rpn_cli/
util.rs

1pub fn create_padding(element: char, required: usize, actual: usize, minimum: usize) -> String {
2    let count = required.checked_sub(actual).unwrap_or_default().max(minimum);
3    std::iter::repeat(element).take(count).collect()
4}
5
6pub fn remove_char(string: &str, index: usize) -> String {
7    let next = index + 1;
8    format!("{}{}", &string[..index], &string[next..])
9}
10
11#[cfg(test)]
12pub mod tests {
13    use std::io;
14    use std::io::Write;
15
16    pub struct BufferWriter {
17        pub buffer: String,
18    }
19
20    impl BufferWriter {
21        pub fn new() -> Self {
22            let buffer = String::new();
23            Self { buffer }
24        }
25    }
26
27    impl Write for BufferWriter {
28        fn write(&mut self, buffer: &[u8]) -> io::Result<usize> {
29            unsafe { self.buffer.as_mut_vec().write(buffer) }
30        }
31
32        fn flush(&mut self) -> io::Result<()> {
33            Ok(())
34        }
35    }
36}
rpn_cli/util.rs

rpn_cli/
util.rs
