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How to check if a file exists in Go?
...doesn't exist, equivalent to Python's if not os.path.exists(filename):
if _, err := os.Stat("/path/to/whatever"); os.IsNotExist(err) {
// path/to/whatever does not exist
}
To check if a file exists, equivalent to Python's if os.path.exists(filename):
Edited: per recent comments
if _, err := o...
How can I get current location from user in iOS
...be kept calling. Happy Coding Guys!! Cheers!!
– Apple_iOS0304
Mar 13 '13 at 4:07
5
You are the ty...
Pass Method as Parameter using C#
...delegates and events, but you may find it useful anyway.
1 This is just based on the generic Func<T, TResult> delegate type in the framework; you could easily declare your own:
public delegate int MyDelegateType(string value)
and then make the parameter be of type MyDelegateType instead....
Way to go from recursion to iteration
...mple doesn't check stack boundaries... and really you could size the stack based on the worst case given left and and right values. But you get the idea.
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What is “:-!!” in C code?
...ld.
The macro is somewhat misnamed; it should be something more like BUILD_BUG_OR_ZERO, rather than ...ON_ZERO. (There have been occasional discussions about whether this is a confusing name.)
You should read the expression like this:
sizeof(struct { int: -!!(e); }))
(e): Compute expression e....
How to add a custom right-click menu to a webpage?
... implementation in the answer below by @MohamedIqzas (stackoverflow.com/a/16481062/264097). In the answer below the default context menu is suppressed only for a certain HTML element, not for the whole document. This makes it much less intrusive.
– Alex Fainshtein
...
How do I know if a generator is empty from the start?
...quence in memory. So there's no backward traversal.
You could write a has_next function or maybe even slap it on to a generator as a method with a fancy decorator if you wanted to.
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Positioning MKMapView to show multiple annotations at once
...(IBAction)zoomOut:(id)sender {
CLLocationCoordinate2D southWest = _newLocation.coordinate;
CLLocationCoordinate2D northEast = southWest;
southWest.latitude = MIN(southWest.latitude, _annotation.coordinate.latitude);
southWest.longitude = MIN(southWest.longitude, _an...
PHP: If internet explorer 6, 7, 8 , or 9
... I ended up using a variation of, which checks for IE8 and below:
if (preg_match('/MSIE\s(?P<v>\d+)/i', @$_SERVER['HTTP_USER_AGENT'], $B) && $B['v'] <= 8) {
// Browsers IE 8 and below
} else {
// All other browsers
}
...
C# if/then directives for debug vs release
...uge fan of the #if stuff, especially if you spread it all around your code base as it will give you problems where Debug builds pass but Release builds fail if you're not careful.
So here's what I have come up with (inspired by #ifdef in C#):
public interface IDebuggingService
{
bool RunningIn...