F# – merge sort on array

Here’s a sim­ple F# imple­men­ta­tion of the merge sort algo­rithm (using muta­ble arrays) out­lined in the Algo­rithms : Design and Analy­sis Part 1 course on Cours­era.

So refresh­ing to be writ­ing sim­ple sort­ing algo­rithms years after uni­ver­si­ty, still fun! Open-mouthed smile