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NTFS performance and large volumes of files and directories
...erformance(int numFilesInDir, bool testDirs) {
var files = new List<string>();
var dir = Path.GetTempPath() + "\\Sub\\" + Guid.NewGuid() + "\\";
Directory.CreateDirectory(dir);
Console.WriteLine("prepare...");
const string FILE_NAME = "\\file.txt";
for (int i = 0; i <...
How do I check if an index exists on a table field in MySQL?
...name, this way you don't need to find out the index name if it is automatically added without name.
– Programista
Apr 9 '14 at 11:05
...
Creating a “logical exclusive or” operator in Java
...new operators in Java.
Edit: Here's an example:
public static void main(String[] args) {
boolean[] all = { false, true };
for (boolean a : all) {
for (boolean b: all) {
boolean c = a ^ b;
System.out.println(a + " ^ " + b + " = " + c);
}
}
}
Ou...
Is there a way to select sibling nodes?
...ther one of the following should do the trick.
// METHOD A (ARRAY.FILTER, STRING.INDEXOF)
var siblings = function(node, children) {
siblingList = children.filter(function(val) {
return [node].indexOf(val) != -1;
});
return siblingList;
}
// METHOD B (FOR LOOP, IF STATEMENT, ARR...
How to replace a character by a newline in Vim
...s a newline (more precisely, it’s treated as the input CR). Here’s a small, non-interactive example to illustrate this, using the Vim command line feature (in other words, you can copy and paste the following into a terminal to run it). xxd shows a hexdump of the resulting file.
echo bar > te...
Convert SQLITE SQL dump file to POSTGRESQL
...h a sequence to that column so that INSERTs with NULL ids will be automatically assigned the next available value. PostgreSQL will also not recognize AUTOINCREMENT commands, so these need to be removed.
You'll also want to check for datetime columns in the SQLite schema and change them to timestamp ...
Where is the documentation for the values() method of Enum?
...
* Returns the enum constant of this type with the specified
* name.
* The string must match exactly an identifier used to declare
* an enum constant in this type. (Extraneous whitespace
* characters are not permitted.)
*
* @return the enum constant with the specified name
* @throws IllegalArgume...
Github: error cloning my private repository
...ermission denied. Ran "C:\Program Files\Git\git-bash.exe" as administrator and tried again and it worked. Thanks!
– AXO
Dec 26 '15 at 2:49
...
How many bytes does one Unicode character take?
... a programmer a hell when it comes to writing strlen(), substr() and other string manipulation functions on UTF8 arrays. This kind of work will be never complete and always buggy.
– Nulik
Sep 26 '16 at 16:15
...
data.table vs dplyr: can one do something well the other can't or does poorly?
...j and by together is by design. By keeping related operations together, it allows to easily optimise operations for speed and more importantly memory usage, and also provide some powerful features, all while maintaining the consistency in syntax.
1. Speed
Quite a few benchmarks (though mostly on g...