Creating files with information

gilbertosj

I have a little doubt,

how do you go about creating and writing a file in the elixir?

Ex:

I intend to create a file with the following information below

my_file.conf

!## My configuration file
Name: test example
Number: 6299999
Ip: 127.0.0.1

Note: Value $ 10000

Note that there are spaces and line breaks.
This my_file.conf file, will need to be created in a specific folder (/var/log/myfile.conf)

I intend that the application itself creates this file.

How do you do that?
Do you use any dependencies for that?

3 comments

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2020-08-23 22:04:52 UTC

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kokolegorille

You can use the File module to do that.

It has read and write functions…

Post #1

gilbertosj

I was thinking of using System.cmd, running an “echo ‘’ > my_file.txt”, but I didn’t like this solution.

I will read more about what you told me.
Thank you

Post #2

pdgonzalez872

Hi @gilbertosj, here is an iex session that may help you:

iex(1)> string = """
...(1)> Hi, gilbertosj! That's a great question.
...(1)> You can use EEx (https://github.com/elixir-lang/elixir/tree/master/lib/eex)
...(1)> EEx is part of the standard library and can help you with your task. 
...(1)> EEx + the File module (as stated above) would solve your problem.
...(1)> Here is an example of a variable: <%= variable %>
...(1)> Here is a lesson about this on ElixirSchool: https://elixirschool.com/en/lessons/specifics/eex 
...(1)> Hope this helps!   
...(1)> """
"Hi, gilbertosj! That's a great question.\nYou can use EEx (https://github.com/elixir-lang/elixir/tree/master/lib/eex)\nEEx is part of the standard library and can help you with your task.\nEEx + the File module (as stated above) would solve your problem.\nHere is an example of a variable: <%= variable %>\nHere is a lesson about this on ElixirSchool: https://elixirschool.com/en/lessons/specifics/eex\nHope this helps!\n"
iex(2)> content = EEx.eval_string(string, [variable: "EXAMPLE VARIABLE"])       
"Hi, gilbertosj! That's a great question.\nYou can use EEx (https://github.com/elixir-lang/elixir/tree/master/lib/eex)\nEEx is part of the standard library and can help you with your task.\nEEx + the File module (as stated above) would solve your problem.\nHere is an example of a variable: EXAMPLE VARIABLE\nHere is a lesson about this on ElixirSchool: https://elixirschool.com/en/lessons/specifics/eex\nHope this helps!\n"
iex(3)> File.write!("this_is_a_filename.txt", content)
:ok

Now, you can check the file we just created:

pdg :> cat this_is_a_filename.txt 
Hi, gilbertosj! That's a great question.
You can use EEx (https://github.com/elixir-lang/elixir/tree/master/lib/eex)
EEx is part of the standard library and can help you with your task.
EEx + the File module (as stated above) would solve your problem.
Here is an example of a variable: EXAMPLE VARIABLE
Here is a lesson about this on ElixirSchool: https://elixirschool.com/en/lessons/specifics/eex
Hope this helps!

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