Typescript

Typescript 数组&元组&枚举类型

Typescript 數組

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//數組

let names: Array<string>=[ "henry" ,"bucky"];
console.log( names[0] )
names[0]='hello';//可以覆值同是string 的型別

//以下兩種相同
let numbers:Array <number>=[1 ,2];
let numbers:  number [] =[1 ,2];

Typescript 元組

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let color:[ string,number ]=[ 'Hi',99 ];

Typescript enum:枚舉

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enum color {
    Black, //0
    Yellow, //1
    Red, //2
}

let myColor : color =Color.Yellow;
console.log( myColor ) //1

enum color {
Black, //0
Yellow=100, //100
Red, //101
}