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Why can't static methods be abstract in Java?
...en you have a call to that method in the superclass itself. Suppose Super.foo calls Super.bar. If a subclass implements Subclass.bar, and then calls foo, then foo will still call Super.bar, not Subclass.bar. Hence, what you really have is two entirely different and unrelated methods both called "...
How to declare Return Types for Functions in TypeScript
... will be a place where you have to have an explicit return type.
function foo(){
if (true)
return "string";
else
return 0;
}
This, however, will work:
function foo() : any{
if (true)
return "string";
else
return 0;
}
...
Execute a terminal command from a Cocoa app
...
You can use NSTask. Here's an example that would run '/usr/bin/grep foo bar.txt'.
int pid = [[NSProcessInfo processInfo] processIdentifier];
NSPipe *pipe = [NSPipe pipe];
NSFileHandle *file = pipe.fileHandleForReading;
NSTask *task = [[NSTask alloc] init];
task.launchPath = @"/usr/bin/gre...
How do I copy an entire directory of files into an existing directory using Python?
... containing one or more files). Make sure there is not a directory named foo .
14 Answers
...
Mocking a class: Mock() or patch()?
...MyClass')
... def create_instance2(MyClass):
... MyClass.return_value = 'foo'
... return create_instance()
...
>>> i = create_instance2()
>>> i
'foo'
>>> def create_instance():
... print MyClass
... return MyClass()
...
>>> create_instance2()
<mock.Moc...
Is SQL syntax case sensitive?
...es, then yes they are, but not the commands themselves.
So
SELECT * FROM foo;
is the same as
select * from foo;
but not the same as
select * from FOO;
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improve this answer
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What happens when there's insufficient memory to throw an OutOfMemoryError?
... try {
for (int n = 1; true; n += n) {
int[] foo = new int[n];
}
} catch (OutOfMemoryError e) {
if (e == o)
System.out.println("Got the same OutOfMemoryError twice: " + e);
else test(e);
}
}
pub...
How to construct a relative path in Java from two absolute paths (or URLs)?
... dir
// For example, the relative path from
//
// /foo/bar/baz/gg/ff to /foo/bar/baz
//
// ".." if ff is a file
// "../.." if ff is a directory
//
// The following is a heuristic to figure out if the base refers to a file or dir. It's ...
How to get name of exception that was caught in Python?
...tion.__class__.__name__
exception.__class__.__qualname__
e.g.,
try:
foo = bar
except Exception as exception:
assert type(exception).__name__ == 'NameError'
assert exception.__class__.__name__ == 'NameError'
assert exception.__class__.__qualname__ == 'NameError'
...
How do I append one string to another in Python?
...neck caused by string concatenations then just stick with + and +=:
s = 'foo'
s += 'bar'
s += 'baz'
That said, if you're aiming for something like Java's StringBuilder, the canonical Python idiom is to add items to a list and then use str.join to concatenate them all at the end:
l = []
l.append...