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Fastest way to replace NAs in a large data.table
...m.time(a_gdata = f_gdata(dt1))
user system elapsed
18.805 12.301 134.985
system.time(a_andrie = f_andrie(dt1))
Error: cannot allocate vector of size 305.2 Mb
Timing stopped at: 14.541 7.764 68.285
system.time(f_dowle(dt1))
user system elapsed
7.452 4.144 19.590 # EDIT has fas...
Php multiple delimiters in explode
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answered Feb 10 '11 at 9:45
SergeSSergeS
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Counting inversions in an array
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141
So here is O(n log n) solution in java.
long merge(int[] arr, int[] left, int[] right) {
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EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
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Troy Alford
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answered May 20 '12 at 19:32
RichardRichard
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Difference between abstraction and encapsulation?
...lier:
Every function is an encapsulation; in pseudocode:
point x = { 1, 4 }
point y = { 23, 42 }
numeric d = distance(x, y)
Here, distance encapsulates the calculation of the (Euclidean) distance between two points in a plane: it hides implementation details. This is encapsulation, pure and si...
Check whether a cell contains a substring
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broc.seib
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answered Sep 4 '13 at 14:57
gwin003gwin003
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iOS / Android cross platform development [closed]
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104
Disclaimer: I work for a company, Particle Code, that makes a cross-platform framework. There ar...
Could not find com.google.android.gms:play-services:3.1.59 3.2.25 4.0.30 4.1.32 4.2.40 4.2.42 4.3.23
... place stopped working:
https://plus.google.com/+AndroidDevelopers/posts/4Yhpn6p9icf
12 Answers
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How to initialize static variables
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348
PHP can't parse non-trivial expressions in initializers.
I prefer to work around this by addin...
Does functional programming replace GoF design patterns?
...e above is a quote from the Introduction to the Design Patterns book, page 4, paragraph 3)
The main features of functional
programming include functions as
first-class values, currying,
immutable values, etc. It doesn't seem
obvious to me that OO design patterns
are approximating any o...