define: DUK_OPT_NO_NONSTD_ARRAY_MAP_TRAILER
introduced: 1.0.0
tags:
  - ecmascript
description: >
  For better compatibility with existing code, Array.prototype.map() has
  non-standard behavior by default for trailing non-existent elements of
  the map result, see
  https://github.com/svaarala/duktape/blob/master/ecmascript-testcases/test-bi-array-proto-map-nonstd-trailing.js.

  If this option is given, map() will behave in a strictly conforming
  fashion, ignoring non-existent trailing elements in the result length.