qsort

qsort(array[,func])

:: Sorts an array array.

return

array (The same as the input; Only the elements are exchanged.)

array

array

func

function for comparison

• This function sorts an array by quick sort.
• If func is not specified, the built-in comparison function is used and the array is sorted in increasing order.
• If a function of two arguments func which returns 0, 1, or -1 is provided, then an ordering is detemined so that A<B if func(A,B)=1 holds, and the array is sorted in increasing order with respect to the ordering.
• The returned array is the same as the input. Only the elements are exchanged.

[0] qsort(newvect(10,[1,4,6,7,3,2,9,6,0,-1]));
[ -1 0 1 2 3 4 6 6 7 9 ]
[1] def rev(A,B) { return A>B?-1:(A<B?1:0); }
[2] qsort(newvect(10,[1,4,6,7,3,2,9,6,0,-1]),rev);
[ 9 7 6 6 4 3 2 1 0 -1 ]

References

section ord, section vars.

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