学习ES6--data2
变量的解构:
let [a, b, c] = [1, 2, 3]
等号左边的值等于等号右边的值,一一对应。假如右边没有相对应的值,如
let [a, b, c] = [1, 2, ]
这时候,c = undefined
还有一个
let [a, b, c, d, e] = "Hello" a = "H" b = "e" c = "l" d = "l" e = "o"
此时等号右边的字符串转为数组进行结构
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