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Create objective-c class instance by name?
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id object = [[NSClassFromString(@"NameofClass") alloc] init];
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How to get UTC time in Python?
...poses when you need to calculate an amount of time spent between two dates all that you need is to substract end and start dates. The results of such substraction is a timedelta object.
From the python docs:
class datetime.timedelta([days[, seconds[, microseconds[, milliseconds[, minutes[, hours[,...
MySQL DISTINCT on a GROUP_CONCAT()
...d Jun 21 '10 at 9:47
Daniel Vassallo
301k6666 gold badges475475 silver badges424424 bronze badges
answered Jun 21 '10 at 9:41
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How do I use FileSystemObject in VBA?
...set a reference to the VB script run-time library.
The relevant file is usually located at \Windows\System32\scrrun.dll
To reference this file, load the
Visual Basic Editor (ALT+F11)
Select Tools > References from the drop-down menu
A listbox of available references will be displayed
Tick the c...
Escaping keyword-like column names in Postgres
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Some warning: Without the quotes PostgreSQL folds all identifiers to lowercase. MyTable, myTable and mytable are just the same. With the quotes this folding is not done. So "MyTable" is no more the same as mytable.
– A.H.
Oct 4 '11 at 1...
Asterisk in function call
...as input, and expands it into actual positional arguments in the function call.
So if uniqueCrossTabs was [ [ 1, 2 ], [ 3, 4 ] ], then itertools.chain(*uniqueCrossTabs) is the same as saying itertools.chain([ 1, 2 ], [ 3, 4 ])
This is obviously different from passing in just uniqueCrossTabs. In yo...
no gravity for scrollview. how to make content inside scrollview as center
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I had the same issue and finally figured it out. This is for a vertical ScrollView.
Put your ScrollView inside a RelativeLayout and center it in the RelativeLayout. In order for this to work, your ScrollView should have
android:layout_height="wrap_c...
What are namespaces?
...espacing does for functions and classes what scope does for variables. It allows you to use the same function or class name in different parts of the same program without causing a name collision.
In simple terms, think of a namespace as a person's surname. If there are two people named "John" yo...
Why is conversion from string constant to 'char*' valid in C but invalid in C++
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As of C++11, the implicit conversion that had been deprecated was officially removed, so code that depends on it (like your first example) should no longer compile.
You've noted one way to allow the code to compile: although the implicit conversion has been removed, an explicit conversion still ...
How to merge a list of lists with same type of items to a single list of items?
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Why is x => x needed for this to work? I usually see things like x = > x +1 but not x = > x.
– SwimBikeRun
Apr 18 '15 at 2:25
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