-09-03 21:02 -0700
      Re: radio buttons with. checkbox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-04 13:44 +0200
        Re: radio buttons with. checkbox David Mark <dmark.cinsoft@gmail.com> - 2012-09-04 06:00 -0700

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