Is there a way to make condition of if static/constant?

Suppose I have a snippet like this,

let arr = [{...},{...} ...]// huge array of objects;

arr.forEach(i => {
  if(someOtherProperty == "one") {
    ...
  } else if(someOtherProperty == "two") {
    ...
  }...

})

Basically, I have an if-else-if ladder inside a loop.

The condition does not depend on the array item.

I want to know if it is possible to evaluate the if condition prior to execution of the loop since the condition is static/constant throughout the loop run

Few ways I can think of is

1. keep the loop inside each of the if/else blocks. This way the if condition will be executed only once but I have more codes.

2. Use an object like

   let condition = {
     one: someOtherProperty == "one",
     two: someOtherProperty == "two",
     ...
   }
   
   

   And use it in the condition like if(condition.one) and so on.

   Please suggest a better way to deal with situations like this to improve the efficiency.