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Obfuscated C Code Contest 2006. Please explain sykes2.c
...amp;8)|i/64]/(i&2?1:8)%8;
putchar(32 | (b & 1));
}
}
Converting the recursion to a loop and sneaking in a bit more simplification:
// please don't pass any command-line arguments
main() {
int i;
for(i=447; i>=0; i--) {
if(i % 64 == 0) {
putchar('...
Google Authenticator implementation in Python
...def Truncate(hmac_sha1):
"""
Truncate represents the function that converts an HMAC-SHA-1
value into an HOTP value as defined in Section 5.3.
http://tools.ietf.org/html/rfc4226#section-5.3
"""
offset = int(hmac_sha1[-1], 16)
binary = int(hmac_sha1[(offset * 2):((offset ...
Android: Getting a file URI from a content URI?
... cover cursor null cases & conversion from content:// to file://
To convert file, read&write the file from gained uri
public static Uri getFilePathFromUri(Uri uri) throws IOException {
String fileName = getFileName(uri);
File file = new File(myContext.getExternalCacheDir(), fileN...
How to use SCNetworkReachability in Swift
I'm trying to convert this code snippet to Swift. I'm struggling on getting off the ground due to some difficulties.
7 An...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...oduces the following compilation error:
Constant value '500500' cannot be converted to a 'char'
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How do I execute a stored procedure once for each row returned by query?
...r INSERT and DELETEs. If you need to do multiple updates with IFs you can convert those to multiple UPDATE FROM with the #temp table and use CASE statements or WHERE conditions.
When working in a database try to lose the mindset of looping, it is a real performance drain, will cause locking/blocki...
Do I cast the result of malloc?
...n value of malloc. The pointer to void returned by malloc is automagically converted to the correct type. However, if you want your code to compile with a C++ compiler, a cast is needed. A preferred alternative among the community is to use the following:
int *sieve = malloc(sizeof *sieve * length)...
Python argparse: default value or specified value
...r-1 arguments
const=1 sets the default when there are 0 arguments
type=int converts the argument to int
If you want test.py to set example to 1 even if no --example is specified, then include default=1. That is, with
parser.add_argument('--example', nargs='?', const=1, type=int, default=1)
th...
Is there an alternative sleep function in C to milliseconds?
I have some source code that was compiled on Windows. I am converting it to run on Red Hat Linux.
6 Answers
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How do function pointers in C work?
...also valid since the standard says that a function name in this context is converted to the address of the function.
– hlovdal
May 9 '09 at 14:39
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