In the 'own solutions' department, have a look also at qtNaturalSort, which I wrote as a Qt-API improvement over a different (not QCollator) algorithm. That said, I believe QCollator works generally well (again, in that it doesn't 'really' work, but it succeeds within the constraints that are generally accepted). (Fortunately, the OP's problem would appear to already satisfy the usual set of constraints.) 'Solving' this problem requires constraining it deciding we're only going to handle specific cases, and anything outside of those bounds is just going to produce a 'wrong' answer. '1.5'? (Hint: the last depends on if those are decimal numbers or semantic version numbers.) For instance, if I have a bunch of file names with mixed numbers and letters, and some parts of those names happen to match, is that a hexadecimal number? Is '1,500' the same as '1500', or are '1' and '500' individual numbers? Does '7' come before or after '6'? What about '1.21' vs. 'Correct' natural sorting depends on context that - short of 'true' artificial intelligence - is virtually impossible to have. This isn't an answer to the question as such, but some general information for the benefit of others that stumble across this trying to figure out how to 'sort naturally'.įirst off: it's impossible.

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