大约有 22,000 项符合查询结果（耗时：0.0246秒） [XML]
Which is faster : if (bool) or if(int)?
...ro values. To the CPU, usually, everything is one of the scalar types or a string of them.
A given compiler and a given ABI will need to choose specific sizes for int and bool and when, like in your case, these are different sizes they may generate slightly different code, and at some levels of op...
PHP json_decode() returns NULL with valid JSON?
...ked for me
json_decode( preg_replace('/[\x00-\x1F\x80-\xFF]/', '', $json_string), true );
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Start an Activity with a parameter
...ust" use the package name to prefix your keys.) Simply use intent.putExtra(String, Int).
– Sam
Oct 27 '12 at 19:32
1
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Regex to validate password strength
...:
^ Start anchor
(?=.*[A-Z].*[A-Z]) Ensure string has two uppercase letters.
(?=.*[!@#$&*]) Ensure string has one special case letter.
(?=.*[0-9].*[0-9]) Ensure string has two digits.
(?=.*[a-z].*[a-z].*[a-z]) Ensure string has three lowercase le...
How to send SMS in Java
...lPortEventListener,
CommPortOwnershipListener {
private static String comPort = "COM6"; // This COM Port must be connect with GSM Modem or your mobile phone
private String messageString = "";
private CommPortIdentifier portId = null;
private Enumeration portList;
priv...
Convert text into number in MySQL query
...
This should work:
SELECT field,CONVERT(SUBSTRING_INDEX(field,'-',-1),UNSIGNED INTEGER) AS num
FROM table
ORDER BY num;
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How to achieve code folding effects in Emacs?
...er way to skin the cat:
As it happens, you don’t need any package or extra configuration for
that. Just go to any source file, type
M-1 C-x $ and magic happens!
As usual, it’s white magic: C-x $ will bring your code back.
We can use Emacs’ help system to discover what’s going o...
How do I change bash history completion to complete what's already on the line?
...Readline library.
#
# Arrow keys in keypad mode
#
"\C-[OD" backward-char
"\C-[OC" forward-char
"\C-[OA" previous-history
"\C-[OB" next-history
#
# Arrow keys in ANSI mode
#
"\C-[[D" backward-char
"\C-[[C" forward-char
"\C-[[A" previous-history
"\C-[[B...
内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
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清单 1. 简单的潜在堆内存丢失和缓冲区覆盖
void f1(char *explanation)
{
char p1;
p1 = malloc(100);
(void) sprintf(p1,
"The f1 error occurred because of '%s'.",
explanation);
loca...
Alternative to itoa() for converting integer to string C++? [duplicate]
...ing if there was an alternative to itoa() for converting an integer to a string because when I run it in visual Studio I get warnings, and when I try to build my program under Linux, I get a compilation error.
...