Re: [Vala] How to check if string is empty

[Dmitry Golovin <dima golovin in>]

Hi Alexandre,

In Vala you can simply just check for str != "", this is enough.

Regards,
Dmitry

16.01.2017, 21:28, "Alexandre Oliveira" <xinayder airmail cc>:
> I tried this in my method, even replacing 'string' for 'string?', but I
> still get the same message in my terminal.
>
> What is your suggestion to suppress these messages?
>
> On 16/01/2017 17:23, Guillaume Poirier-Morency wrote:
> >  You should test for nullity before addressing the string.
> >
> >      return str == null || str.length == 0;
> >
> >  If you expect the string to be potentially 'null', use the 'string?'
> >  type instead.
> >
> >  2017-01-16 14:09 GMT-05:00 Alexandre Oliveira <xinayder airmail cc
> >  <mailto:xinayder airmail cc>>:
> >
> >      Hello!
> >
> >      I've just heard about Vala and I've been messing around with it these
> >      past days.
> >
> >      However, I came across a problem. I need to check if some strings aren't
> >      empty, and I realized there's no method in Vala that's equivalent to
> >      C#'s `string.IsNullOrEmpty(string)`.
> >
> >      I tried setting up a static method to check if the given string is
> >      empty:
> >      ```
> >      static bool is_empty(string str) {
> >          return str[0] == '\0' || str == null;
> >      }
> >      ```
> >
> >      However, running my code, I get the following message repeatedly in my
> >      terminal: ** (main.exe:2288): CRITICAL **: is_empty: assertion 'str !=
> >      NULL' failed
> >
> >      What am I doing wrong?
> >
> >      Thanks!
> >      --
> >      Alexandre Oliveira
> >        167F D82F 514A E8D1 2E9E
> >        C62D 1B63 9D4A 7E9D DA9D
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> >
> >  --
> >  Guillaume Poirier-Morency <guillaumepoiriermorency gmail com
> >  <mailto:guillaumepoiriermorency gmail com>>
> >
> >  Étudiant au baccalauréat en Informatique à l'Université de Montréal
> >  Développeur d'application web
> >
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>
> --
> Alexandre Oliveira
>   167F D82F 514A E8D1 2E9E
>   C62D 1B63 9D4A 7E9D DA9D
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