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Qt c++ aggregate 'std::stringstream ss' has incomplete type and cannot be defined
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Luchian GrigoreLuchian Grigore
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add a...
Using try vs if in python
... faster if exceptions really are exceptional. If result is None more than 50 % of the time, then using if is probably better.
To support this with a few measurements:
>>> import timeit
>>> timeit.timeit(setup="a=1;b=1", stmt="a/b") # no error checking
0.06379691968322732
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encryption/decryption with multiple keys
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answered Feb 28 '09 at 0:34
David SegondsDavid Segonds
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GROUP_CONCAT ORDER BY
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edited Feb 16 '16 at 9:20
answered Dec 25 '11 at 19:51
al...
What does “abstract over” mean?
... numbers under a single symbol ns:
def sumOf(ns: List[Int]) = ns.foldLeft(0)(_ + _)
And we don't particularly care that it's a List either. List is a specific type constructor (takes a type and returns a type), but we can abstract over the type constructor by specifying which essential characteri...
How do you do natural logs (e.g. “ln()”) with numpy in Python?
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np.log is ln, whereas np.log10 is your standard base 10 log.
Relevant documentation:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.log.html
http://docs.scipy.org/doc/numpy/reference/generated/numpy.log10.html
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How to detect UI thread on Android?
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200
Common practice to determine the UI Thread's identity is via Looper#getMainLooper:
if (Looper....
Default visibility of class methods in PHP
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edited Feb 8 '10 at 19:55
Anthony Forloney
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Using a ListAdapter to fill a LinearLayout inside a ScrollView layout
... Your adapter.
final int adapterCount = adapter.getCount();
for (int i = 0; i < adapterCount; i++) {
View item = adapter.getView(i, null, null);
layout.addView(item);
}
EDIT: I rejected this approach when I needed to display about 200 non-trivial list items, it is very slow - Nexus 4 need...
How to replace an entire line in a text file by line number
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10
For me it says: sed: -e expression #1, char 26: unknown option to ``s' and my line is: sed -i '7s/.*/<param-value>http://localhost:808...