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Should I use Java's String.format() if performance is important?
... follow (average of 5 runs each):
Approach Time(ms) Memory allocated (long)
'+' operator 747 320,504
String.format 16484 373,312
StringBuilder 769 57,344
We can see that String '+' and StringBuilder are practicall...
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
... if (sharedInstance == nil) {
sharedInstance = [[MyClass alloc] init];
}
}
return sharedInstance;
}
The benefit of dispatch_once() over this is that it's faster. It's also semantically cleaner, because it also protects you from multiple threads doing alloc init of...
Hidden features of mod_rewrite
...directories
RewriteCond %{REQUEST_FILENAME} !-d
# map requests to index.php and append as a query string
RewriteRule ^(.*)$ index.php?query=$1
Since Apache 2.2.16 you can also use FallbackResource.
Handling 301/302 redirects:
RewriteEngine on
# 302 Temporary Redirect (302 is the default, but ...
push_back vs emplace_back
...ving does not make s invalid, the move will only steal the internal memory allocation already done in s and leave it in a defaulted state (no sting allocated) which when destructed will be fine as if you had just typed std::string str;
– David
Nov 30 '10 at 0:5...
PHP function to make slug (URL string)
... use Transliterator::transliterate function to create a slug easily.
<?php
$string = 'Namnet på bildtävlingen';
$slug = \Transliterator::createFromRules(
':: Any-Latin;'
. ':: NFD;'
. ':: [:Nonspacing Mark:] Remove;'
. ':: NFC;'
. ':: [:Punctuation:] Remove;'
. ':: Lowe...
JavaScript equivalent of PHP’s die
...
I think that if PHP has a "firebug" equivalent, it should also write "1 error" on die() ;-) Good answer!
– Adrian Maire
Apr 25 '13 at 14:04
...
How to render a DateTime object in a Twig template
...
Twig's date function uses the same format as the php function (from the Twig docs). For anyone looking for other formats, php.net/manual/en/function.date.php.
– JonnyS
Mar 19 '14 at 20:22
...
How do I find where an exception was thrown in C++?
...bt]: (8) ./test(__libc_start_main+0x95) [0x42017589]
[bt]: (9) ./test(__eh_alloc+0x3d) [0x8048b21]
signal 6 (Aborted), address is 0x1239 from 0x42029331
crit_err_hdlr backtrace returned 13 frames
[bt]: (1) ./test(kill+0x11) [0x42029331]
[bt]: (2) ./test(abort+0x16e) [0x4202a8c2]
[bt]: (3) ./test [...
How do you reverse a string in place in JavaScript?
...mmutable strings, thus defeating the whole idea of moving a string without allocating any new memory.
While the solutions above do indeed reverse a string, they do not do it without allocating more memory, and thus do not satisfy the conditions. You need to have direct access to the string as allo...
PHP Remove elements from associative array
I have an PHP array that looks something like this:
9 Answers
9
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