core_dev/collections/
counter.rs

1
2
3
4
5use core::fmt;
6use std::collections::HashMap;
7use std::fmt::Display;
8use std::fmt::Formatter;
9use std::fmt::Result;
10use std::hash::Hash;
11use std::str::Chars;
12
13
14
15pub struct Counter {
16    _counter_char: HashMap<char, i32>,
17    chars: bool,
18    _counter_int: HashMap<i32, i32>,
19}
20
21
22impl Counter {
23    fn create_hashmap_from_chars(_char_iter: Chars<'_>) -> HashMap<char, i32> {
24        let mut _counter = HashMap::new();
25        for _char in _char_iter {
26            *_counter.entry(_char).or_insert(0) += 1;
27        }
28        _counter
29    }
30
31    pub fn from_str(_static_string: &str) -> Counter {
32        Counter {
33            _counter_char: Counter::create_hashmap_from_chars(_static_string.chars()),
34            chars: true,
35            _counter_int: HashMap::new(),
36        }
37    }
38
39    pub fn from_string(_string: String) -> Counter {
40        Counter {
41            _counter_char: Counter::create_hashmap_from_chars(_string.chars()),
42            chars: true,
43            _counter_int: HashMap::new()
44        }
45    }
46
47    pub fn from_string_ref(_string_ref: &String) -> Counter {
48        Counter {
49            _counter_char: Counter::create_hashmap_from_chars(_string_ref.chars()),
50            chars: true,
51            _counter_int: HashMap::new()
52        }
53    }
54
55    pub fn from_i32(_i32_number: i32) -> Counter {
56        let mut __i32_number: i32 = _i32_number;
57        let mut _counter: HashMap<i32, i32> = HashMap::new();
58
59        while __i32_number != 0 {
60            let digit = __i32_number % 10;
61            *_counter.entry(digit).or_insert(0) += 1;
62            __i32_number /= 10;
63        }
64
65        Counter {
66            _counter_char: HashMap::new(),
67            chars: false,
68            _counter_int: _counter,
69        }
70    }
71}
72
73
74impl Display for Counter {
75    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
76        if self.chars {
77            write!(f, "{:?}", self._counter_char)
78        } else {
79            write!(f, "{:?}", self._counter_int)
80        }
81    }
82}
83
84// impl Iterator for Counter {
85
86//     fn next(&mut self) -> Option<> {
87//         let res = self.vals.get(self.count);
88//         match res {
89//             Some(v) => {
90//                 self.count += 1;
91//                 Some(*v)
92//             },
93//             None => None,
94//         }
95//     }
96// }
core_dev/collections/counter.rs

core_dev/collections/
counter.rs
