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

[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
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>
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-- 
Alexandre Oliveira
  167F D82F 514A E8D1 2E9E
  C62D 1B63 9D4A 7E9D DA9D