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How to empty a file

#file#io
MeerKatDev

MeerKatDev

How to empty a file

Is there a way to empty a file which is not closing and opening with :write?

6 comments
#file#io
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lucaong

lucaong

You can use the Erlang file module function position/2 and truncate/1 to set the position at the beginning of the file and truncate it:

file |> :file.position(:bof) |> :file.truncate()
2
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lucaong

lucaong

Depending on the write mode, you might not need to do anything. If you open the file in :write mode, not combined with read, the file will be truncated upon opening. Otherwise, you could truncate it yourself (tip: check functions in Erlang file if the ones in the Elixir File module are missing what you need)

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