在javascript中需要帮助 [英] Need a help in javascript

问题描述

伙计们我在javascript中给出一个变量声明可以有人解释它的作用吗？

Guys I''m giving a variable declaration in javascript Can somebody explain what it does?

var operators = { "Add":1, "Sub":2, "Mul":3, "Div":4, "Equal":5 };

我需要了解这个变量背后的基本思路。这用于计算器。运算符意味着基本的数学运算符。

添加意味着加法等等。

我还需要知道分配给这些运算符的数字的含义是什么。是1,2,3,4,5）



我尽可能多地解释。如果你不能理解，请告诉我。

谢谢........

I need to basic idea behind this variable. This is used for a calculator. operator means basic mathematics operators.
Add means Addition and so on.
I also need to know the what is the meaning of numbers which are assign to those operators.(that are 1, 2, 3, 4, 5)

I try to explain as much as I can. If you can''t understand properly please say it to me.
Thank you........

推荐答案

它这是一个枚举声明：它定义了可以与变量一起使用的常量名称，而不是使用数字：

It''s an enum declaration: it is defining constant names you can use with the variable instead of using the numbers:

if (operator == operators.Mul)

比

is clearer than

if (operator == 3)

之后的数字冒号只指定名称将与之关联的数字。

The number after the colon just specifies the number that the name will be associated with.

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