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Concept behind these four lines of tricky C code
... {
m[0] *= 2;
main();
}
else
{
printf((char*) m);
}
}
It recursively calls main() 771 times.
In the beginning, m[0] = 7709179928849219.0, which stands for C++Suc;C. In every call, m[0] gets doubled, to "repair" last two letters. In the last call, m[0] cont...
New line in Sql Query
...server-difference-between-line-feed-n-and-carriage-return-r-t-sql-new-line-char/
DECLARE @NewLineChar AS CHAR(2) = CHAR(13) + CHAR(10)
PRINT ('SELECT FirstLine AS FL ' + @NewLineChar + 'SELECT SecondLine AS SL')
share
...
Trim spaces from start and end of string
... for (var i = str.length - 1; i >= 0; i--) {
if (/\S/.test(str.charAt(i))) {
str = str.substring(0, i + 1);
break;
}
}
return str;
}
"if you want to handle long strings exceptionally fast in all browsers".
References
blog.stevenlevithan.com --...
Method Overloading for null argument
...licable version of a method that's available (see JLS §15.12.2).
Object, char[] and Integer can all take null as a valid value. Therefore all 3 version are applicable, so Java will have to find the most specific one.
Since Object is the super-type of char[], the array version is more specific tha...
Windows下 C++网络延时检测 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
#define PING_TIMES 2 //ping 4 次
typedef struct _IPINFO
{
unsigned char Ttl; // Time To Live
unsigned char Tos; // Type Of Service
unsigned char IPFlags; // IP flags
unsigned char OptSize; // Size of options data
unsigned char FAR *Options; // Options data buffer
}IPINFO;...
How to reset index in a pandas dataframe? [duplicate]
...is faster:
df = pd.DataFrame({'a':[8,7], 'c':[2,4]}, index=[7,8])
df = pd.concat([df]*10000)
print (df.head())
In [298]: %timeit df1 = df.reset_index(drop=True)
The slowest run took 7.26 times longer than the fastest. This could mean that an intermediate result is being cached.
10000 loops, best o...
How can I check if character in a string is a letter? (Python)
... know about islower and isupper , but can you check whether or not that character is a letter?
For Example:
6 Answers
...
Convert all first letter to upper case, rest lower for each word
...
There's a couple of ways to go about converting the first char of a string to upper case.
The first way is to create a method that simply caps the first char and appends the rest of the string using a substring:
public string UppercaseFirst(string s)
{
return char.ToUp...
Generating a random password in php
...github.com/paragonie/random_compat
*
* @param int $length How many characters do we want?
* @param string $keyspace A string of all possible characters
* to select from
* @return string
*/
function random_str(
$length,
$keyspace = '0123456789abcdefghijklmn...
Why do we need C Unions?
... Here is a trivial example:
typedef union
{
struct {
unsigned char byte1;
unsigned char byte2;
unsigned char byte3;
unsigned char byte4;
} bytes;
unsigned int dword;
} HW_Register;
HW_Register reg;
Then you can access the reg as follows:
reg.dword = 0x...