CODEWITHSUNDEEP
julia
NHDaly
NHDaly

Reputation: 8076

julia one-liner to write a tempfile and get its name?

what is the easiest/clearest/simplest/shortest way to A) create a tempfile, B) write a string to it, and C) return the newly created file's name?

This is the best I've got so far:

fname,io = mktemp(); write(io, "<contents>");
# use fname...

Is there some clever, fancy thing I could do with do end? Anyone have a better suggestion? :) Thanks!

Upvotes: 3

Views: 1987

Answers (2)

Gnimuc
Gnimuc

Reputation: 8566

One way is mktemp() .|> (path->path, io->(write(io, "<contents>"); close(io))) |> first(this only need 1 semicolon/"line" for safely close the io). I guess do blocks are mainly for multi-line code:

julia> mktemp() do path,io 
           write(io, "<contents>")
           path
       end
"/var/folders/ft/nd_bm3z52152069y78vb71280000gn/T/tmpKLWTBD"

Oops! the do-block way above automatically removes the temporary file upon completion. Shouldn't this just automatically close the io like open?!

Upvotes: 5

fredrikekre
fredrikekre

Reputation: 10984

You can do

f = tempname()
write(f, "Hello")

which, if a "one-liner" is required, you can put on the same line

f = tempname(); write(f, "Hello")

Upvotes: 8

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