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Rename a class in Xcode: Refactor… is grayed out (disabled). Why?
... +1 for this. Some corners of XCode still have rough areas and this is one of them. Sometimes if saving doesn't enable refactoring, rebuilding will.
– memmons
Feb 25 '11 at 1:33
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How to check if a string contains an element from a list in Python
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this one is clever - I didn't know tuples could do that!, but it only works when your substring is anchored to one end of the string.
– Dannid
Nov 8 '16 at 17:38
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Creating an empty Pandas DataFrame, then filling it?
...ating a data frame with index x 0 dimensions (columns = []), and attaching one column in each turn of a loop. I mean df[col_name] = pandas.Series([...]) in a loop iterating through column names. In the former case, not only the memory allocation takes time, but replacing NaNs with new values seems e...
Can we instantiate an abstract class?
During one of my interview, I was asked "If we can instantiate an abstract class?"
16 Answers
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Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
...icate. Do not forget that many similar questions existed when I asked this one (see e.g. the list below). However, none of these answers solved my problem . After a long search I found a comment which had been ignored by all users pointing to the missing lib. Now, many months later, the comment h...
Difference of keywords 'typename' and 'class' in templates?
...c cases where there is a difference between typename and class.
The first one is in the case of dependent types. typename is used to declare when you are referencing a nested type that depends on another template parameter, such as the typedef in this example:
template<typename param_t>
clas...
How do Mockito matchers work?
... be free of side effects, and are generally used in assertions such as the one below.
/* Mockito */ verify(foo).setPowerLevel(gt(9000));
/* Hamcrest */ assertThat(foo.getPowerLevel(), is(greaterThan(9000)));
Mockito matchers exist, separate from Hamcrest-style matchers, so that descriptions of mat...
Scala how can I count the number of occurrences in a list
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A somewhat cleaner version of one of the other answers is:
val s = Seq("apple", "oranges", "apple", "banana", "apple", "oranges", "oranges")
s.groupBy(identity).mapValues(_.size)
giving a Map with a count for each item in the original sequence:
Map(b...
Is there any significant difference between using if/else and switch-case in C#?
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Hey, I owe you an apology. Sorry for being a bone head.
– Scott Wisniewski
Dec 28 '08 at 8:39
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What is __stdcall?
...and it must not be confused with _standard_call in that it is standard-c ! one might think that would be the point of __stdcall if one doesnt know better
– Johannes Schaub - litb
Nov 18 '08 at 2:38
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