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Forward an invocation of a variadic function in C
...t. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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How to read a file without newlines?
...works if the file ends with a newline, otherwise the last line will lose a character.
This assumption is true in most cases (especially for files created by text editors, which often do add an ending newline anyway).
If you want to avoid this you can add a newline at the end of file:
with open(th...
How to remove spaces from a string using JavaScript?
...
split(' ') and join won't remove \n , \t white space chars, another workaround is a.split('').map(c =>c.trim()).join('')
– rab
Apr 18 '19 at 10:40
ad...
Get all directories within directory nodejs
...e('path');
function flatten(lists) {
return lists.reduce((a, b) => a.concat(b), []);
}
function getDirectories(srcpath) {
return fs.readdirSync(srcpath)
.map(file => path.join(srcpath, file))
.filter(path => fs.statSync(path).isDirectory());
}
function getDirectoriesRecursive...
Why should hash functions use a prime number modulus?
...a simple hash function works by taking the "component parts" of the input (characters in the case of a string), and multiplying them by the powers of some constant, and adding them together in some integer type. So for example a typical (although not especially good) hash of a string might be:
(fir...
node.js execute system command synchronously
...2012: How to get STDOUT]
var lib = ffi.Library(null, {
// FILE* popen(char* cmd, char* mode);
popen: ['pointer', ['string', 'string']],
// void pclose(FILE* fp);
pclose: ['void', [ 'pointer']],
// char* fgets(char* buff, int buff, in)
fgets: ['string', ['string', 'int','po...
Allowed characters in filename [closed]
Where can I find a list of allowed characters in filenames, depending on the operating system?
(e.g. on Linux, the character : is allowed in filenames, but not on Windows)
...
How to handle Objective-C protocols that contain properties?
...hInteger:(factor*amount)];
}
// <<
@end
int main(int argc, const char * argv[])
{
@autoreleasepool {
Person *duncan=[[Person alloc]initConforming];
duncan.firstname=@"Duncan";
duncan.lastname=@"Smith";
[Viewer printLargeDescription:duncan];
S...
Dynamic Sorting within SQL Stored Procedures
...ORDER BY
mySort
This one is easy to beat into submission -- you can concat fields in your mySort column, reverse the order with math or date functions, etc.
Preferably though, I use my asp.net gridviews or other objects with build-in sorting to do the sorting for me AFTER retrieving the data...
Operator overloading in Java
...ing is the handling of + for strings, which either results in compile-time concatenation of constants or execution-time concatenation using StringBuilder/StringBuffer. You can't define your own operators which act in the same way though.
For a Java-like (and JVM-based) language which does support o...