rl_lang/docs/entries/tutorial/t1/
p9.rs

1use crate::docs::entry::{ConceptCategory, ConceptEntry, DescriptionEntry, DescriptionKind};
2pub static STEP_ARRAYS: ConceptEntry = ConceptEntry {
3    name: "9. collecting data",
4    summary: "collecting data",
5    category: ConceptCategory::Types,
6    prerequisites: &[],
7    descriptions: &[
8        DescriptionEntry {
9            kind: DescriptionKind::Explanation,
10            title: None,
11            description: "an array holds multiple values of the same type in a sequence. you declare one with dec arr[type] and access elements by index starting from zero",
12            examples: &[
13                "dec arr[int] scores = [10, 20, 30]\n\nprintln(scores[0]) // 10\nprintln(scores[2]) // 30\n\nscores[1] = 99\nprintln(scores) // [10, 99, 30]",
14            ],
15            expected_output: &[],
16        },
17        DescriptionEntry {
18            kind: DescriptionKind::Explanation,
19            title: None,
20            description: "arr_push adds an element to the end and gives you back the updated array. arr_pop removes the last element. these are in std::array",
21            examples: &[
22                "get arr_push, arr_pop from std::array\n\ndec arr[int] nums = [1, 2, 3]\nnums = arr_push(nums, 4)\nprintln(nums) // [1, 2, 3, 4]\n\nnums = arr_pop(nums)\nprintln(nums) // [1, 2, 3]",
23            ],
24            expected_output: &[],
25        },
26        DescriptionEntry {
27            kind: DescriptionKind::Explanation,
28            title: None,
29            description: "len returns the number of elements in an array. arr_contains tells you if a value is in the array",
30            examples: &[
31                "get len, arr_contains from std::array\n\ndec arr[string] names = [\"ali\", \"sara\", \"omar\"]\nprintln(len(names))               // 3\nprintln(arr_contains(names, \"sara\")) // true",
32            ],
33            expected_output: &[],
34        },
35        DescriptionEntry {
36            kind: DescriptionKind::Explanation,
37            title: None,
38            description: "you can loop over an array with for ... in to visit every element",
39            examples: &[
40                "dec arr[int] guesses = [30, 60, 42]\n\nfor g in guesses {\n    println(g)\n}\n// 30\n// 60\n// 42",
41            ],
42            expected_output: &[],
43        },
44        DescriptionEntry {
45            kind: DescriptionKind::Explanation,
46            title: None,
47            description: "exercise: track every guess the player makes in an array. at the end of the game print the full guess history\n\nexpected output:\n  your guesses: [30, 60, 42]",
48            examples: &[
49                "get arr_push      from std::array\nget read_int      from std::io\nget concat        from std::str\n\ndec arr[int] guesses = []\n\n// inside your game loop, after reading a guess:\n// guesses = arr_push(guesses, guess)\n\n// after the game:\nprintln(concat(\"your guesses: \", guesses))",
50            ],
51            expected_output: &[],
52        },
53    ],
54    pitfalls: &[],
55    related: &[],
56    related_stdlib: &[],
57    since: None,
58};
rl_lang/docs/entries/tutorial/t1/p9.rs

rl_lang/docs/entries/tutorial/t1/
p9.rs
