removed pre-allocation of outputs
it doesn’t really seem to affect the performance anyway. vec.push() is pretty good
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parent
598e2cc0c5
commit
026db02c64
22
src/main.rs
22
src/main.rs
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@ -12,23 +12,11 @@ fn main() -> Result<()> {
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renames.insert(split[0].to_string(), split[1].to_string());
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}
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// get the number of lines in the file so we can pre-allocate the array
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let pf = fs::read_to_string("playlist.m3u").expect("unable to read");
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let num_lines = pf.split("\n").collect::<Vec<&str>>().len() - 1;
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let mut outputs: Vec<String> = vec![String::new(); num_lines];
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//println!("{}", num_lines);
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let mut outputs = Vec::new();
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let pls_file = File::open("playlist.m3u")?;
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let mut i = 0;
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for entry in BufReader::new(pls_file).lines() {
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let entry = entry?;
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/*
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match renames.get(&entry.to_string()) {
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Some(line) => println!("found {}", line),
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None => print!("")
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}
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*/
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let new = renames.get(&entry).unwrap_or(&entry).to_string();
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/*
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if new != &entry {
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@ -37,16 +25,10 @@ fn main() -> Result<()> {
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println!("“{}” remains unchanged", entry);
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}
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*/
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outputs[i] = new;
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i += 1;
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outputs.push(new);
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}
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/*for s in outputs {
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println!("{}", s);
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}*/
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let data = outputs.join("\n");
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fs::write("playlist2.m3u", data).expect("unable to write");
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//println!("{}", pf);
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//println!("{}", renames.get(&"a string".to_string()).unwrap());
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Ok(())
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}
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