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Extract file extension: Difference between revisions
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.txt_backup
</pre>
=={{header|Nim}}==
As can be seen in the examples, Nim standard library function <code>splitFile</code> detects that a file such as <code>.desktop</code> is a special file. But, on the other hand, it considers that an underscore is a valid character in an extension.
<lang Nim>import os, strutils
func extractFileExt(path: string): string =
var s: seq[char]
for i in countdown(path.high, 0):
case path[i]
of Letters, Digits:
s.add path[i]
of '.':
s.add '.'
while s.len > 0: result.add s.pop()
return
else:
break
result = ""
for input in ["http://example.com/download.tar.gz", "CharacterModel.3DS",
".desktop", "document", "document.txt_backup", "/etc/pam.d/login"]:
echo "Input: ", input
echo "Extracted extension: ", input.extractFileExt()
echo "Using standard library: ", input.splitFile()[2]
echo()</lang>
{{out}}
<pre>Input: http://example.com/download.tar.gz
Extracted extension: .gz
Using standard library: .gz
Input: CharacterModel.3DS
Extracted extension: .3DS
Using standard library: .3DS
Input: .desktop
Extracted extension: .desktop
Using standard library:
Input: document
Extracted extension:
Using standard library:
Input: document.txt_backup
Extracted extension:
Using standard library: .txt_backup
Input: /etc/pam.d/login
Extracted extension:
Using standard library: </pre>
=={{header|Objeck}}==
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