javascript - 不使用数组检测具有最大值的变量？

Question

我需要找到哪个变量具有最大值。

通常我会做这样的事情:

var Dimensions = [Height, Length, Depth];

var biggestSide = Math.max.apply(Math, Dimensions);

但在此之后我需要对变量做一些事情。

是否有办法在不使用数组或一系列 if 语句的情况下识别具有最大值的 var？

Answer 1

您可以使用switch声明

var biggestSide = Math.max(Height, Length, Depth);

switch (biggestSide) {
     case Height:
         ...
         break;
     case Length:
         ...
         break;
     case Depth:
         ...
         break;
}

阅读您的评论后:

@mplungjan - in brief, the vars Height, Length and Width and the max values from arrays themselves. I need to identify the array that has the largest value so I can do something with the vars that are pushed to that array. – MeltingDog

我认为这样的事情就是你所追求的

var maxHeight = Math.max.apply(Math, Height);
var maxLength = Math.max.apply(Math, Length);
var maxDepth = Math.max.apply(Math, Depth);

var biggestSide = Math.max(maxHeight, maxLength, maxDepth);

switch (biggestSide) {
     case maxHeight:
         // Do something with Height
         break;
     case maxLength:
         // Do something with Length
         break;
     case maxDepth:
         // Do something with Depth
         break;
}

注意，对于 ES6，您可以使用 spread operator而不是应用函数:

var maxHeight = Math.max(...Height);