Javascript - Array - How to check if array contains all objects with specific property

Javascript tutorial. This is example how to check if array contains at least one object with an attribute that equals a given value
Javascript
0:00 Use case
1:27 Trying to learn piano

[felipesignorellireis]

Hi Alex.
Do you know how I can use the “IN” operator, similar SQL but with java?

For example:

I usually create a lot of Else If, for the same results.
But, if want to create only one Else IF using de IN operator (similar to SQL)

Imagine that I have a lot of Else if (10). One for each results
B

if (left(column("StringColumn"), 2) == "OE")
{
"ComConfronto_Msaf"
}
else if (left(column("StringColumn"), 2) == "EU")
{
"ComConfronto_Msaf"
}


But the code is to long and I want to simplify, similar to this:
if (left(column("StringColumn"), 2) == IN("OE", "EU", ETC, ETC, ETC)

I think that in java, I will have to use an array.
How could it be?