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How can I get the last 7 characters of a PHP string?
...$dynamicstring, -7);
From the php docs:
string substr ( string $string , int $start [, int $length ] )
If start is negative, the returned string will start at the start'th character from the end of string.
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Create a unique number with javascript time
...r case I got into trouble very fast because of toString(36) which I assume converts numerical value to it's ascii representation, not sure though, but i can see the problem, if you call your uuid generator often enough, only last 3 chars are changing so the chances are high that you will get into a ...
How to present popover properly in iOS 8
...
Here i Convert "Joris416" Swift Code to Objective-c,
-(void) popoverstart
{
ViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"PopoverView"];
UINavigationController *nav = [[UINavigation...
Exception 'open failed: EACCES (Permission denied)' on Android
...are already in your manifest.
// Storage Permissions
private static final int REQUEST_EXTERNAL_STORAGE = 1;
private static String[] PERMISSIONS_STORAGE = {
Manifest.permission.READ_EXTERNAL_STORAGE,
Manifest.permission.WRITE_EXTERNAL_STORAGE
};
/**
* Checks if the app has permissi...
UnicodeDecodeError when reading CSV file in Pandas with Python
...e to use Latin1 encoding because it accept any possible byte as input (and convert it to the unicode character of same code):
pd.read_csv(input_file_and_path, ..., encoding='latin1')
You know that most of the file is written with a specific encoding, but it also contains encoding errors. A real wo...
When exactly is it leak safe to use (anonymous) inner classes?
...ave been reading some articles on memory leaks in Android and watched this interesting video from Google I/O on the subject .
...
How to generate random number in Bash?
...
Please see $RANDOM:
$RANDOM is an internal Bash function
(not a constant) that returns a
pseudorandom integer in the range
0 - 32767. It should not be used to
generate an encryption key.
...
How to update a value, given a key in a hashmap?
Suppose we have a HashMap<String, Integer> in Java.
17 Answers
17
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Method Overloading for null argument
...sion of a method that's available (see JLS §15.12.2).
Object, char[] and Integer can all take null as a valid value. Therefore all 3 version are applicable, so Java will have to find the most specific one.
Since Object is the super-type of char[], the array version is more specific than the Objec...
Python (and Python C API): __new__ versus __init__
...xample, say you wanted to create a subclass of tuple that can contain only integral values between 0 and size.
class ModularTuple(tuple):
def __new__(cls, tup, size=100):
tup = (int(x) % size for x in tup)
return super(ModularTuple, cls).__new__(cls, tup)
You simply can't do t...