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[js] 实现0和1的排列组合 #23

Description

@VaJoy

要求:给定一个组合长度,输出由0和1在该长度内排列组合形成的二维数组。
例如:

function getArr( size ){
    //TODO - 完成该方法
}

var arr = getArr(4);  //给定组合长度为4
console.log( JSON.stringify(arr) );
/** 打印出:
[[0,0,0,0],[0,0,0,1],[0,0,1,0],[0,0,1,1],[0,1,0,0],[0,1,0,1],[0,1,1,0],[0,1,1,1],
[1,0,0,0],[1,0,0,1],[1,0,1,0],[1,0,1,1],[1,1,0,0],[1,1,0,1],[1,1,1,0],[1,1,1,1]]
****/

其实这个实现很简单的,不用想太复杂了:smile:

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