Thank you for your comment

Beau­tiful Racket / tuto­rials

Level up: jsonic revisited

Those who just finished the jsonic tuto­rial are ready to go. We’ll reuse the files that were already created.

Everyone else: down­load the source files from the first jsonic tuto­rial and put the enclosing jsonic direc­tory in a conve­nient loca­tion. Install this direc­tory as a package with this terminal command:

raco pkg install /path/to/jsonic
1
> raco pkg install /path/to/jsonic
copy to clipboard

Testing the setup

Once these source files are in place, we should be able to use jsonic as a language in DrRacket. For instance, if we run this source file:

jsonic-test.rkt
#lang jsonic
// a line comment
[
  @$ 'null $@,
  @$ (* 6 7) $@,
  @$ (= 2 (+ 1 1)) $@,
  @$ (list "array" "of" "strings") $@,
  @$ (hash 'key-1 'null
           'key-2 (even? 3)
           'key-3 (hash 'subkey 21)) $@
]
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
#lang jsonic
// a line comment
[
  @$ 'null $@,
  @$ (* 6 7) $@,
  @$ (= 2 (+ 1 1)) $@,
  @$ (list "array" "of" "strings") $@,
  @$ (hash 'key-1 'null
           'key-2 (even? 3)
           'key-3 (hash 'subkey 21)) $@
]
copy to clipboard

We should get this result:

[
  null,
  42,
  true,
  ["array","of","strings"],
  {"key-1":null,"key-3":{"subkey":21},"key-2":false}
]
1
2
3
4
5
6
7
[
  null,
  42,
  true,
  ["array","of","strings"],
  {"key-1":null,"key-3":{"subkey":21},"key-2":false}
]
copy to clipboard

If so, the language is set up correctly. We can continue.

← prev next →