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Re: Nasty language semantics (Was: error message I don understand) [message #174915 is a reply to message #174914] Sun, 17 July 2011 20:21 Go to previous messageGo to previous message
The Natural Philosoph is currently offline  The Natural Philosoph
Messages: 993
Registered: September 2010
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Robert Heller wrote:
> At Sun, 17 Jul 2011 20:50:23 +0100 The Natural Philosopher <tnp(at)invalid(dot)invalid> wrote:
>
>> Tim Streater wrote:
>>> In article <ivv775$egh$1(at)dont-email(dot)me>,
>>> August Karlstrom <fusionfile(at)gmail(dot)com> wrote:
>>>
>>>> On 2011-07-17 18:31, Peter H. Coffin wrote:
>>>> > On Sun, 17 Jul 2011 16:50:28 +0200, August Karlstrom wrote:
>>>> >
>>>> >> On 2011-07-17 15:03, Jerry Stuckle wrote:
>>>> >>
>>>> >>> This isn't mathematics - it is programming, as people have told you
>>>> >>> before. If you want mathematics, get a chalkboard.
>>>> >> Don't be silly. There are several programming languages in which `='
>>>> >> denote (surprise) equality.
>>>> > Very few that use it alone.
>>>> Pascal, Modula-2, Eiffel and Ada all use `=' for equality and `:=' for
>>>> assignment.
>>> A good enough reason not to use these languages.
>>>
>> The chief reason I gave up on Pascal after spending 4 hours trying to
>> make a variable length bitfield containing potentially different sorts
>> of entities depending on what was in the first few bits...into some form
>> of syntax that made it usable, was that in the end rewriting the whole
>> program in C was quicker than trying to make the existing Pascal work.
>>
>> And that's the problem with these academic languages. When you meet a
>> situation never envisaged in the academics brain that created them, you
>> are basically shafted.
>>
>> I don't care what the actual syntax is. AS long as its clear unambiguous
>> and consistent.
>>
>>
>> Since I write assignment more often than comparisons, I slightly prefer
>> a=b as the assignment and a==b as the boolean comparison.
>>
>> Aso why I hate loosely typed languages.
>>
>> I want to know that '1.02' + '3.7' is reliably going to be either '4.72'
>> or '1.023.7', not implementation dependent, as I found in at least one
>> Javascript example.
>
> Javascript's main problem here is using a common numerical operator (+)
> as a string operator as will AND allowing numbers to promoted (or
> demoted) to strings. Javascript *could* have picked a different
> operator for string concatenation, something less likely to cause
> ambigious interpretation.
>
Or they could have defined the language carefully enough so that it was
unambiguous, or allowed for explicit casting to make it so.


>>
>

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