Zhentiw - 博客园

2024年4月8日

[React] For sync code initialise state, you don't need useEffect

摘要： Here is a component which doesn't need to use useEffect export function LocalTodos() { const [todos, setTodos] = useState([]) useEffect(() => { const 阅读全文

posted @ 2024-04-08 14:54 Zhentiw 阅读(21) 评论(0) 推荐(0)

[React] Using key prop to reset component to avoid useEffect hook

摘要： The component using useEffect which is not necessary: function TopicEditor({ selectedTopicId }) { const [enteredNote, setEnteredNote] = useState(''); 阅读全文

posted @ 2024-04-08 14:49 Zhentiw 阅读(17) 评论(0) 推荐(0)

[Rust] Slice and Vec metadata

摘要： struct VecMetadata { first_elem_index: usize, length: usize, capacity: usize } struct SliceMetadata { first_elem_index: usize, length: usize } Slice i 阅读全文

posted @ 2024-04-08 14:20 Zhentiw 阅读(40) 评论(0) 推荐(0)

[Rust] Ownership

摘要： The following code will have borrowing problem fn print_years(years: Vec<i32>) { for year in years.iter() { println!("Year: {}", year); } } // dealloc 阅读全文

posted @ 2024-04-08 01:24 Zhentiw 阅读(19) 评论(0) 推荐(0)

2024年4月7日

[Typescript] @freeze decorator

摘要： function freeze(config?: { unless: () => boolean }) { return function(target: any, propertyKey: string) { let value: any; const getter = function () { 阅读全文

posted @ 2024-04-07 17:14 Zhentiw 阅读(28) 评论(0) 推荐(0)

2024年4月3日

[Rust] Dealing with Vec modification

摘要： Mutate the Vec: fn vec_loop(mut v: Vec<i32>) -> Vec<i32> { for element in v.iter_mut() { // Fill this up so that each element in the Vec `v` is // mul 阅读全文

posted @ 2024-04-03 02:20 Zhentiw 阅读(38) 评论(0) 推荐(0)

2024年3月26日

[Javascript] Array.prototype.with Immutable replace element inside array

摘要： Intro to Array.prototype.with(index, value) const ages = [10, 15, 20, 25]; const newAges = ages.with(1, 16); console.log(newAges); // [10, 16, 20, 25] 阅读全文

posted @ 2024-03-26 15:28 Zhentiw 阅读(9) 评论(0) 推荐(0)

2024年3月23日

[Rust] Traits

摘要： Example 1: trait AppendBar { fn append_bar(self) -> Self; } impl AppendBar for String { fn append_bar(mut self) -> Self { self.push_str("Bar"); return 阅读全文

posted @ 2024-03-23 17:47 Zhentiw 阅读(24) 评论(0) 推荐(0)

[Rust] Generic

摘要： Example 1: fn main() { let mut shopping_list: Vec<&str> = Vec::new(); shopping_list.push("milk"); } Example 2: struct Wrapper<T> { value: T, } impl<T> 阅读全文

posted @ 2024-03-23 17:18 Zhentiw 阅读(24) 评论(0) 推荐(0)

2024年3月22日

[Rust] Iter

摘要： A baisc iter: #[test] fn main() { let my_fav_fruits = vec!["banana", "custard apple", "avocado", "peach", "raspberry"]; let mut my_iterable_fav_fruits 阅读全文

posted @ 2024-03-22 16:10 Zhentiw 阅读(53) 评论(0) 推荐(0)

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