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How to check if character is a letter in Javascript?
I am extracting a character in a Javascript string with:
14 Answers
14
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Discuz! X3 论坛标题字数突破80的限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...分来修改：
一、修改数据库subject字段的长度，默认都是char(80)；
二、修改JS验证字符数文件；
三、修改模板中写死的字符限制数；
四，修改函数验证文件；
五，修改语言包文件。
修改的文件一览如下（数据库修改 _forum_po...
__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...数，其功能类似于printf：
//m=1；n=2
extern void myprint(const char *format,...) __attribute__((format(printf,1,2)));
//m=2；n=3
extern void myprint(int l，const char *format,...)
__attribute__((format(printf,2,3)));
需要特别注意的是，如果myprint是一个函数的成员...
MD5 algorithm in Objective-C
...cess
@implementation NSString (MyAdditions)
- (NSString *)md5
{
const char *cStr = [self UTF8String];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5( cStr, (int)strlen(cStr), result ); // This is the md5 call
return [NSString stringWithFormat:
@"%02x%02x%02x%02x%02x%02x%...
hash function for string
... had nice results with djb2 by Dan Bernstein.
unsigned long
hash(unsigned char *str)
{
unsigned long hash = 5381;
int c;
while (c = *str++)
hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
return hash;
}
...
How does grep run so fast?
... how far ahead it can skip in the input whenever it finds a
non-matching character.
GNU grep also unrolls the inner loop of Boyer-Moore, and sets up the
Boyer-Moore delta table entries in such a way that it doesn't need to
do the loop exit test at every unrolled step. The result of this ...
C++ Convert string (or char*) to wstring (or wchar_t*)
...nclude <string>
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
std::string narrow = converter.to_bytes(wide_utf16_source_string);
std::wstring wide = converter.from_bytes(narrow_utf8_source_string);
Longer online compilable and runnable example:
(They all sho...
Way to get all alphabetic chars in an array in PHP?
Is there a way to get all alphabetic chars (A-Z) in an array in PHP so I can loop through them and display them?
14 Answers...
Uint8Array to string in Javascript
... string (I believe Javascript uses 16 bit Unicode)? I dont want to add one character at the time as the string concaternation would become to CPU intensive.
...
Determine the number of lines within a text file
...lt is another problem as you read the whole file just to count the newline character(s),
At some point, someone is going to have to read the characters in the file, regardless if this the framework or if it is your code. This means you have to open the file and read it into memory if the file is la...