Selecting every nth item from an array

Question

What would be the most efficient way to select every nth item from a large array? Is there a \'smart\' way to do it or is looping the only way?

Some points to c

Answer 1

• Create a two dimentional array [205][N]
• Load data into array
• Access 205th element for every N

May sound silly but by definition it is fastest since you access memory locations directly and do not perform any comparisons.