javascript - Why is this 2d array pushing values when it shouldn't? -

edited: pointing out oblivious mistake temprndnumber being reset in inner loop. i'm still seeing "," characters show in array though.

i want create 2d array gets populated when random number meets particular criteria (rnd >= 7). following code populates 2d array combination of "," , numbers meets criteria.

var tempallrndnumbers = [];     (var = 0; < 10; i++) {         (var j = 0; j < 10; j++) {             var temprndnumber = [];             var rndnumber = math.floor(math.random() * 10);             if (rndnumber >= 7) {                 temprndnumber.push(rndnumber);             }         }         tempallrndnumbers.push(temprndnumber);     } 

tempallrndnumbers should populated numbers 7 , above, right? instead, i'm getting 2d array full of "," , numbers 7 , above.

since reset temprndnumber empty array on each iteration of j loop, contain number if last iteration >= 7. move initialization outside of innermost loop:

var tempallrndnumbers = [];     (var = 0; < 10; i++) {         var temprndnumber = [];         (var j = 0; j < 10; {             var rndnumber = math.floor(math.random() * 10);             if (rndnumber >= 7) {                 temprndnumber.push(rndnumber);             }         }         tempallrndnumbers.push(temprndnumber);     }