1 let myName:string[] = ["wei","ze","yang"];                                        
2 let myAge:number[] = [21,22,23];                                                 
3 let student:any[] = ["wei",23,true];                                                           

1 let student:[string,number,boolean];
2 student[0] = "weizeyang";
3 student[1] = 22;
4 
5 // 也不影响对象类型的方法使用
6 student[0].slice(1);
7 student[1].toFixed(2);

1 let student1:[string,number,boolean] = ["weizeyang",22,true];
2 
3 // 但是这个时候就要注意了不可以少赋值
4 let student2:[string,number,boolean] = ["weizeyang",22];
5 // Error : Type '[string, number]' is not assignable to type '[string, number, boolean]'.
6 // Erroe : Property '2' is missing in type '[string, number]'.

1 let student1:[string,number];
2 student1 = ["weizeyang",22,"女"];
3 
4 // 这时需要注意
5 // 当赋值给越界的元素时，它类型会被限制为元组中每个类型的联合类型
6 
7 let student2:[string,number];
8 student2 = ["weizeyang",22,true];
9 // Error : Type '[string, number, boolean]' is not assignable to type '[string, number]'.

1 let student1:[string,number];
2 student1 = ["weizeyang",22,"女孩儿"];
3 
4 // 这时虽然赋值成功了，但是其方法使用时依然是
5 
6 student1[2].slice(1);
7 // Error : Property 'slice' does not exist on type 'string | number'.

1 let student1:[string,number];
2 student1 = ["weizeyang",22,"女孩儿"];
3 
4 (<string>student1[2]).slice(1);  // 孩儿