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Convert a string representation of a hex dump to a byte array using Java?
...;
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ Character.digit(s.charAt(i+1), 16));
}
return data;
}
Reasons why it is an improvement:
Safe with leading zeros (unlike BigInteger) and wit...
Is there a simple way to convert C++ enum to string?
...
Excellent! Worked as a charm with a simple python script. Thanks.
– Edu Felipe
Oct 14 '08 at 19:43
6
...
Coding Practices which enable the compiler/optimizer to make a faster program
...w customer\n"
"3) Destroy\n"
"4) Launch Nasal Demons\n"
"Enter selection: ";
static const size_t Menu_Text_Length = sizeof(Menu_Text) - sizeof('\0');
//...
std::cout.write(Menu_Text, Menu_Text_Length);
The efficiency of this technique can be visually demonstrated. :-)
Don't use print...
Can I use a function for a default value in MySql?
... update previously existing rows, like this:
UPDATE app_users SET uuid = (SELECT uuid());
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How to remove first 10 characters from a string?
How to ignore the first 10 characters of a string?
12 Answers
12
...
How to print a int64_t type in C
...t:
#include <stdio.h>
#include <stdint.h>
int main(int argc, char *argv[])
{
int64_t a = 1LL << 63;
uint64_t b = 1ULL << 63;
printf("a=%jd (0x%jx)\n", a, a);
printf("b=%ju (0x%jx)\n", b, b);
return 0;
}
Compiling this code with gcc -Wall -pedantic -...
How to determine if a string is a number with C++?
...nt way would be just to iterate over the string until you find a non-digit character. If there are any non-digit characters, you can consider the string not a number.
bool is_number(const std::string& s)
{
std::string::const_iterator it = s.begin();
while (it != s.end() && std:...
Objective-C formatting string for boolean?
...
In Objective-C, the BOOL type is just a signed char. From <objc/objc.h>:
typedef signed char BOOL;
#define YES (BOOL)1
#define NO (BOOL)0
So you can print them using the %d formatter But that will only print a 1 or a 0, not YES or NO.
Or you can...
Case objects vs Enumerations in Scala
...B', 3)
, KNIGHT('N', 3)
, ROOK('R', 5)
, PAWN('P', 1)
;
private char character;
private int pointValue;
private ChessPiece(char character, int pointValue) {
this.character = character;
this.pointValue = pointValue;
}
public int getCharacter() {
return character;
...
Still Reachable Leak detected by Valgrind
...d are almost always leaks.
Here is an example
int foo(void)
{
static char *working_buf = NULL;
char *temp_buf;
if (!working_buf) {
working_buf = (char *) malloc(16 * 1024);
}
temp_buf = (char *) malloc(5 * 1024);
....
....
....
}
Valgrind will report wo...