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When do you use varargs in Java?
... receive an indeterminate number of objects but a varargs parameter allows more flexibility and convenience at the point of invocation. You can write code to build an array and pass it, or you can let Java do it for you when you choose to receive it in a varargs parameter.
– H2...
find -exec with multiple commands
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101
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How to determine if object is in array [duplicate]
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127
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...ted answer is by far the least performant for the provided example. Furthermore, while the groupby method is only slightly less performant, I find the duplicated method to be more readable.
Using the sample data provided:
>>> %timeit df3.reset_index().drop_duplicates(subset='index', keep='f...
How do you implement a Stack and a Queue in JavaScript?
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88
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Mongo: find items that don't have a certain field
...e), so null is kind of the exception here. Therefore, best practice is the more readable answer using $exists: false which is not ambiguous. Remember, your slightly shorter variant is not actually shorter if you need to have that comment behind it!
– Yeti
Sep 3...
Dynamic constant assignment
...rages you from assigning to them in parts of code which might get executed more than once, such as inside methods.
Under normal circumstances, you should define the constant inside the class itself:
class MyClass
MY_CONSTANT = "foo"
end
MyClass::MY_CONSTANT #=> "foo"
If for some reason tho...
vim repeat find next character 'x'
...nd next occurrence of character 'x',
but overlook that there is a word (or more words) containing 'x' in between the word I want to edit and the beginning cursor position.
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SVN+SSH, not having to do ssh-add every time? (Mac OS)
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Since macOS 10.12.2 you can use the UseKeychain option.
Read more here or look into man ssh_config.
UseKeychain
On macOS, specifies whether the system should search for passphrases in the user's keychain
when attempting to use a particular key. When the passphra...