1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
use std::f32::MAX as f32_max;
pub fn graph(values: &[f32]) -> String {
let ticks = "▁▂▃▄▅▆▇█";
let mut min: f32 = f32_max;
let mut max: f32 = 0.0;
for &i in values.iter() {
if i > max {
max = i;
}
if i < min {
min = i;
}
}
let ratio = if max == min {
1.0
} else {
(ticks.chars().count() - 1) as f32 / (max - min)
};
values.iter()
.cloned()
.map(|n| (n - min) * ratio)
.map(|n| n.floor() as usize)
.filter_map(|n| ticks.chars().nth(n))
.collect()
}