gistfile1.js

var nums = [0,0,0,0],
    n = 1000000;
var rand=function(){return parseInt(Math.random()*10)}; 
function jiaoji_count(val){
    var count = 0,a=val[0],b=val[1]; 
    for(var m = 0;m<a.length;m++){
        for(var n=0;n<b.length;n++){
            if(a[m] == b[n]){count++;b.splice(n,1);break;}}} 
    return count;
}
for(var i = 0; i<n; i++){
    var count = jiaoji_count([[rand(),rand(),rand()],[rand(),rand(),rand()]]);
    switch(count){
        case 0:nums[0]++;break;case 1:nums[1]++;break;
        case 2:nums[2]++;break;case 3:nums[3]++;
    }    
}
nums.forEach(function(val){
    console.log(val/n);
})

//结果是
//0.391813
//0.478164
//0.124926
//0.005097