トッカンソフトウェア

TypeScript 基本

変数宣言、if文

				

let cnt: number = 3;
let str: string = 'Hello';
let bool: boolean = false;
let etc: any = 'World';

for (let i = 0; i < cnt; i++) {
    if (i == 0) {
        console.log(str);
        bool = true;
    } else if (bool) {
        console.log(etc);
        bool = false;
    } else {
        console.log(i);
    }
}


			

配列

				
let ary1: string[] = [];
let ary2: string[] = new Array();
let ary3: string[] = ["one", "two", "three"];

for (let val of ary3) {
    console.log("of:" + val);
}

			

マップ

				
// 空のマップ
const map1 = new Map<string, string>();

map1.set('aaa', 'bbb');
// map1.set('ccc', 'ddd');

for (const [key, value] of map1) {
    console.log(key + ' = ' + value);
}