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How do I use a PriorityQueue?
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455
Use the constructor overload which takes a Comparator<? super E> comparator and pass in a...
How to apply a function to two columns of Pandas dataframe
...n [49]: df
Out[49]:
0 1
0 1.000000 0.000000
1 -0.494375 0.570994
2 1.000000 0.000000
3 1.876360 -0.229738
4 1.000000 0.000000
In [50]: def f(x):
....: return x[0] + x[1]
....:
In [51]: df.apply(f, axis=1) #passes a Series object, row-wise
Out[51]:
0 1....
What is the difference between the different methods of putting JavaScript code in an ?
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answered Oct 29 '08 at 5:35
cowgodcowgod
8,19644 gold badges3737 silver badges5555 bronze badges
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Dictionaries and default values
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edited Jan 23 '19 at 5:30
Solomon Ucko
2,42022 gold badges1212 silver badges2727 bronze badges
answ...
How to check an Android device is HDPI screen or MDPI screen?
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density = getResources().getDisplayMetrics().density;
// return 0.75 if it's LDPI
// return 1.0 if it's MDPI
// return 1.5 if it's HDPI
// return 2.0 if it's XHDPI
// return 3.0 if it's XXHDPI
// return 4.0 if it's XXXHDPI
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Integer division: How do you produce a double?
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double num = 5;
That avoids a cast. But you'll find that the cast conversions are well-defined. You don't have to guess, just check the JLS. int to double is a widening conversion. From §5.1.2:
Widening primitive conversions do...
Is 'switch' faster than 'if'?
... void call<4u>() # TAILCALL
jmp void call<5u>() # TAILCALL
jmp void call<6u>() # TAILCALL
jmp void call<7u>() # TAILCALL
jmp void call<8u>() # TAILCALL
jmp void call&...
Initializing a static std::map in C++
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635
Using C++11:
#include <map>
using namespace std;
map<int, char> m = {{1, 'a'}, {3,...
Most concise way to convert a Set to a List
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answered Feb 23 '10 at 15:56
SchildmeijerSchildmeijer
19.6k1010 gold badges5757 silver badges7878 bronze badges
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