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<imightbestupid12>
where can i learn how if __FILE__ == $0 works in depth?
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<adam12>
imightbestupid12: What did you want to know about it? __FILE__ is current file, $0 is first argument according to OS, which is usually the file you're executing. If they match (the current file is being executed) the boolean is true.
<imightbestupid12>
OS
<imightbestupid12>
?
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<havenwood>
imightbestupid12: The equality bit is important and easy to look into. See the docs for ==. Try: ri Module.==
<adam12>
Well, I generalized it as the operating system, but it's likely the shell that's calling execve or whatever function in the kernel.
<imightbestupid12>
havenwood: i understand the equality and i understand that __FILE__ is a variable, but i don't get $0 and where it comes from
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<imightbestupid12>
havenwood: that's not helpful =*(
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<havenwood>
imightbestupid12: There are lots of files but only one was used to start the program. That filename gets stored in the global $0 but can be changed.
<imightbestupid12>
i don't understand what an of that stuff on that reference means... is there an eli5 version or something?
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<imightbestupid12>
your explanation is a lot better havenwood :) maybe i'll find that magical resource
<imightbestupid12>
and if i find a magical resource that explains things in a way i understand i'll be sure to share it!
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<zenspider>
azbshiri: a note?
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<tty1>
hey, so im brand new to ruby. Im curious, when I write a library some of the ruby files I write are intended to be "required" into applications that consume it. But other ruby files I write are only intended to be included indirectly (my main ruby file requires it but shouldnt be required directly). Is there some sort of naming convention or directory structure or something that would reflect this. like in javascript its typical to have an index
<tty1>
.js file and in python they use __init__ for that purpose.
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<tty1>
hanmac: wait i think thats different.. isnt that for determining hte entry point of an application? if so thats not exactly what i mean. I'm talking about the part of a library you can include that will include the whole library (require is what i mean by include)
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<hanmac>
ah about that part, checkout require_relative
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<tty1>
hanmac: im familiar with require_relative, use it all the time.. i think you may not be understanding the question.. let me try to rephrase it, maybe that will help
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<tty1>
hanmac: I have 3 ruby files, each one with its own class in it, all in the same module. kiss.rb, kiss_serial.rb, and kiss_tcp.rb .. of these 3 files, the class in kiss has no use being instantiated directly, however kiss_serial and kiss_tcp both extend that class and do make sense being instantiated. Therefore if anyone requires the library then they would want to include kiss_serial and kiss_tcp but don't directly care about kiss. So I'd create
<tty1>
a 4th file called index.rb that includes kiss_serial.rb and kiss_tcp.rb but not kiss.rb. Then any application wishing to consume my library could just type require 'kisslib/index' but this seems cumbersome I'd rather them just be able to do require 'kisslib'
<tty1>
hanmac: but i dont know how to accomplish that
<hanmac>
you do a kisslib.rb which does require the other files in your wanted order
<tty1>
hmm
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<tty1>
so id have a directory and an rb file by the same name?
<tty1>
I'd have kisslib/ and kisslib.rb both in the root folder together
<hanmac>
yeah that works
<tty1>
ok
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<tty1>
hanmac: within the same gem you should always use require_relative and require is reserved for external dependencies?
<hanmac>
normally require_relative for internal, require for external stuff
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<tty1>
hey guys. I have the following line in python `return [ord(c) for c in read_data]` is there some similar and compact way to do this in ruby?
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<catphish>
does anyone happen to know if there's a ruby implementation that could read an ext4 filesystem? i can't find anything, but thought it worth a quick ask
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<apeiros>
it usually consists of a couple of files, containing modules and/or classes
<apeiros>
often packaged as a gem
<apeiros>
module, like classes, is a type of object in ruby and is part of the runtime
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<Jakey3>
if i install rvm as root, then add a user, he user cannot do rvm get head, receive an error Archives path '/usr/local/rvm/archives' not writable, aborting.
<Jakey3>
i want it availible system wide
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<fredolinhares>
Is not secure to let it availabel system wide.
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<MrLocal>
Hello, i try to make a simple web spider. Is ther any gem for a DSL? The user should upload a file with instructions so that the spider take execute this. For Example: Go to www.example.com ; download this file
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<ruby-lang564>
hello friends; anyone have an idea why `Process.clock_gettime(Process::CLOCK_MONOTONIC)` would throw `Errno::EINVAL: Invalid argument` on mac os 10.11?
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<Nilium>
So, not Sierra?
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<Nilium>
Was it a build _for_ Sierra?
<ruby-lang564>
no, the build was for el capitan
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<Nilium>
The syscalls for getting time changed in Sierra, so I'm not sure there.
<ruby-lang564>
i'm attempting to reinstall it right now from source to see if that allows it to define CLOCK_GETTIME
<ruby-lang564>
but i wasn't able to find anyone else with this problem, so I'm wondering what happened :-/
<Nilium>
That said, Ruby should be using libc, so it shouldn't be affected either
<Nilium>
s/syscalls/syscall/
<ruby-lang564>
yea, perhaps it might be easiest to just upgrade this laptop
<ruby-lang564>
welp, reinstalling from source instead of pouring the bottled homebrew install fixed it. i guess the el capitan version had a weird linking error or something
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<matthewd>
The docs do mention Darwin under "Emulations for CLOCK_MONOTONIC:".. maybe it decides which to use at compile time, and El Capitan supports the call natively?
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