Shuffle (randomize) all input lines using a shuffling algorithm.
All lines in files and/or standard input are read in and written out in random order. This routine uses array shuffling, which is faster than sorting. It is a good alternative to randomizeLinesViaSort when doing unweighted shuffling (the most common case).
Input data size is limited by available memory. Disk oriented techniques are needed when data sizes are larger. For example, generating random values line-by-line (ala --gen-random-inorder) and sorting with a disk-backed sort program like GNU sort.
This routine does not support random value printing or compatibility-mode.