String Theory Questions
via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Sun Sep 14 05:07:15 PDT 2014
On Sunday, 14 September 2014 at 09:07:26 UTC, Kagamin wrote:
> On Sunday, 14 September 2014 at 00:34:56 UTC, WhatMeWorry wrote:
>> So is one form (Empty strings versus null strings) considered
>> better than the other? Or does it depend on the context?
>
> For all practical purposes they should be equivalent in D code.
> I suppose the distinction exists because somebody claimed he
> can make sense of it. Some API may rely on distinction between
> null and empty string, like XML DOM, though I don't think such
> interface is very useful.
>
> Also for some reason boolean value of a string is derived from
> ptr instead of length... meh.
Which makes sense given the distinction exists, IMO. Compare for
example with Ruby, where empty strings and `0` integers also
evaluate to true, but only `nil` and `false` evaluated to false.
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