如果其他条件JavaScript [英] If else condition Javascript

问题描述

我的UI页面上有四个TextField.我从所有 textfields 获取用户的 input 值，例如值 Textfield1.getvalue()，Textfield2.getvalue()，Textfield3.getvalue()，Textfield4.getvalue().

I have four TextFields on my UI page.I get the input values of the user from all textfields for example values Textfield1.getvalue(),Textfield2.getvalue(),Textfield3.getvalue(),Textfield4.getvalue().

现在单击按钮，我需要检查用户实际填充了哪些文本字段，并附加这些值，我需要向服务器发送http请求以在数据库上进行查询.这些值用于过滤表中的值.因此，基本上，这些值是"TABLE COLUMN" 值.为此，我想到了使用像这样的老式组合:

Now on a button click, I need to check which textfields are actually filled by the user and attach those values I need to send a http request to the server to query on the database. These values are used to filter values from a table. SO basically the values are "TABLE COLUMN" values. For this, I thought of using old school combinations like:

if  (Textfield1.getvalue()=="" && Textfield2.getvalue()!=""){
//do something
}
else if (Textfield2.getvalue()=="" && Textfield3.getvalue()!=""){
//do something
}
else if (Textfield3.getvalue()=="" && Textfield4getvalue()!=""){
//do something
}
......

and so on.

我个人认为这不是有效的，也不是一种好的编程方式.我很确定可能会有其他方式，但我并不知道，也无法找到它.任何人都可以分享一些想法以寻求更好的解决方案.

This, I personally feel is not efficient and not a good programming way. I am pretty sure there might be some other way of doing it which I am not aware of and couldnt find googling it either. Can anyone share some ideas for a better solution.

谢谢.

推荐答案

一个想法-检查单个字段一次并合并为一个唯一值:

One idea - check individual fields once and combine into a single unique value:

var c=0;
if (condition1) c+=1;
if (condition2) c+=2;
if (condition3) c+=4;

等等.现在，条件的每种组合都有一个唯一的值与之关联，您可以使用 switch 语句来实现更简洁的流程.

Etc. now every combination of conditions has a unique value associated with it and you can use a switch statement for cleaner flow.

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