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Get first n characters of a string
How can I get the first n characters of a string in PHP? What's the fastest way to trim a string to a specific number of characters, and append '...' if needed?
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How to assign string to bytes array
I want to assign string to bytes array:
9 Answers
9
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How can I use “sizeof” in a preprocessor macro?
...ou can use following macro:
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
Usage:
BUILD_BUG_ON( sizeof(someThing) != PAGE_SIZE );
This article explains in details why it works.
3. MS-specific
On Microsoft C++ compiler you can use C_ASSERT macro (requires #include &...
Difference between 'struct' and 'typedef struct' in C++?
...hat C++
generates a typedef for every tag
name, such as
typedef class string string;
Unfortunately, this is not entirely
accurate. I wish it were that simple,
but it's not. C++ can't generate such
typedefs for structs, unions, or enums
without introducing incompatibilities
with ...
QString to char* conversion
I was trying to convert a QString to char* type by the following methods, but they don't seem to work.
10 Answers
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Pointer expressions: *ptr++, *++ptr and ++*ptr
...
The statement also initializes p to point to the first character in the string literal "Hello". For the sake of this exercise, it's important to understand p as pointing not to the entire string, but only to the first character, 'H'. After all, p is a pointer to one char, not to the entire string...
What is the meaning of “__attribute__((packed, aligned(4))) ”
...es in some cases. Consider the following structure:
typedef struct
{
char Data1;
int Data2;
unsigned short Data3;
char Data4;
}sSampleStruct;
sizeof(sSampleStruct) will be 12 rather than 8. Because of structure padding. By default, In X86, structures will be padded to 4-byte ...
Best practice multi language website
...e our translated files instead of calling a translation function for every string in the file:
// This function was written by Thomas Bley, not by me
function translate($file) {
$cache_file = 'cache/'.LANG.'_'.basename($file).'_'.filemtime($file).'.php';
// (re)build translation?
if (!file_ex...
how to convert a string to date in mysql?
I have a string column which acts as a date and I want to select it as a date .
5 Answers
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How to create a trie in Python
...
Static memory-efficient Trie structures for Python (2.x and 3.x).
String data in a MARISA-trie may take up to 50x-100x less memory than
in a standard Python dict; the raw lookup speed is comparable; trie
also provides fast advanced methods like prefix search.
Based on marisa-trie C...