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<dave24>
Does anyone know of a way to get the timezone in pony? GMT offset to be more specific.
<dave24>
Or do I have to do FFI shenanigans
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<vaninwagen>
If you want to get the timezone configured on the machine you are running, you need to do some ffi right now. PosixDate does not have any offset or timezone information
<vaninwagen>
This could be a good addition to the time package
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<felko>
hello, is there a name for the concept of passing the environment to functions to allow them to perform side effects ?
<bougyman>
That doesn't smell right.
<felko>
isn't this what pony does with the `env` variable ?
<SeanTAllen>
felko, what do you mean by "perform side effects?"
<felko>
without a reference to the `env` variable, a function isn't allowed to print anything, neither to read nor write in any files
<SeanTAllen>
the `Env` class provides stdin, stdout, stderr, and the root AmbientAuth. In general, you would only want to supply other actors with the minimum of access they need, so for example, don't pass `env` to everything.
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<SeanTAllen>
felko, that's not quite true, but its also not wrong.
<SeanTAllen>
without Env.out, your can't print to STDOUT
<SeanTAllen>
without Env.err, you can't print to STDERR
<SeanTAllen>
without Env.root, you can't have AmbientAuth
<felko>
sure
<SeanTAllen>
but you dont have to pass the instance of `Env` everywhere. Just a subset of what you need.
<SeanTAllen>
For example if an actor needs to open files, you don't want to give it AmbientAuth, you want to give it the minimal level of capability it needs.
<felko>
so does this approach, that we could name "local" as opposed to the "global" stdout access that we can see in Python or C, has a name ?
<felko>
*have
<SeanTAllen>
its the same access felko
<SeanTAllen>
the difference is that `Env` provides many other things other than just STDOUT, so if all you need is standard out, you should only provide env.out to the particular actor
<felko>
yes i understand the fact that you only pass a subset of env's attributes, but you can access stdout (its an example, I could've taken stdin or stderr or any env attribute) from any context in Python
<felko>
whereas its not possible in pony, without giving the corresponding attribute
<felko>
sorry if i'm not clear
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<SeanTAllen>
stdin is global in Python, there are no globals in Pony.
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