Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.javascript > #37087

NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it.

Show all headers | View raw

=?UTF-8?Q?Jonas_Th=C3=B6rnvall?= <jonas.thornvall@gmail.com> wrote on 11
Aug 2019 in comp.lang.javascript: 

> Den söndag 11 augusti 2019 kl. 10:39:32 UTC+2 skrev
> dr.j.r...@gmail.com: 
>> On Sunday, 11 August 2019 00:32:10 UTC+1, Jonas Thörnvall  wrote:
>> 
>> >      if(this.id=="korgvol1") {CCtype=0}
>> >      else if (this.id=="korgvol2") {CCtype=1}
>> >      else if (this.id=="korgvol3") {CCtype=2}
>> >      else if (this.id=="korgvol4") {CCtype=3}
>> >      else if (this.id=="korgvol5") {CCtype=4}
>> >      else if (this.id=="korgvol6") {CCtype=5}
>> >      else if (this.id=="korgvol7") {CCtype=6}
>> >      else if (this.id=="korgvol8") {CCtype=7}
>> >      else if (this.id=="korgvol9") {CCtype=8}
>> >      else if (this.id=="korgvol10") {CCtype=9}
>> >      else if (this.id=="korgvol11") {CCtype=10}
>> >      else if (this.id=="korgvol12") {CCtype=11}
>> >      else if (this.id=="korgvol13") {CCtype=12}
>> >      else if (this.id=="korgvol14") {CCtype=13}
>> >      else if (this.id=="korgvol15") {CCtype=14}
>> >      else if (this.id=="korgvol16") {CCtype=15}
>> 
>> More briefly, something like
>>      CCtype = this.id.substring(7) -1
>> would save keystrokes.
>> 
>> -- 
>>   (c) John Stockton, near London, UK.  Using Google Groups.           |
>>  Mail: J.R.""""""""@physics.org - or as Reply-To, if any.             |
> 
> Yeah you are correct, i was thinking about similar, but then i thought
> it would be abit hard to read. And really i just copy paste lines and
> change a digit or two. 

The computer has no problem with that,
though it is endearing that you care.

If you make the id more conform in length,
like

id = "korgvol002"

then the js is maybe more readable:

CCtype = this.id.replace('korgvol','') - 1;

[the - 1 does an automagic typeconversion to numeric too]

HOWEVER:

you should NEVER use "this" as a variable
in the receiving function:

function korgvol(this) {
   if (this.id=="korgvol2") {CCtype=1}}
};

but:

function korgvol(myThis) {
   if (myThis.id=="korgvol2") {CCtype=1}}
};


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-08 16:50 -0700
  Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-08 16:55 -0700
  Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-09 00:16 -0700
    Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Julio Di Egidio <julio@diegidio.name> - 2019-08-09 00:46 -0700
      Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-10 02:03 -0700
        Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-10 11:12 +0200
      Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-10 02:08 -0700
        Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Julio Di Egidio <julio@diegidio.name> - 2019-08-10 03:14 -0700
          Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-10 16:32 -0700
            Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-10 16:36 -0700
            Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. dr.j.r.stockton@gmail.com - 2019-08-11 01:39 -0700
              Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-11 02:38 -0700
                NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-11 11:58 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-11 12:13 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-11 12:31 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-11 20:15 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-11 17:50 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-11 20:20 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. dr.j.r.stockton@gmail.com - 2019-08-11 13:54 -0700
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-12 08:48 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. dr.j.r.stockton@gmail.com - 2019-08-13 14:43 -0700
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-14 08:43 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-12 12:13 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-12 11:24 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-12 12:14 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-12 12:42 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-12 22:48 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-13 15:06 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-13 15:07 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-13 20:22 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-14 08:47 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-14 10:23 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-08-14 13:45 +0100
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-14 15:10 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-08-15 00:42 +0100
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Julio Di Egidio <julio@diegidio.name> - 2019-08-14 20:51 -0700
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-08-15 14:12 +0100
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-15 09:09 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-08-15 14:11 +0100
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "R.Wieser" <address@not.available> - 2019-08-15 17:34 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Julio Di Egidio <julio@diegidio.name> - 2019-08-19 10:43 -0700
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-14 17:25 +0200
                Re: NEVER use "this" as a variable Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-14 13:10 -0700
            Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Julio Di Egidio <julio@diegidio.name> - 2019-08-12 09:30 -0700
              Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-12 11:55 -0700
                Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-12 11:58 -0700
          Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Jonas Thörnvall <jonas.thornvall@gmail.com> - 2019-08-10 18:48 -0700
            Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-08-11 16:25 +0100
              Extracting numbers from strings, using templates (was: Is the input type ID passed as a parameter onChange? If not how can i achieve it.) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-12 22:10 +0200
                Re: Extracting numbers from strings, using templates (was: Is the input type ID passed as a parameter onChange? If not how can i achieve it.) Jon Ribbens <jon+usenet@unequivocal.eu> - 2019-08-13 00:23 +0000
  Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-09 11:59 +0200
    Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-09 13:54 +0200
      Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-09 14:53 +0200
        Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-09 15:35 +0200
          Re: Is the input type ID passed as a parameter onChange? If not how can i achieve it. Arno Welzel <usenet@arnowelzel.de> - 2019-08-09 17:16 +0200

csiph-web