PHP, for all its warts, is pretty good on this count. There's no difference between an array and a hash (maybe I'm naive, but this seems obviously right to me), and to iterate through either you just do ...

I have a big performance problem in R. I wrote a function that iterates over a data.frame object. It simply adds a new column to a data.frame and accumulates something. (simple operation). The data.frame has roughly 850K rows. My PC is still working (about 10h now) and I have no idea about the...

I'm trying to make a program that consists of an array of 10 integers which all has a random value, so far so good. 17 Answ...

A common task in programming interviews (not from my experience of interviews though) is to take a string or an integer and list every possible permutation. ...

Is it possible to have static class variables or methods in Python? What syntax is required to do this? 21 Answers ...

I'm designing an algorithm to do the following: Given array A[1... n] , for every i < j , find all inversion pairs such that A[i] > A[j] . I'm using merge sort and copying array A to array B and then comparing the two arrays, but I'm having a difficult time seeing how I can use this to find...

In a C# (feel free to answer for other languages) loop, what's the difference between break and continue as a means to leave the structure of the loop, and go to the next iteration? ...

I was told that += can have different effects than the standard notation of i = i + . Is there a case in which i += 1 would be different from i = i + 1 ? ...

I know this might seem like an absolutely silly question to ask, yet I am too curious not to ask... 23 Answers ...

I have this script: 10 Answers 10 ...