Nested function: Difference between revisions

=={{header|RPL}}==

===Fully compliant===

The outer function creates the inner function, then deletes it at its last execution step.

The <code>\n</code> substring must be replaced by a <code>Newline</code> character when typing the code.

≪

≪ + OVER →STR SWAP + ROT SWAP + SWAP 1 + ≫ ''''MakeItem'''' STO

"" 1

3 PICK "first\n" '''MakeItem''' 3 PICK "second\n" '''MakeItem''' 3 PICK "third\n" '''MakeItem'''

DROP SWAP DROP

''''MakeItem'''' PURGE

≫

‘'''MakeList'''’ STO

". " '''MakeList'''

{{out}}

<pre>

1: "1. first

2. second

3. third"

</pre>

===Unnamed nested functions===

It is more idiomatic in RPL to use unnamed nested functions, which allows the use of local variables and then increases code readability.

≪ "" 1

1 3 '''FOR''' j

3 PICK { "first\n" "second\n" "third\n" } j GET

→ sep item ≪ DUP →STR sep + item + ROT SWAP + SWAP 1 + ≫

'''NEXT'''

DROP SWAP DROP

≫