When evaluating the following code in Emacs, I get (2 3) as the final value of x. I’d expect (1 2 3). What am I missing?
(setq x '(2 1 3))
(sort x '<)
x
When evaluating the following code in Emacs, I get (2 3) as the final
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When evaluating the following code in Emacs, I get (2 3) as the final value of x. I’d expect (1 2 3). What am I missing?
(setq x '(2 1 3))
(sort x '<)
x
If you read
sort‘s documentation, you will find that it returns the sorted list, and the input list is modified by side effects. It does not say that the argument list will contain the sorted result — It is just somehow modified by the sorting algorithm. Or, to put it shortly:sortis destructive.So, you’ll want to bind/assign
sort‘s return value: