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Opposite of %in%: exclude rows with values specified in a vector
...s represented by the letters from A to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in%
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How to enable cURL in PHP / XAMPP
...'re using XAMPP, uncomment the line
;extension=php_curl.dll
in xampp\apache\bin\php.ini, and then restart the Apache service.
NB: In newer XAMPP versions, PHP has moved to root xampp folder xampp\php\php.ini.
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How to index characters in a Golang string?
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Interpreted string literals are character sequences between double quotes "" using the (possibly multi-byte) UTF-8 encoding of individual characters. In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. Strings behav...
Ternary operator is twice as slow as an if-else block?
...on, we'll examine the assembly code produced by the X86 and X64 JITs for each of these cases.
X86, if/then
32: foreach (int i in array)
0000007c 33 D2 xor edx,edx
0000007e 83 7E 04 00 cmp dword ptr [esi+4],0
00000082 7E 1C ...
Unresolved reference issue in PyCharm
...doing this, but there is a simpler method, and that is by simply telling pycharm that you want to add the src folder as a source root, and then adding the sources root to your python path.
This way, you don't have to hard code things into your interpreter's settings:
Add src as a source content r...
Exporting a function in shell
... shell (bash, sh or ksh) so that the function will be available to all the child process launced from the parent process?
6...
What is the dual table in Oracle?
...select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
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Create a folder inside documents folder in iOS apps
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I do that the following way:
NSError *error;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathCompone...
How to represent empty char in Java Character class
I want to represent an empty character in Java as "" in String...
15 Answers
15
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Delete files older than 3 months old in a directory using .NET
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using System.IO;
string[] files = Directory.GetFiles(dirName);
foreach (string file in files)
{
FileInfo fi = new FileInfo(file);
if (fi.LastAccessTime < DateTime.Now.AddMonths(-3))
fi.Delete();
}
shar...