如何将几个数字进行搭配相加，得出指定区间的组合

function getCorrectCombination(max,min,arr){var l = arr.length,result = [],t = '';while(l) {t += 1;l--;}t = parseInt(t,2);for (var i=1; i <= t; i++) {var m = i.toString(2),p = 0,a = [];for (var j=0; j < m.length; j++) {if(m[j] === '1') {p += arr[j];a.push(arr[j])}};if (p >= min && p <= min) result.push(a);};return result;}