🔁for loops

🚧 施工中

JS⟩ syntax ⟩ for loops

          enum  nonenum  sym     chain    method/operator
----------------------------------------------------------------------
in         ✅      ✅      ✅      ✅     "in" operator
for...in   ✅      ❌      ❌      ✅     loop over "keys"
for...of   ✅      ❌      ❌      ✅     loop over "values"
----------------------------------------------------------------------
keys       ✅      ❌      ❌      ❌     Object.keys()
values     ✅      ❌      ❌      ❌     Object.values()
propNames  ✅      ✅      ❌      ❌     Object.getOwnPropertyNames()
symbols    ❌      ❌      ✅      ❌     Object.getOwnPropertySymbols()
----------------------------------------------------------------------
ownKeys    ✅      ✅      ✅      ❌     Reflect.ownKeys()
descriptors        ✅      ✅      ❌     👉 See: post below*
----------------------------------------------------------------------

🔴 主題

• for loops

  • for - classic for loop

  • for-of - for value of iterable

  • for-in - for key (🚧) in object

  • for-await

• comparison of different loops

  • arr.forEach()

  • for-of vs. forEach

👥 相關

• iterable

• iteration

📘 手冊

• Loops and iteration

📗 參考

• For vs forEach() vs for/in vs for/of in JavaScript

• GeeksForGeeks ⟩ Difference between forEach and for loop in Javascript

🚧

• key