Object get keys and values method


Posted by Jim on 2022-09-16

Object.keys(object)

  • 回傳 object 裡所有 key 的 array
cont test = {a: 1, b: 2, c: 3};
console.log(Object.keys(test))
//output: [a, b, c]

Object.values(object)

  • 回傳 object 裡所有 value 的 array
cont test = {a: 1, b: 2, c: 3};
console.log(Object.values(test))
//output: [1, 2, 3]

Object.entries(object)

  • 回傳 object 裡所有 [key, value] 的 array
cont test = {a: 1, b: 2, c: 3};
console.log(Object.entires(test))
//output: [[a, 1], [b, 2], [c, 3]]

#javascript #object #Array







Related Posts

[Note] webpack 5 problem: Refused to execute script because its MIME type ('text/html') is not executable

[Note] webpack 5 problem: Refused to execute script because its MIME type ('text/html') is not executable

資料庫,是『必要』抑或『想要』?

資料庫,是『必要』抑或『想要』?

[JS] 浮點數精度問題

[JS] 浮點數精度問題


Comments