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Inheriting constructors
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@Mikhail: Both clang and g++ should now support inheriting constructors: clang.llvm.org/cxx_status.html gcc.gnu.org/projects/cxx0x.html ...
How to convert a data frame column to numeric type?
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277
Since (still) nobody got check-mark, I assume that you have some practical issue in mind, mostl...
Booleans, conditional operators and autoboxing
...result of applying capture conversion (§5.1.10) to lub(T1, T2) (§15.12.2.7).
S1 == <special null type> (see §4.1)
S2 == boolean
T1 == box(S1) == <special null type> (see last item in list of boxing conversions in §5.1.7)
T2 == box(S2) == `Boolean
lub(T1, T2) == Boolean
So the t...
pandas: filter rows of DataFrame with operator chaining
... A B C D
a 1 4 9 1
b 4 5 0 2
c 5 5 1 0
d 1 3 9 6
In [97]: df.mask('A', 1)
Out[97]:
A B C D
a 1 4 9 1
d 1 3 9 6
In [98]: df.mask('A', 1).mask('D', 6)
Out[98]:
A B C D
d 1 3 9 6
s...
No resource found - Theme.AppCompat.Light.DarkActionBar
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17 Answers
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Active
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Rails find_or_create_by more than one attribute?
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467
Multiple attributes can be connected with an and:
GroupMember.find_or_create_by_member_id_and_g...
How to change Navigation Bar color in iOS 7?
How do I change the Navigation Bar color in iOS 7?
18 Answers
18
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Boolean.hashCode()
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1231 and 1237 are just two (sufficiently large) arbitrary prime numbers. Any other two large prime numbers would do fine.
Why primes?
Suppose for a second that we picked composite numbers (non-primes), say 1000 and 2000. When inserting ...
Setting a system environment variable from a Windows batch file?
... environment variable at the system level from a command prompt in Windows 7 (or even XP for that matter). I am running from an elevated command prompt.
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Do Swift-based applications work on OS X 10.9/iOS 7 and lower?
Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?
19 Answers
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