Asir - which

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`which`

which("filename"): :: This returns the path name for the filename which load() will read.

return: path name
filename: filename (path name) or 0

This function searches directory trees according to the same procedure as load() will do. Then, returns a string, the path name to the file if the named file exists; 0 unless otherwise.
For details of searching procedure, refer to the description about load().
On Windows one has to use `/' as the separator of directory names.

[0] which("gr");               
./gb/gr
[1] which("/usr/local/lib/gr");
0
[2] which("/usr/local/lib/asir/gr");
/usr/local/lib/asir/gr

References: section load.

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