Cd() directory out of C:\\ or D:\\

General Usage
1

According to Filesystem · The Julia Language
I’d like to

julia> cd("/home/amend")
ERROR: IOError: chdir /home/amend: no such file or directory (ENOENT)

while
julia> cd("D:\\Julia") #working
**Is it a must to start from C:\\ or D:\\ (in Window10)? What if I want to cd directory out of them?

In linux filesystem:
/home/amend #this branch
/mnt/d/ #rather than starting from D:\\ here

The tricks as below fails as well.

julia> cd(D:\\..\\..\\home\\amend")
ERROR: syntax: "\" is not a unary operator
julia> cd("~")
ERROR: IOError: chdir ~: no such file or directory (ENOENT)
2

Use raw"D:\\Julia", as otherwise \\ is interpreted as an escape for a single backslash. Oh, silly me, you want a single backslash here. I can never keep Windows path conventions straight.

You were missing the opening quote. Use cd(raw"D:\..\..\home\Amend")

xkcd 1638

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3

LOL This is why I always use joinpath instead of backslashes. :rofl:

1 Like
4

Xp. But this seems not to work TAT
julia> cd(raw"D:\…“)
julia> cd(raw"D:\…\…”)
julia> pwd()
“D:\”

julia> cd(raw"D:\…\…\home")
ERROR: IOError: chdir D:\…\…\home: no such file or directory (ENOENT)

julia> cd(raw"D:\…\…\home\amend")
ERROR: IOError: chdir D:\…\…\home\amend: no such file or directory (ENOENT)

5

Happy to know more option:)

julia> joinpath("home/amend/ngsJulia/ngsPool", "functions.jl")
"home/amend/ngsJulia/ngsPool/functions.jl"

julia> pwd()
"D:\\Julia"

but it seems not to set home directory or open a file. I guess I didn’t get

  1. what joinpath() should be used for (except termininologies like nodes)
  2. whether it cannot allow path out of mnt as well, if looking at its documentary:

" Join path components into a full path. If some argument is an absolute path or (on Windows) has a drive specification that doesn’t match the drive computed for the join of the preceding paths, then prior components are dropped."

6

joinpath just correctly creates the path string. You should pass it to cd

2 Likes
7

Do you mean .. and not ...?

Since D:\ is a root path, why would D:\.. exist?

joinpath creates a path out of components, e.g. joinpath("D:", "home") makes D:\home

8

The double \ doesn’t show rightly in the post.

image
image3052×219 43 KB

Thanks I get it~
but is there any chance to set /home/amend instead of /mnt/d/anyfile as home directory in julia? This would be helpful to work between linux and julia.

9 
if Sys.iswindows()
    cd(raw"D:\home")
else
    cd("/home/amend")
end
10

Thanks but

julia> cd("/home/amend")
ERROR: IOError: chdir /home/amend: no such file or directory (ENOENT)

help?> iswindows
search:

Couldn't find iswindows
11

Sorry I didn’t remember Sys.iswindows. See here Handling Operating System Variation · The Julia Language

1 Like
12

How does joinpath work when you want to construct the full path? Here is returns C:Users and not C:\\Users.

julia> joinpath("C:", "Users")
"C:Users"

julia> joinpath("C", "Users")
"C\\Users"
1 Like
13

This is discussed in ?joinpath.

1 Like
14

Thank you.

And the missing backslash joinpath("C:\A","c:b") in the help page for joinpath has already been fixed in the new docs.

2 Likes