Extract file extension: Difference between revisions

=={{header|Julia}}==

<lang julia># Extract file extension: https://rosettacode.org/wiki/Extract_file_extension

# v0.6

extension(url::String) = try match(r"\.[A-Za-z0-9]+$", url).match catch "" end

@show extension("http://example.com/download.tar.gz")

@show extension("CharacterModel.3DS")

@show extension(".desktop")

@show extension("document")

@show extension("document.txt_backup")

@show extension("/etc/pam.d/login")</lang>

{{out}}

<pre>extension("http://example.com/download.tar.gz") = ".gz"

extension("CharacterModel.3DS") = ".3DS"

extension(".desktop") = ".desktop"

extension("document") = ""

extension("document.txt_backup") = ""

extension("/etc/pam.d/login") = ""</pre>