ES5 Shim
The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present. The array is searched backwards, starting at fromIndex.
Source: ps-scripting-es5shim
npm install @extendscript/aes.patch.array.lastindexof
#include 'node_modules/@extendscript/aes.patch.array.lastindexof/lastindexof.js'
You can test the code against a range of targets:
npm run test target-1 target-2
We keep a log of test results