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NSUserDefaults removeObjectForKey vs. setObject:nil
... *keys = [[[NSUserDefaults standardUserDefaults] dictionaryRepresentation] allKeys] copy];
for(NSString *key in keys) {
NSLog(@"Key Name: %@", key);
}
[keys release];
or simply dump the key/value dictionary of NSUserDefaults standardUserDefaults
NSLog(@"All contents of NSUserDefaults: %...
How to create an exit message
Is there a one line function call that quits the program and displays a message? I know in Perl it's as simple as:
4 Answer...
Is JSON Hijacking still an issue in modern browsers?
...addEventListener('click', toggleCapture);
toggleCapture();
[].forEach.call(document.body.querySelectorAll('input[type="button"]'), function(el) {
el.addEventListener('click', function() {
document.querySelector('textarea').innerHTML = 'Safe.';
eval(this.value);
});
}...
How can I make an EXE file from a Python program? [duplicate]
...exe converter using a simple graphical interface built using Eel and PyInstaller in Python.
py2exe is probably what you want, but it only works on Windows.
PyInstaller works on Windows and Linux.
Py2app works on the Mac.
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Which data type for latitude and longitude?
...y) which can be your lat / long. Occupies 16 bytes: 2 float8 numbers internally.
Or make it two columns of type float (= float8 or double precision). 8 bytes each.
Or real (= float4) if additional precision is not needed. 4 bytes each.
Or even numeric if you need absolute precision. 2 bytes for eac...
How do you use an identity file with rsync?
...load the key into memory. ssh will try identities from ssh-agent automatically if it can find them. Commands would be
eval $(ssh-agent) # Create agent and environment variables
ssh-add ~/.ssh/1234-identity
ssh-agent is a user daemon which holds unencrypted ssh keys in memory. ssh finds it based...
What's the best way to check if a file exists in C?
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There are pitfalls associated with access(). There is a TOCTOU (time of check, time of use) window of vulnerability between using access() and whatever else you do afterwards. [...to be continued...]
– Jonathan Leff...
Access to Modified Closure
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In this case, it's okay, since you are actually executing the delegate within the loop.
If you were saving the delegate and using it later, however, you'd find that all of the delegates would throw exceptions when trying to access files[i] - they're capturing the var...
Do you use NULL or 0 (zero) for pointers in C++?
...ded. That's less common these days.
If you have to name the null pointer, call it nullptr; that's what it's called in C++11. Then, nullptr will be a keyword.
That said, don't sweat the small stuff.
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bash: shortest way to get n-th column of output
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Passing an appropriate delimiter to -d allows this to work.
– Yogh
Sep 27 '15 at 22:43
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