我有這個對象數(shù)組來計算另一個數(shù)組中的元素頻率，使用 for 循環(huán)打印正確的輸出。counts = {};counter = 0;counter_array = [50,50,0,200]; //this is just for example, this array is filled dynamicallyfor (var x = 0, y = counter_array.length; x < y; x++) {    counts[counter_array[x]] = (counts[counter_array[x]] || 0) + 1;}console.log('FREQUENCY: ',counts); //outputs FREQUENCY: {50:2, 0:1, 200:1}還有另一個數(shù)組數(shù)組：holder_text_array = [["a",50,0],["b",0,0]]; //example of dynamically filled arrayvar p = "a";var i = 0;while(i < holder_text_array.length){    if (holder_text_array[i][0]==p) {        var s = counts[holder_text_array[i][1]];        console.log('Element: ', holder_text_array[i][1]); //prints 50 for i = 0        console.log('frequency: ',counts[s]); //prints undefined        counter = counts[s];    }i++;}數(shù)組“holder_text_array”的數(shù)組由我需要在while循環(huán)中獲得頻率的元素組成。有人能告訴我我哪里錯了嗎？