In C (or C++ for that matter), pointers are special if they have the value zero: I am adviced to set pointers to zero after freeing their memory, because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use ...

How can I round a decimal number (floating point) to the nearest integer? 13 Answers ...

I have two ggplots which I align horizontally with grid.arrange . I have looked through a lot of forum posts, but everything I try seem to be commands that are now updated and named something else. ...

I can easily grant access to one IP using this code: 7 Answers 7 ...

How does this delete trick with the append function work? 6 Answers 6 ...

I don't understand the rationale behind the decision of this part of Lua. Why does indexing start at 1? I have read (as many others did) this great paper . It seems to me a strange corner of a language that is very pleasant to learn and program. Don't get me wrong, Lua is just great but there has t...

I am struggling to find the appropriate function that would return a specified number of rows picked up randomly without replacement from a data frame in R language? Can anyone help me out? ...

Most operations in pandas can be accomplished with operator chaining ( groupby , aggregate , apply , etc), but the only way I've found to filter rows is via normal bracket indexing ...

I am builing my numpy/scipy environment based on blas and lapack more or less based on this walk through. 5 Answers ...

What is the difference between a single precision floating point operation and double precision floating operation? 11 Answ...