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Use 'class' or 'typename' for template parameters? [duplicate]
...s expected T will always be a class, with "typename" if other types (int, char* whatever) may be expected. Consider it a usage hint.
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Why does this method print 4?
...t execution if you'd prefer-
static int cnt = 0;
public static void main(String[] args) {
try {
main(args);
} catch (Throwable ignore) {
cnt++;
try {
System.out.println(cnt);
} catch (Throwable t) {
}...
What is the difference between HTTP and REST?
...d a header info to every request.
HTTP Methods supported by REST:
GET: /string/someotherstring
It is idempotent and should ideally return the same results every time a call is made
PUT:
Same like GET. Idempotent and is used to update resources.
POST: should contain a url and body
Used for cre...
Referring to the null object in Python
...Empty()
>>> empty==None
True
But then it also works on the empty string
>>> empty==''
True
And yet
>>> ''==None
False
>>> empty is None
False
Case 2: Using None as a boolean
The following two tests
if value:
# Do something
if not value:
# Do something
...
What do (lambda) function closures capture?
...lent way is the one recommended by Adrien Plisson. Create a lambda with an extra argument, and set the extra argument's default value to the object you want preserved.
A little more verbose but less hacky would be to create a new scope each time you create the lambda:
>>> adders = [0,1,2,3...
Is it faster to count down than it is to count up?
...culative instructions will sneak in the "Sub i and N" without incurring an extra cycle -- and -- even the crudest compiler will optimise the the "Sub i and N" out of existence.
– James Anderson
May 13 '10 at 5:47
...
Can code that is valid in both C and C++ produce different behavior when compiled in each language?
...in different values in i in C and C++:
int i = sizeof('a');
See Size of character ('a') in C/C++ for an explanation of the difference.
Another one from this article:
#include <stdio.h>
int sz = 80;
int main(void)
{
struct sz { char c; };
int val = sizeof(sz); // sizeof(in...
How can I change my default database in SQL Server without using MS SQL Server Management Studio?
...names are provided without quotes. Brackets are needed if name had special chars (most common example will be domain user which is domain\username and won't work without brackets).
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How to recursively find and list the latest modified files in a directory with subdirectories and ti
...ew install coreutils and use gstat instead of stat
– CharlesB
Mar 28 '13 at 10:56
37
You don't ne...
Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...b (In MySQL 5.6.4 and up) and Myisam Engines
You can only use FULLTEXT on CHAR, VARCHAR and TEXT column types
FULLTEXT index involves a LOT more than just creating an index. There's a bunch of system tables created, a completely separate caching system and some specific rules and optimizations app...