API Reference > bentleyjs-core > Collections > ReadonlySortedArray > indexOf indexOf Method Looks up the index of an element comparing equal to the specified value using binary search. indexOf(value: T): number Parameter Type Description value T The value to search for Returns - number the index of the first equivalent element found in the array, or -1 if no such element exists. Defined in core/bentley/src/SortedArray.ts Line 129 Last Updated: 11 June, 2024