colsig, `:~`, %clsg

Null-terminated tuple

:~, colsig, [%clsg p=tusk] is a synthetic rune that produces a null-terminated tuple.

Produces

Twig: [%clsg p=tusk]

Sample

p is a ++tusk, a list of twigs.

Tall form

:~  i.p
    i.t.p
    i.t.t.p
==

Wide form

:~(i.p i.t.p i.t.t.p)

Irregular form

~[i.p i.t.p i.t.t.p]

Examples

/~zod/try=> :~(5 3 4 2 1)
[5 3 4 2 1 ~]
/~zod/try=> ~[5 3 4 2 1]
[5 3 4 2 1 ~]
/~zod/try=> :~  5
                3
                4
                2
                1
            ==
[5 3 4 2 1 ~]

This is the most straightforward case of :~, producing a tuple of four values in wide, irregular and tall form.

/~zod/try=> %-  flop
            %-  limo
            :~  5
                3
                4
                2
                1
                ==
~[1 2 4 3 5]

In this example we use %- to pass the results of our previous example to ++limo, which creates a ++list, and ++flop, which reverses its order. This example shows how :~ is commonly useful. Null-terminated tuples are easily converted to lists, which are frequently encountered in hoon.

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colsig, :~, %clsg