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Re: Nasty language semantics (Was: error message I don understand) [message #174914 is a reply to message #174913] Sun, 17 July 2011 20:17 Go to previous messageGo to previous message
Robert Heller is currently offline  Robert Heller
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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.

>

--
Robert Heller -- 978-544-6933 / heller(at)deepsoft(dot)com
Deepwoods Software -- http://www.deepsoft.com/
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