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PHP json_decode() returns NULL with valid JSON?
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It could be the encoding of the special characters. You could ask json_last_error() to get definite information.
Update: The issue is solved, look at the "Solution" paragraph in the question.
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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
...ruction.)
Example code for gcc:
#include <iostream>
int main (int,char**)
{
int n=1;
for (;;++n) {
int msb;
asm("bsrl %1,%0" : "=r"(msb) : "r"(n));
std::cout << n << " : " << msb << std::endl;
}
return 0;
}
See also this inline assembler tutoria...
How to get 0-padded binary representation of an integer in java?
...ormatter, I would advise you to either use String.replace to replace space character with zeros, as in:
String.format("%16s", Integer.toBinaryString(1)).replace(" ", "0")
Or implement your own logic to convert integers to binary representation with added left padding somewhere along the lines giv...
Limit number of characters allowed in form input text field
How do I limit or restrict the user to only enter a maximum of five characters in the textbox?
13 Answers
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How to find nth occurrence of character in a string?
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Two simple options occur:
Use charAt() repeatedly
Use indexOf() repeatedly
For example:
public static int nthIndexOf(String text, char needle, int n)
{
for (int i = 0; i < text.length(); i++)
{
if (text.charAt(i) == needle)
{...
JPG vs. JPEG image formats
...ut it is inaccurate. • The JPEG group were mostly Unix shops, thus the 4-char .jpeg extension, not because of Mac. • It was the DOS 8.3 limit that caused the shortening to .jpg — windows was just a shell on top of DOS. • The commonly accepted .jpg form is because of programs that had to cope...
How to convert a string to lower or upper case in Ruby
...irb -ractive_support/core_ext/string
"STRING ÁÂÃÀÇÉÊÍÓÔÕÚ".mb_chars.downcase.to_s
=> "string áâãàçéêíóôõú"
"string áâãàçéêíóôõú".mb_chars.upcase.to_s
=> "STRING ÁÂÃÀÇÉÊÍÓÔÕÚ"
...
Position of least significant bit that is set
...x077CB531U)) >> 27];
}
}
return total;
}
unsigned char lowestBitTable[256];
int get_lowest_set_bit(unsigned num) {
unsigned mask = 1;
for (int cnt = 1; cnt <= 32; cnt++, mask <<= 1) {
if (num & mask) {
return cnt;
}
}
...
What is meant by immutable?
...omething like this:
// Assume string is stored like this:
struct String { char* characters; unsigned int length; };
// Passing pointers because Java is pass-by-reference
struct String* substring(struct String* in, unsigned int begin, unsigned int end)
{
struct String* out = malloc(sizeof(struc...
PHP best way to MD5 multi-dimensional array?
...) function.
Test results for multi-dimensional array with md5-hashes (32 char) in keys and values:
Test name Repeats Result Performance
serialize 10000 0.761195 sec +0.00%
print_r 10000 1.669689 sec -119.35%
json_encode 10000...