diff options
Diffstat (limited to 'minigrep')
| -rw-r--r-- | minigrep/.gitignore | 18 | ||||
| -rw-r--r-- | minigrep/Cargo.toml | 9 | ||||
| -rw-r--r-- | minigrep/poem.txt | 9 | ||||
| -rw-r--r-- | minigrep/src/lib.rs | 97 | ||||
| -rw-r--r-- | minigrep/src/main.rs | 18 |
5 files changed, 151 insertions, 0 deletions
diff --git a/minigrep/.gitignore b/minigrep/.gitignore new file mode 100644 index 0000000..e629269 --- /dev/null +++ b/minigrep/.gitignore @@ -0,0 +1,18 @@ + +# Created by https://www.toptal.com/developers/gitignore/api/rust +# Edit at https://www.toptal.com/developers/gitignore?templates=rust + +### Rust ### +# Generated by Cargo +# will have compiled files and executables +/target/ + +# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries +# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html +Cargo.lock + +# These are backup files generated by rustfmt +**/*.rs.bk + +# End of https://www.toptal.com/developers/gitignore/api/rust + diff --git a/minigrep/Cargo.toml b/minigrep/Cargo.toml new file mode 100644 index 0000000..3fc4cdf --- /dev/null +++ b/minigrep/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "minigrep" +version = "0.1.0" +authors = ["Jordan Gong <jordan.gong@protonmail.com>"] +edition = "2018" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] diff --git a/minigrep/poem.txt b/minigrep/poem.txt new file mode 100644 index 0000000..208e35a --- /dev/null +++ b/minigrep/poem.txt @@ -0,0 +1,9 @@ +I’m nobody! Who are you? +Are you nobody, too? +Then there’s a pair of us - don’t tell! +They’d banish us, you know. + +How dreary to be somebody! +How public, like a frog +To tell your name the livelong day +To an admiring bog! diff --git a/minigrep/src/lib.rs b/minigrep/src/lib.rs new file mode 100644 index 0000000..5d5633f --- /dev/null +++ b/minigrep/src/lib.rs @@ -0,0 +1,97 @@ +use std::error::Error; +use std::fs; +use std::env; + +pub struct Config { + pub query: String, + pub filename: String, + pub case_sensitive: bool, +} + +impl Config { + pub fn new(args: &[String]) -> Result<Config, &'static str> { + if args.len() < 3 { + return Err("not enough arguments"); + } + + let query = args[1].clone(); + let filename = args[2].clone(); + + let case_sensitive = env::var("CASE_INSENSITIVE").is_err(); + + Ok(Config { + query, + filename, + case_sensitive + }) + } +} + +pub fn run(config: Config) -> Result<(), Box<dyn Error>> { + let contents = fs::read_to_string(config.filename)?; + + let results = if config.case_sensitive { + search(&config.query, &contents) + } else { + search_case_insensitive(&config.query, &contents) + }; + + for line in results { + println!("{}", line); + } + + Ok(()) +} + +pub fn search<'a>(query: &str, contents: &'a str) -> Vec<&'a str> { + let mut results = Vec::new(); + + for line in contents.lines() { + if line.contains(query) { + results.push(line); + } + } + + results +} + +pub fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> { + let query = query.to_lowercase(); + let mut results = Vec::new(); + + for line in contents.lines() { + if line.to_lowercase().contains(&query) { + results.push(line); + } + } + + results +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn case_sensitive() { + let query = "duct"; + let contents = "\ +Rust: +safe, fast, productive. +Pick three."; + + assert_eq!(vec!["safe, fast, productive."], search(query, contents)); + } + + #[test] + fn case_insensitive() { + let query = "rUsT"; + let contents = "\ +Rust: +safe, fast, productive. +Pick three. +Trust me."; + + assert_eq!(vec!["Rust:", "Trust me."], search_case_insensitive(query, contents)); + } +}
\ No newline at end of file diff --git a/minigrep/src/main.rs b/minigrep/src/main.rs new file mode 100644 index 0000000..ccdd326 --- /dev/null +++ b/minigrep/src/main.rs @@ -0,0 +1,18 @@ +use std::env; +use std::process; +use minigrep::Config; + +fn main() { + let args: Vec<String> = env::args().collect(); + + let config = Config::new(&args).unwrap_or_else(|err| { + eprintln!("Problem parsing arguments: {}", err); + process::exit(1); + }); + + if let Err(e) = minigrep::run(config) { + eprintln!("Application error: {}", e); + + process::exit(1); + } +} |