🔰array-like

JS ⟩ object ⟩ built-in ⟩ Array ⟩ array-like

objects that have indexes and length.

🔴 主題

• array-likes：

  • touchEvent.touches (TouchList)

  • the "arguments" object

  • String

👥 相關

• array-like and iterable are different things.

💈範例

let arrayLike = { 
  0: "Hello",    // has indexes
  1: "World",
  length: 2,     // has length
}

💾 replit：string is array-like

// ⭐️ string is array-like
const str = 'abc'; 
str.length,       // 3   (string has length)
str[0],           // 'a' (string has numeric indexes)

📗 參考

• JS.info ⟩ iterables

📘 手冊

• Array.from() - convert iterable/array-like to Array.