檢視 Rust筆記的原始碼

{{Nav|程式語言、邏輯學}}

=Programming Rust筆記=
參見：[[Programming Rust筆記]]

=其他=
==套件管理==
===cargo===
====加入新函式庫====
<code>cargo add csv</code>

==編輯器==
===Emacs===
* [https://github.com/rust-lang/rust-mode rust-mode]
** C-c C-c C-r：跑程式
** C-c C-f：改善排版，要先裝rustfmt
==型別==
===函數===
===struct===
<pre>
struct Aminal {
    species: String,
    name: String,
    weight: u64,
}
</pre>


===資料結構===
* [https://oooutlk.github.io/trees/crud.html 樹的使用函式庫] Apache License 2.0/MIT

==函數==
# 得到 UTF-8 字串長度的方法：[https://docs.rs/unicode-segmentation/1.6.0/unicode_segmentation/index.html UnicodeSegmentation::graphemes]（參見：[https://stackoverflow.com/questions/46290655/get-the-string-length-in-characters-in-rust Stack Overflow]）
# [https://stackoverflow.com/questions/45519176/how-do-i-use-or-import-a-local-rust-file 匯入外部函式庫]

===印出當前目錄(current directory)===
<pre>
use std::env;
...
    println!("{:?}", env::current_dir());
</pre>
執行結果：
<code>Ok("[project_dir]")</code>

===sysargv 傳入程式的引數===

求出引數個數長度，沒輸入自定引數則為0：
<pre>
use std::env;
...
    println!("{}", env::args().len());
</pre>

==變數==
# [https://www.educative.io/edpresso/how-to-use-references-in-rust 使用參照的方法]
#: <code>foo (x : &mut i64){...}</code>
# [https://stackoverflow.com/questions/30154541/how-do-i-concatenate-strings 連結字串]
#: <code>let concat_str = format!("{}{}", str1, str2);</code>

==字串==
# 獲得子字串：<code>a = a[..1].to_string();</code>

==食譜 (Cookbook)==
===子目錄的item用for遍歷，轉成字串===
<pre>
    let corpus_CSV_paths = fs::read_dir("./corpus").unwrap();
    for path in corpus_CSV_paths {
       let path_string = format!("{:?}", path.unwrap().path());
    }
</pre>

===讀檔案顯示資料===
摘自：https://doc.rust-lang.org/book/ch12-02-reading-a-file.html
<pre>
let contents = fs::read_to_string(file_path)
        .expect("Should have been able to read the file");

    println!("With text:\n{contents}");</pre>

==函式庫==
=== Gtk4 ===
# [[Grid於Rust的Gtk4 binding]]

[[category:資訊]]