console 命令行工具 X clear

console

// reduce 数组扁平化

var arr = [1,2,3,[5,4,3,4,[1,3,45]],89]
const fun = (data) => {
    return data.reduce((pre, cur) => {
      return  pre.concat(Array.isArray(cur) ? fun(cur) : cur)
    }, [])
}

console.log(fun(arr))


// es6 flat

console.log(arr.flat(Infinity))

//JSON

console.log(JSON.stringify(arr).replace(/\[|\]/g, '').split(','))

<!DOCTYPE html>
<html lang="en">
<head>
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	<title>reduce</title>
</head>
<body>
	
</body>
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