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E731 do not assign a lambda expression, use a def
...rst form means that the name of the resulting
function object is specifically 'f' instead of the generic '<lambda>'.
This is more useful for tracebacks and string representations in
general. The use of the assignment statement eliminates the sole
benefit a lambda expression can offer o...
Catch Ctrl-C in C
...
With a signal handler.
Here is a simple example flipping a bool used in main():
#include <signal.h>
static volatile int keepRunning = 1;
void intHandler(int dummy) {
keepRunning = 0;
}
// ...
int main(void) {
signal(SIGINT, intHandler);
while (...
How to center align the cells of a UICollectionView?
...nt, you could adjust that one too, if you want to center the content vertically in the screen.
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Equation (expression) parser with precedence?
...ve descent parser.
To get precedence you need to think recursively, for example, using your sample string,
1+11*5
to do this manually, you would have to read the 1, then see the plus and start a whole new recursive parse "session" starting with 11... and make sure to parse the 11 * 5 into its o...
hash function for string
...t want the rotation to be an even multiple of the byte size either.
For example, assuming the common case of 8 bit bytes, you might rotate by 5 bits:
int hash(char const *input) {
int result = 0x55555555;
while (*input) {
result ^= *input++;
result = rol(result, 5);
...
Various ways to remove local Git changes
...itory and checked out a branch. I worked on it, and then decided to remove all my local changes, as I wanted the original copy.
...
Rename master branch for both local and remote Git repositories
...st thing to renaming is deleting and then re-creating on the remote. For example:
git branch -m master master-old
git push remote :master # delete master
git push remote master-old # create master-old on remote
git checkout -b master some-ref # create a new local master
git push remot...
How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
...e now = new Date(); // java.util.Date, NOT java.sql.Date or java.sql.Timestamp!
String format1 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS", Locale.ENGLISH).format(now);
String format2 = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z", Locale.ENGLISH).format(now);
String format3 = new Simple...
Stripping everything but alphanumeric chars from a string in Python
..."
100 '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c'
Here's what happens if you give re.sub a bit more work to do:
C:\junk>\python26\python -mtimeit -s"d=''.join(c for c in map(chr,range(256)) if not c.isalnum());s='foo-'...
How do I use HTML as the view engine in Express?
...ing template engine and learning this will help you achieve better design & scalability.
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