Merge sort is a useful algorithm for sorting a list of items. It's an efficient and predictable algorithm. Inevitably it'll come up during your int...
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The merge part is useful in cases where you want to merge two sorted arrays, or find the kth element of two sorted arrays.
Yes, the merge part is useful as an independent algorithm. Knowing how these algorithms work are thus useful for constructing new algorithms.
I found the most difficult part of implementing it was actually the merge function. After that, it's almost ridiculously easy.
I admit my pseudo-code ignores some of the details, making it look easier than it is.
My
frontfunction has to deal with the end of a list and provider a proper comparison when no item is available. It can be done this way.