${(o)…}: Sort in ascending order

(o) sorts in ascending order. It’s the default sort order of flags a, i, n, and -.

O is the opposite and sets descending sort order.

Links

• Zsh manual on parameter expansion flags

Examples

Lexical, case-sensitive sorting in ascending order

1 2	declare data=(z X A a) echo "Sorted with default settings: " ${(o)data}

Output:

1	Sorted with default settings: a A X z