数组转字符串,字符串转数组,对象转数组,数组转对象

╰+攻爆jí腚メ 2022-04-27 17:44 523阅读 0赞

数组转字符串

  1. var arr = [1,2,3,4,'李明','jerry'];
  2. arr.join()
  3. //"1,2,3,4,李明,jerry"
  5. arr.toString()
  6. //"1,2,3,4,李明,jerry"
  8. arr.join("")
  9. //"1234李明jerry"
  11. arr.join("-")
  12. //"1-2-3-4-李明-jerry"
  14. JSON.stringify(arr)
  15. //"[1,2,3,4,"李明","jerry"]"
  17. var x = JSON.stringify(arr)
  18. JSON.parse(x)
  19. //[1, 2, 3, 4, "李明", "jerry"]

字符串转数组

  1. var x = "1-2-3-4-李明-jerry"
  2. x.split("")
  3. //["1", "-", "2", "-", "3", "-", "4", "-", "李", "明", "-", "j", "e", "r", "r", "y"]
  4. x.split("-")
  5. //["1", "2", "3", "4", "李明", "jerry"]

对象转数组

  1. var x = { "name":"李明","age":23}

对象的键组成数组

  1. Object.keys(x)
  2. //["name", "age"]

对象的值组成数组

  1. Object.values(x)
  2. // ["李明", 23]

键值对组成的数组

  1. Object.entries(x)
  2. //[["name", "李明"],["age", 23]]

数组转对象

  1. var arr =[1, 2, 3, 4, "李明", "jerry"]
  2. { ...arr}
  3. //{0: 1, 1: 2, 2: 3, 3: 4, 4: "李明", 5: "jerry"}

发表评论

表情：
评论列表 （有 0 条评论，523人围观）

还没有评论，来说两句吧...

相关阅读