Generic swap: Difference between revisions
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(swap (car lst) (cadr lst))
;; now lst is '(456 123)</syntaxhighlight>
=={{header|EMal}}==
<syntaxhighlight lang="emal">
fun swap = Pair by var a, var b do return var%var(b => a) end
int a = 1
int b = 2
writeLine("before swap: a=" + a + ", b=" + b)
Pair pair = swap(a, b)
a = pair[0]
b = pair[1]
writeLine(" after swap: a=" + a + ", b=" + b)
</syntaxhighlight>
{{out}}
<pre>
before swap: a=1, b=2
after swap: a=2, b=1
</pre>
=={{header|Erlang}}==
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