peterherrmann

/**
* Invokes a function, performing up to 5 retries with exponential backoff.
* Retries with delays of approximately 1, 2, 4, 8 then 16 seconds for a total of 
* about 32 seconds before it gives up and rethrows the last error. 
* See: https://developers.google.com/google-apps/documents-list/#implementing_exponential_backoff 
<h3>Examples:</h3>
<pre>//Calls an anonymous function that concatenates a greeting with the current Apps user's email
var example1 = GASRetry.call(function(){return "Hello, " + Session.getActiveUser().getEmail();});
</pre><pre>//Calls an existing function
var example2 = GASRetry.call(myFunction);