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Multiple file-extensions searchPattern for System.IO.Directory.GetFiles
...uld be AllDirectories or TopDirectoryOnly</param>
/// <returns>Array of FileInfo objects that presents collection of file names that
/// meet given filter</returns>
public string[] getFiles(string SourceFolder, string Filter,
System.IO.SearchOption searchOption)
{
// ArrayList ...
Relationship between SciPy and NumPy
...s the feeling I get about it: NumPy is meant to be a library for numerical arrays, to be used by anybody needing such an object in Python. SciPy is meant to be a library for scientists/engineers, so it aims for more rigourous theorethical mathematics (thus including complex number version of log10 a...
Remove new lines from string and replace with one empty space
... this one, although the code doesn't look as clean:
$string = str_replace(array("\n", "\r"), '', $string);
See it live on ideone
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byte[] to hex string [duplicate]
...But the speed can be improved with algorithms like Nathan Moinvaziri's ByteArrayToHexString or Kurt's ToHex.
I also found it interesting that string.Concat and string.Join are much slower than StringBuilder implementations for long strings, but similar for shorter arrays. Probably due to expanding...
Split string with dot as delimiter
... of text like in a,b,c,, (where delimiter is ,) split at first will create array like ["a" "b" "c" "" ""] but since in most cases we don't really need these trailing empty strings it also removes them automatically for us. So it creates another array without these trailing empty strings and returns ...
Postgresql GROUP_CONCAT equivalent?
...s is probably a good starting point (version 8.4+ only):
SELECT id_field, array_agg(value_field1), array_agg(value_field2)
FROM data_table
GROUP BY id_field
array_agg returns an array, but you can CAST that to text and edit as needed (see clarifications, below).
Prior to version 8.4, you have to...
Convert NSArray to NSString in Objective-C
I am wondering how to convert an NSArray [@"Apple", @"Pear ", 323, @"Orange"] to a string in Objective-C .
9 Answers
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Most efficient way to prepend a value to an array
Assuming I have an array that has a size of N (where N > 0 ), is there a more efficient way of prepending to the array that would not require O(N + 1) steps?
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Checking for empty arrays: count vs empty
This question on ' How to tell if a PHP array is empty ' had me thinking of this question
12 Answers
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Are negative array indexes allowed in C?
... you don't have to dereference the pointer to get UB. Merely computing somearray-2 is undefined unless the result is in the range from the start of somearray to 1 past its end.
– RBerteig
Aug 13 '10 at 9:12
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