[removed] compare variable against array of values

Question

In javascript I am doing the following which works fine.

if (myVar == 25 || myVar == 26 || myVar == 27 || myVar == 28)
 {
   //do something
 }

Answer 1

You can use Array.indexOf(), it returns the first index at which a given element can be found in the array, or -1 if it is not present.

Use

var arr = [25, 26, 27, 28];
console.log(arr.indexOf(25) > -1);
console.log(arr.indexOf(31) > -1);

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Array.includes() method can also be used it returns boolean.

var arr = [25, 26, 27, 28];
console.log(arr.includes(25));
console.log(arr.includes(31));