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What is the difference between std::array and std::vector? When do you use one over other? [duplicat
... is the difference between std::array and std::vector ? When do you use one over other?
6 Answers
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How to print the contents of RDD?
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If you want to view the content of a RDD, one way is to use collect():
myRDD.collect().foreach(println)
That's not a good idea, though, when the RDD has billions of lines. Use take() to take just a few to print out:
myRDD.take(n).foreach(println)
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How is a tag different from a branch in Git? Which should I use, here?
...ing, IMHO. Especially in the way described by tvanfosson, having more than one tag with the same name across different branches could become difficult to maintain. Given the example, I would think that if you could have tags with the same name across different branches, it would quickly be establish...
Find the most common element in a list
...utions proposed, I'm amazed nobody's proposed what I'd consider an obvious one (for non-hashable but comparable elements) -- [itertools.groupby][1]. itertools offers fast, reusable functionality, and lets you delegate some tricky logic to well-tested standard library components. Consider for examp...
list.clear() vs list = new ArrayList(); [duplicate]
Which one of the 2 options is better and faster to clear an ArrayList, and why?
8 Answers
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How do I trim whitespace?
...g str.replace(" ",""). You don't need to use re, unless you have more than one space, then your example doesn't work. [] is designed to mark single characters, it's unnecessary if you're using just \s. Use either \s+ or [\s]+ (unnecessary) but [\s+] doesn't do the job, in particular if you want to r...
How to print a groupby object
...tion to previous answers:
Taking your example,
df = pd.DataFrame({'A': ['one', 'one', 'two', 'three', 'three', 'one'], 'B': range(6)})
Then simple 1 line code
df.groupby('A').apply(print)
share
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Verify object attribute value with mockito
...tance of an object on which the method will be called. My aim is to verify one of the object in method call.
11 Answers
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How to cherry pick only changes for only one file, not the whole commit
I need to apply changes introduced in one branch to another branch.
I can use cherry pick to do that. However, in my case I want to apply changes which are relevant only for one file, I don't need to cherry pick whole commit.
How to do that?
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eval command in Bash and its typical uses
...lue of the variable whose name is in this variable”, though:
echo ${!n}
one
$(…) runs the command specified inside the parentheses in a subshell (i.e. in a separate process that inherits all settings such as variable values from the current shell), and gathers its output. So echo $($n) runs $...