typescript-数组类型的定义

简单的定义

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

数组中有字符串又有数组的类型

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

数组中对象的定义

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

或者用别名type

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