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A Problematic Place
by in CodeSOD on 2018-04-19In programming, sometimes the ordering of your data matters. And sometimes the ordering doesn’t matter and it can be completely random. And sometimes… well, El Dorko found a case where it apparently matters that it doesn’t matter:
DirectoryInfo di = new DirectoryInfo(directory);
FileInfo[] files = di.GetFiles();
DirectoryInfo[] subdirs = di.GetDirectories();
// shuffle subdirs to avoid problematic places
Random rnd = new Random();
for( int i = subdirs.Length - 1; i > 0; i-- )
{
int n = rnd.Next( i + 1 );
DirectoryInfo tmp = subdirs[i];
subdirs[i] = subdirs[n];
subdirs[n] = tmp;
}
foreach (DirectoryInfo dir in subdirs)
{
// process files in directory
}