Singletons the curse and blessing of many coding projects. 
Among other pitfalls, you’ll basically introduce a global variable in your system, making UnitTests much harder.
Why Singletons?
Despite the possible problems they can present, they are just so darn handy sometimes. …
Something I really missed in Actionscript 3 were enums. If you need ascending unique numeric ids ( e.g. for naming array indexes ), enums are your friend.
For our current project we programmed a messaging system. The system uses unique numeric ids for message …
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