[解构赋值-05]字符串&布尔值的结构赋值

#字符串的结构赋值

const str = 'I am the bone of my sword'; // 我是剑骨头

我们可以用数组的解构赋值来对字符串进行结构赋值。

所以变量的取值需要位置决定

//这样我们就得到
//a = "I"
//b = " "
//c = a
const [ a, b ,c] = str;

同样，我们可以用到扩展运算符

//扩展运算符会把剩余的字符组成为一个数组赋值给oth
//["m", " ", "t", "h", "e", " ", "b", "o", "n", "e", " ", "o", "f", " ", "m", "y", " ", "s", "w", "o", "r", "d"]
const [ a, b ,c, ...oth ] = str;

运用

1. 分解字符串

这三种方式得到的结果一样
const [ ...spStr1 ] = str;
const spStr2 = str.split('');
//扩展运算符合并数组的方式再赋值给变量spStr3
const spStr3 = [ ...str ];

2. 提取字符串的属性和方法

//取字符串的length属性和split方法
const { length, split } = str;

const { length, split } = str;