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Re: JSlint finds for loops intolerable

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ram@zedat.fu-berlin.de (Stefan Ram) writes:

>emf <emfril@gmail.com> writes:
>>for (var i = 0; i < 10; i += 1) {
>>     ...
>>}
>>var i = 0;
>>while (i < 10) {
>>     ...
>>     i += 1;
>>}
>
>  When one compares this, one can see:
>
>  - The for loop is a Statement.
>
>  - The corresponding sequence that uses
>    »while« is a StatementList with /two/
>    StatementListItems.
>
>  So the corresponding statement would be
>
>{ var i = 0; while( i < 10 ){ ... ++i; }}
>
>  . But »...« could be quite long, so it might
>  be hard to see »++i« at the same time as the
>  start of the loop.
>
>  The for loop-head is one »chunk« in the brain.
>  The control of the while loop is distributed
>  in two, or possibly three, different places, 
>  it cannot be seen as a single idiom by the brain.
>
>  While theoretically the while loop /is/ simpler,
>  it might be too low-level. It seems that the for
>  loop comes more naturally to humans. Especially
>  for counting loops and similar loops.
>
>  Due to hoisting »for( var« might be misleeding,
>  so I deem »for( let« more natural.
>

I’m generally sympathetic to the idea that one criterion for judging
programs is how easy they are to reason about.  But there’s often a
glibness about this when it isn’t clear who is doing the reasoning: a
person or a computer program?

/Lew
---
Lew Perin / perin@acm.org
http://babelcarp.org

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JSlint finds for loops intolerable emf <emfril@gmail.com> - 2016-08-28 06:56 -0400
  Re: JSlint finds for loops intolerable "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-08-28 14:28 +0200
    Re: JSlint finds for loops intolerable emf <emfril@gmail.com> - 2016-08-29 22:35 -0400
    Re: JSlint finds for loops intolerable Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-30 12:11 +0200
      Re: JSlint finds for loops intolerable "Christoph M. Becker" <cmbecker69@arcor.de> - 2016-09-03 20:54 +0200
      Re: JSlint finds for loops intolerable Scott Sauyet <scott@sauyet.com> - 2016-09-03 23:03 +0000
    Re: JSlint finds for loops intolerable Scott Sauyet <scott@sauyet.com> - 2016-09-03 22:47 +0000
  Re: JSlint finds for loops intolerable Lewis Perin <perin@panix.com> - 2016-08-28 16:50 -0400
    Re: JSlint finds for loops intolerable Lewis Perin <perin@panix.com> - 2016-08-28 18:49 -0400
      Re: JSlint finds for loops intolerable Lewis Perin <perin@panix.com> - 2016-08-28 19:13 -0400
  Re: JSlint finds for loops intolerable $Bill <news@todbe.com> - 2016-08-28 14:59 -0700

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