random_test.js

<script>

/* 乱数の発生具合を調べる */
var loop = 1000000;
var rslt = new Array(50); /* 0 から (rslt.length - 1)までの乱数 */
for(var i = 0; i < loop; i++){
    /* 乱数生成 */
    var r = Math.floor(Math.random() * rslt.length);
    if(!rslt[r]){
        rslt[r] = 1;
    }else{
        rslt[r]= rslt[r] + 1;
    }
}

for(var i = 0; i < rslt.length; i++){
    if( Math.abs(rslt[i] - (loop / rslt.length)) > ((loop /rslt.length) / 10)){
        console.log("NG : rslt[" + i + "] = " + rslt[i]);
    }
    //console.log( i + " : " + rslt[i]);
}

</script>