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Idiom #199 Truncate a file at the current file position

Truncate a file F at the give file position.

F.truncate(F.tell())
using System.IO;
var F = new FileStream("F", FileMode.Open)
// advance into F here
F.SetLength(F.Position);
Truncate(F);
use Path::Tiny qw(path);
my $F = path('F')->openrw;
# ... read some from $F to advance
# position of file handle (not shown) ...
truncate $F, tell $F;
F.truncate(F.pos)

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Idiom created by

Bart