摘要： var arr = [3,1,2,6,7,8]; var maxNum = Math.max.apply(Math,arr); //8 var minNum = Math.min.apply(Math,arr); //1 阅读全文

摘要： 1 function selectNum(lowNum,upNum) { 2 var num = upNum-lowNum+1; 3 // Math.floor() 向下取整 4 return Math.floor(Math.random()*num+lowNum); 5 6 } 7 8 var result = selectNum(2,8); //2~8范... 阅读全文