大约有 5,200 项符合查询结果（耗时：0.0387秒） [XML]
Is there hard evidence of the ROI of unit testing?
...
98
Yes. This is a link to a study by Boby George and Laurie Williams at NCST and a another by Nag...
Do I cast the result of malloc?
...
dirkgentlydirkgently
98.6k1616 gold badges119119 silver badges180180 bronze badges
...
What is the difference between Non-Repeatable Read and Phantom Read?
...
ThiloThilo
235k8989 gold badges460460 silver badges612612 bronze badges
...
How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
...njoy it!!!
Just because I have had problems with my hosting provider
<?php /*
Author: Luis Siquot
Purpose: Check ajax performance and errors
License: GPL
site5: Please don't drop json requests (nor delay)!!!!
*/
$r = (int)$_GET['r'];
$w = (int)$_GET['w'];
if($r) {
sleep($w);
ech...
Best way to store password in database [closed]
...ssword: Best Practices?
Is it ever ok to store password in plain text in a php variable or php constant?
To clarify a bit further on the salting bit, the danger with simply hashing a password and storing that is that if a trespasser gets a hold of your database, they can still use what are known a...
When is CRC more appropriate to use than MD5/SHA1?
...
I ran every line of this PHP code in 1.000.000 loop. Results are in comments (#).
hash('crc32', 'The quick brown fox jumped over the lazy dog.');# 750ms 8 chars
hash('crc32b','The quick brown fox jumped over the lazy dog.');# 700ms 8 chars
has...
Catching java.lang.OutOfMemoryError?
... }
}
}
Output of this code:
1 : Memory Use :0M/247M
..
..
..
98 : Memory Use :0M/247M
99 : Memory Use :0M/247M
100 : Memory Use :0M/247M
If running something critical, I usually catch the Error, log it to syserr, then log it using my logging framework of choice, then proceed to relea...
.NET obfuscation tools/strategy [closed]
...ion" is removed with mouse click: woodmann.com/collaborative/tools/index.php/Dumbassembly
– Elmue
Mar 6 '14 at 3:37
2
...
Is System.nanoTime() completely useless?
... series of numbers from the negative portion of that timeline. -100, -99, -98 (obviously much bigger values in practice). They are going in the correct direction (increasing), so there is no issue here.
– ToolmakerSteve
Sep 12 '14 at 18:44
...
What is copy-on-write?
...
I found this good article about zval in PHP, which mentioned COW too:
Copy On Write (abbreviated as ‘COW’) is a trick designed to save memory. It is used more generally in software engineering. It means that PHP will copy the memory (or allocate new memory ...