1.数组方法
let shut = [1, 2, 3, 5, 6, 7, 8, 9, 10]
shut.sort((n1, n2) => {
return n1 - n2;
})
alert(shut)
2.函数用法
let arr = (a) => {
return a * 2;
}
alert(arr(14))
3.函数参数
let arr1 = [1,2,3]
let arr2 = [4,5,6]
let arr = [...arr1,...arr2]
console.log(arr)
4.赋值用法
let [{ a, b }, [n1, n2, n3], num, arr] = [{ a: 1, b: 2, }, [4, 5, 6], 8, 'srt']
console.log(a, b, n1, n2, n3, num, arr)
5.平均数
let arr = [12, 3, 56, 45454]
let srt = arr.reduce((a, b, c) => {
if (c != arr.length - 1) {
return a + b;
} else {
return (a + b)
}
})
alert(srt)
