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How to quit scala 2.11.0 REPL?
...can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
5 Answers
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What is the difference between MVC and MVVM? [closed]
...
MVC/MVVM is not an either/or choice.
The two patterns crop up, in different ways, in both ASP.Net and Silverlight/WPF development.
For ASP.Net, MVVM is used to two-way bind data within views. This is usually a client-side implementation (e.g. using Kn...
C++11 rvalues and move semantics confusion (return statement)
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First example
std::vector<int> return_vector(void)
{
std::vector<int> tmp {1,2,3,4,5};
return tmp;
}
std::vector<int> &&rval_ref = return_vector();
The first example returns a temporary which is caught by rval_re...
How to hide Soft Keyboard when activity starts
...eKeyboard()
}
How to show soft keyboard
fun Context.showKeyboard() { // Or View.showKeyboard()
val inputMethodManager = context.getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager
inputMethodManager.toggleSoftInput(SHOW_FORCED, HIDE_IMPLICIT_ONLY)
}
Simpler method when simultan...
Why can't the C# constructor infer type?
Why is type inference not supported for constructors the way it is for generic methods?
5 Answers
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What's the role of GetHashCode in the IEqualityComparer in .NET?
...teger representation of the object. Since there is no limit to how much information an object can contain, certain hash codes are shared by multiple objects - so the hash code is not necessarily unique.
A dictionary is a really cool data structure that trades a higher memory footprint in return fo...
Why does Environment.Exit() not terminate the program any more?
...rough Windows Update solved the problem. The noticeable 2 second delay before the crash is no longer present, strongly suggesting that the IsWindow() deadlock got solved. And the program shuts down cleanly and reliably. The update installed patches for Windows Defender, wdboot.sys, wdfilter.sys, ...
Comparing boxed Long values 127 and 128
...if conditions. When these values are less than 128 , the if condition works properly, but when they are greater than or equal to 128 , comparison fails.
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Is there a short contains function for lists?
... this syntax:
if myItem in list:
# do something
Also, inverse operator:
if myItem not in list:
# do something
It's work fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
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Python group by
..., ('5594916', 'ETH'), ('1550003', 'ETH')]
>>> from collections import defaultdict
>>> res = defaultdict(list)
>>> for v, k in input: res[k].append(v)
...
Then, convert that dictionary into the expected format.
>>> [{'type':k, 'items':v} for k,v in res.items()]
...