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Linux编程中各种头文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...务的函数原型，例如read函数、write函数和getpid函数
3. string.h
提供比如 bzero,bcopy,bcmp,memset,memcpy memcmp 等函数。
4.netdb.h定义了与网络有关的结构，变量类型，宏，函数。例如：
struct hostent *gethostbyaddr(const void *addr, size_t len, int...
What should a Multipart HTTP request with multiple files look like? [duplicate]
... just to avoid any confusion: notice that before each boundary string in the content there are two extra dashes --<boundary>. For the last line is --<boundary>--
– Radu Simionescu
Jun 14 '13 at 12:03
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Why can't Python parse this JSON data?
...
That is why your text is type unicode not string. Most time it is better to have text in unicode for german umlauts and for sharing text results with other modules/programs etc. . So you're good!
– Michael P
Aug 29 '15 at 11:56
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if A vs if A is not None:
...back to database stuff. There's a big difference between NULL and an empty string. An empty string typically says "there's a value here, and that value is nothing at all". NULL says "this value hasn't been entered."
In each of those cases, you'd want to use if A is None. You're checking for a speci...
C++: What is the size of an object of an empty class?
...aligned on a word boundary (such as an integer). For example, if you place char x; int y; inside the class, my GCC clocks it at eight bytes (since the second int must be aligned in that implementation).
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How does this program work?
...oat is converted to double, as the prototype of printf is int printf(const char*, ...), from 6.5.2.2/7,
The ellipsis notation in a function prototype declarator causes argument type conversion to stop after the last declared parameter. The default argument promotions are performed on trailing ar...
Convert to binary and keep leading zeros in Python
...most compact and direct option.
If you are putting the result in a larger string, use an formatted string literal (3.6+) or use str.format() and put the second argument for the format() function after the colon of the placeholder {:..}:
>>> value = 14
>>> f'The produced output, i...
Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
...57
or
byte b = 100;
b /= 2.5;
System.out.println(b); // prints 40
or
char ch = '0';
ch *= 1.1;
System.out.println(ch); // prints '4'
or
char ch = 'A';
ch *= 1.5;
System.out.println(ch); // prints 'a'
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Tab key == 4 spaces and auto-indent after curly braces in Vim
... if I enable expandtab, is there a way to actually input the tab character in the text anyway?
– Daniele Segato
Mar 16 '16 at 10:47
3
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Best way to strip punctuation from a string
...om an efficiency perspective, you're not going to beat
s.translate(None, string.punctuation)
For higher versions of Python use the following code:
s.translate(str.maketrans('', '', string.punctuation))
It's performing raw string operations in C with a lookup table - there's not much that will...