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What is the optimal algorithm for the game 2048?
...lementation
My approach encodes the entire board (16 entries) as a single 64-bit integer (where tiles are the nybbles, i.e. 4-bit chunks). On a 64-bit machine, this enables the entire board to be passed around in a single machine register.
Bit shift operations are used to extract individual rows a...
How can I generate random alphanumeric strings?
...ouTube's video IDs are A-Z a-z 0-9, as well as "-" and "_", which produces 64 possible characters, which divides into 256 evenly. Coincidence? I think not! :)
– qJake
Sep 26 '16 at 18:25
...
Why unsigned integer is not available in PostgreSQL?
... fit into long.
Another thing, if I did have the need to store 32 bit or 64 bit types, I can use PostgreSQL int4 or int8 respectively, just remembering that the natural order or arithmetic won't work reliably. But storing and retrieving is unaffected by that.
Here is how I can implement a simp...
What data type to use for hashed password field and what length?
...6) or BINARY(28)
SHA-256 generates a 256-bit hash value. You can use CHAR(64) or BINARY(32)
SHA-384 generates a 384-bit hash value. You can use CHAR(96) or BINARY(48)
SHA-512 generates a 512-bit hash value. You can use CHAR(128) or BINARY(64)
BCrypt generates an implementation-dependent 448-bit h...
Android Hello-World compile error: Intellij cannot find aapt
... and executing aapt directly also says file not found, you may be having a 64-bit issue: link
– Tomas
Jun 2 '13 at 7:07
...
How to pip or easy_install tkinter on Windows
...d say "This is Tcl/Tk version 8.5"; make sure it is not 8.4!
2) Uninstall 64-bit Python and install 32 bit Python.
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Uncaught Error: SECURITY_ERR: DOM Exception 18 when I try to set a cookie
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Objective-C and Swift URL encoding
...tersInString:@" \"#%/:<>?@[\\]^`{|}"] invertedSet];
Creating a Base64
In the case of Base64 characterset:
NSCharacterSet *URLBase64CharacterSet = [[NSCharacterSet characterSetWithCharactersInString:@"/+=\n"] invertedSet];
For Swift 3.0:
var escapedString = originalString.addingPe...
Is there a /dev/null on Windows?
...
64
According to this message on the GCC mailing list, you can use the file "nul" instead of /dev/n...
Is gettimeofday() guaranteed to be of microsecond resolution?
...of detail.
#include <stdio.h>
#include <stdint.h>
inline uint64_t rdtsc() {
uint32_t lo, hi;
__asm__ __volatile__ (
"xorl %%eax, %%eax\n"
"cpuid\n"
"rdtsc\n"
: "=a" (lo), "=d" (hi)
:
: "%ebx", "%ecx");
return (uint64_t)hi << 32 | lo...