I am cannot applying

[ghost]

((1 2 3) (dup *) map) =>

or

((1 2 3) (dup *) map) apply

Result are:

(!) <repl>(1,20) [map]: Incorrect values found on the stack:
- expected: quot quot map
- got:      int map
    <repl>(1,20) in symbol: map
    <repl>(1,27) in symbol: apply

[h3rald]

You don't need apply... map is enough for what you are doing:

 ; pushes (1 4 9) on the stack
 (1 2 3) (dup *) map

[ghost]

You don't need apply... map is enough for what you are doing:

 ; pushes (1 4 9) on the stack
 (1 2 3) (dup *) map

I know i don't need apply but um... why isn't apply working?

(1 2 +) apply ; -> (3)
(4 3 -) apply ; -> (1)
((1 2 3) (dup *) map) apply ; -> error
((1 2 3) (dup *) map) => ; -> error

[h3rald]

Well... apply works by evaluating each item in the quotation in a separate stack.

So here's what happens:

• a new stack is created
• (1 2 3) is evaluated, so 1, 2, and 3 are pushed on the stack:
  • stack: 1
  • stack: 1 2
  • stack: 1 2 3
• (dup *) is evaluated so dup and * are pushed on the stack:
  • stack: 1 2 3 3
  • stack: 1 2 9
• finally, map is pushed on the stack:
  • stack:

    
    (!) <repl>(1,20) [map]: Incorrect values found on the stack:

  • expected: quot quot map
  • got: int map

It's like writing 1 2 9 map, which of course doesn't make much sense.

apply is typically useful to evaluate symbols within a quotation:

1 :a
2 :b
3 :c

(a b c) apply ;outputs (1 2 3)

If you simply want to dequote the outer quotation, use dequote or ->: quotation:

((1 2 3) (dup *) map) ->
; outputs: (1 4 9)

[ghost]

Well... apply works by evaluating each item in the quotation in a separate stack.

So here's what happens:

• a new stack is created

• (1 2 3) is evaluated, so 1, 2, and 3 are pushed on the stack:

  • stack: 1
  • stack: 1 2
  • stack: 1 2 3

• (dup *) is evaluated so dup and * are pushed on the stack:

  • stack: 1 2 3 3
  • stack: 1 2 9

• finally, map is pushed on the stack:

  • stack:

    
    (!) <repl>(1,20) [map]: Incorrect values found on the stack:

  • expected: quot quot map
  • got: int map

It's like writing 1 2 9 map, which of course doesn't make much sense.

apply is typically useful to evaluate symbols within a quotation:

1 :a
2 :b
3 :c

(a b c) apply ;outputs (1 2 3)

If you simply want to dequote the outer quotation, use dequote or ->: quotation:

((1 2 3) (dup *) map) ->
; outputs: (1 4 9)

I was playing with the builtin symbols of min v0.3.0 and then i found your (1 2 3 4 5) (dup *) map example. I decided to try it within quotes. After that, i got this error that i presented it to you for solving it. Exactly, symbols are very confusy things.

But thanks so much!