doYouNeedToChangeYourTargetLibraryES2023.ts(19,42): error TS2345: Argument of type 'undefined' is not assignable to parameter of type 'number'.


==== doYouNeedToChangeYourTargetLibraryES2023.ts (1 errors) ====
    export let array = [0, 2, 3, 4];
    
    function somePredicate(x: any): boolean {
        return x === 4;
    }
    
    export let lastIndex1 = array.findLastIndex(v => v === 4);
    export let lastIndex2 = array.findLastIndex(somePredicate);
    
    export let last1 = array.findLast(somePredicate);
    export let last2 = array.findLast(somePredicate);
    
    export let sorted = array.toSorted();
    
    export let spliced1 = array.toSpliced(2);
    export let spliced2 = array.toSpliced(2, 1);
    export let spliced3 = array.toSpliced(2, 1, 4, 5, 6, 7);
    export let spliced4 = array.toSpliced(2, undefined);
    export let spliced5 = array.toSpliced(2, undefined, 4, 5, 6, 7);
                                             ~~~~~~~~~
!!! error TS2345: Argument of type 'undefined' is not assignable to parameter of type 'number'.
    
    export let startsWithOne = array.with(0, 1);
    export let inTheEnd = array.with(-1, 1);