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<syntaxhighlight lang="langur">val .select = impure fn(.entries) {

if entries is not .entrieslist: returnthrow "invalid args"

writeln join ("\n", map(fn .e, .i: "{{.i:2}}: {{.e}}", .entries, 1..len .(entries)))

val .idx = number read(

fn(.x) {

if not .x -> RE/^[0-9]+$/: return false

val .y = number .x -> number

.y > 0 and .y <= len(.entries)

) -> number

.entries[.idx]

writeln .selectchoose(["fee fie", "eat pi", "huff and puff", "tick tock"])