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pub mod error;
pub mod prelude;
pub use crate::prelude::Result;
use std::fs::File;
use std::io::BufReader;
use std::io::prelude::*;
pub fn greeting() -> Result<()> {
println!("Hello, Irenes!");
Ok(())
}
pub fn read_lines_file(filename: &str) -> Result<Vec<String>> {
let file = File::open(filename)?;
let mut reader = BufReader::new(file);
let mut buffer = String::new();
let mut input: Vec<String> = Vec::new();
loop {
reader.read_line(&mut buffer)?;
if buffer.len() == 0 {
break;
}
let mut line_copy = String::new();
line_copy.push_str(buffer.trim());
input.push(line_copy);
buffer.clear();
}
Ok(input)
}
pub fn trim_lines<'a>(lines: &'a Vec<String>) -> Vec<&str> {
let mut trimmed_lines = Vec::new();
for line in lines {
match line.strip_suffix("\n") {
Some(stripped) => {
trimmed_lines.push(stripped);
}
None => {
trimmed_lines.push(line);
}
}
}
trimmed_lines
}
pub fn group_lines_by_blanks(lines: Vec<&str>) -> Vec<Vec<&str>> {
let mut all_groups = Vec::new();
let mut current_group = Vec::new();
for line in lines {
if line.len() == 0 {
all_groups.push(current_group);
current_group = Vec::new();
} else {
current_group.push(line);
}
}
if current_group.len() > 0 {
all_groups.push(current_group);
}
all_groups
}
pub fn read_int_file(filename: &str) -> Result<Vec<i64>> {
let file = File::open(filename)?;
let mut reader = BufReader::new(file);
let mut buffer = String::new();
let mut input: Vec<i64> = Vec::new();
loop {
reader.read_line(&mut buffer)?;
if buffer.len() == 0 {
break;
}
let item = buffer.trim().parse::<i64>()?;
buffer.clear();
input.push(item);
}
Ok(input)
}
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