Question

I have a string of IDs in CSV format in an input box

12,23,26,32

I have to check if this string contains 23 or 24, if yes then return false, else return true

Answer 1

Use indexOf. You can check if it contains a subString. If not found, it returns -1

var str = "12,23,26,32"
return !(str.indexOf("23")!=-1 || str.indexOf("24")!=-1) // Dont have 23 or 24

=======EDIT=======

Like @Matt said in comment, this solution will work also to “12,239,26,32” and thats not the point.

Make the split before check the indexOf, then you will get the element between the commas.

var array = "12,23,26,32".split(",");
return !(array.indexOf("23")!=-1 || array.indexOf("24")!=-1) // Dont have 23 or 24