typescript-數組類型的定義

簡單的定義

const numArr:number[]=[1,2,3]
const strArr:string[]=['a','b','c']
const undeArr:undefined[]=[undefined,undefined]

數組中有字符串又有數組的類型

const arr:(number|string)[]=[1,'a',2]

數組中對象的定義

const xiaojie:{name:string,age:number}[]=[
　{name:"小妹",age:18}
]

或者用別名type

type lady={name:string,age:number}
const xiaojiejie:lady[]=[
 {name:'韓雲',age:18}   
]

用class也行

class Madam{
  name:string;
  age:number;    
}
const dajiejie:Madam[]=[]

 

 

元祖

const dajiejie:[string,string,number]=['dajiao','teach',29]