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JavaScript DOM Scripting By Example Improving the Application Code Refactor 2: Readable Branching Logic

Vic Mercier
Vic Mercier
3,276 Points
Posted by Vic Mercier
Vic Mercier
3,276 Points

Which method should I use in object . vs []

Why couldn't I do that: namesActions.action() instead of namesActionsaction;

What is the difference between both and when should I use one instead of the other.

I mean the square brackets vs the dot.

1 Answer

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

For code formatting, you can use the instructions for code formatting in the Markdown Cheatsheet pop-up below the "Add an Answer" area. :arrow_heading_down:   Or watch this video on code formatting.

But here's the difference between those statements:

  • namesActions.action() :point_left: this calls a method named "action"
  • namesActions[action]() :point_left: this calls a method by the name that is stored in the string variable action

So if you had action = "test"; then doing the second one would be the same as namesActions.test().

Vic Mercier
Vic Mercier
3,276 Points
Vic Mercier
Vic Mercier
3,276 Points

When using the bracket syntax the string you passed into the square bracket , it will cinvert that value to a property name?

Steven Parker
Steven Parker
231,271 Points
Steven Parker
Steven Parker
231,271 Points

That's right. The value of the term in the brackets will be used as a property (or method) name.