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How do I call one constructor from another in Java?
... constructor from another (within the same class, not from a subclass)? If yes how? And what could be the best way to call another constructor (if there are several ways to do it)?
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Update a dataframe in pandas while iterating row by row
I have a pandas data frame that looks like this (its a pretty big one)
8 Answers
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How to generate a random string in Ruby
I'm currently generating an 8-character pseudo-random uppercase string for "A" .. "Z":
50 Answers
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What is the difference between save and insert in Mongo DB?
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Save Vs Insert :
In your given examples, the behavior is essentially the same.
save behaves differently if it is passed with an "_id" parameter.
For save, If the document contains _id, it will upsert querying the collection on the _id field, If ...
Why do people still use primitive types in Java?
Since Java 5, we've had boxing/unboxing of primitive types so that int is wrapped to be java.lang.Integer , and so and and so forth.
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Convert a number range to another range, maintaining ratio
I'm trying to convert one range of numbers to another, maintaining ratio. Maths is not my strong point.
18 Answers
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Lambda function in list comprehensions
Why is the output of the following two list comprehensions different, even though f and the lambda function are the same?
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Paste in insert mode?
...e clipboard
CTRL-R " (the unnamed register) inserts the last delete or yank.
To find this in vim's help type :h i_ctrl-r
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Clean code to printf size_t in C++ (or: Nearest equivalent of C99's %z in C++)
...nd ptrdiff_t arguments, Visual C++ for instance use %Iu and %Id respectively, I think that gcc will allow you to use %zu and %zd.
You could create a macro:
#if defined(_MSC_VER) || defined(__MINGW32__) //__MINGW32__ should goes before __GNUC__
#define JL_SIZE_T_SPECIFIER "%Iu"
#define JL_SS...
xcopy file, rename, suppress “Does xxx specify a file name…” message
This seems pretty simple and maybe I'm just overlooking the proper flag , but how would I, in one command, copy a file from one directory to another and rename it in the destination directory? Here's my command:
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