javascript - Using Both AND and OR in IF Statement - Stack Overflow

admin管理员组

文章数量:1426655

I'm working on a Google Spreadsheet adding scripts (Not formulas) and I am stuck on a problem.

I need to find a way to use something like this:

If (Product == "Shampoo" && (Box == "15" OR Box == "17"))
{
  //Do Something...
}

Basically IF the product is a shampoo and the box it belongs to is either 15 or 17 then do something. I know doing a If (Product == "Shampoo" && Box == "15" OR Box == "17") will produce unexpected or bad results. How do we go about using an OR with AND in google scripting?

From what I understand Google Scripts are based on Javascript but I can't seem to find help posts online or here in SO, all I get are solutions in formula not script.

I'm working on a Google Spreadsheet adding scripts (Not formulas) and I am stuck on a problem.

I need to find a way to use something like this:

If (Product == "Shampoo" && (Box == "15" OR Box == "17"))
{
  //Do Something...
}

Basically IF the product is a shampoo and the box it belongs to is either 15 or 17 then do something. I know doing a If (Product == "Shampoo" && Box == "15" OR Box == "17") will produce unexpected or bad results. How do we go about using an OR with AND in google scripting?

From what I understand Google Scripts are based on Javascript but I can't seem to find help posts online or here in SO, all I get are solutions in formula not script.

• javascript
• google-apps-script

Share Improve this question Follow edited Jan 9, 2018 at 18:32 Wicket 38.8k99 gold badges8080 silver badges195195 bronze badges asked Jan 9, 2018 at 14:47 JayJay 66666 gold badges1616 silver badges3131 bronze badges

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 2

First a note about the OP code

JavaScript methods are case sensitive.

Instead of IF the correct syntax is if. By the other hand the Logical OR operator is ||.

Considering the above, the OP code could be replaced by

if(Product == "Shampoo" && (Box == "15" || Box == "17"))
{
  //Do Something...
}

and

if(Product == "Shampoo" && Box == "15" || Box == "17")

Regarding the question, if (Product == "Shampoo" && Box == "15" || Box == "17") returns unexpected or bad results, this could be hard to read and lead to confusions for humans but JavaScript have very specific rules regarding how operations should be made by the engine, in this case Rhino which is used by Google Apps Script.

As was mentioned in a previous answer in this case the rule is called operator precedence but in order to make the code easier to read and to prevent confusions a good practice is to enclose each parison in parenthesis.

Considering that the Logical AND has a higher precedence than Logical OR

(Product == "Shampoo" && Box == "15" || Box == "17")

is the same as

((Product == "Shampoo" && Box == "15") || Box == "17")

References

• if..else
• Logical OR

What are you looking for is the operator precedence of the two operators logical AND && and logical OR ||.

Part of the table:

Precedence  Operator type  Associativity    Individual operators
----------  -------------  ---------------  --------------------
       6    Logical AND    left-to-right    … && …
       5    Logical OR     left-to-right    … || …

You see a higher operator precendece of logical AND over logical OR. That means you need some parenthesis for the OR statement.

本文标签： javascriptUsing Both AND and OR in IF StatementStack Overflow