user1028741

user1028741 has asked 26 questions and find answers to 2 problems.

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user1028741 questions

How to optimize aggregation so that aggregatiton per consumer is done first?
is HTTP 200 response actually necessary for IPN paypal protocol?
an elegant way to check for null
Visibility in concurrent C++ programs
Prevent users from downloading and using my Java applet manually
What HTTP status code is appropriate when a client attempts to update a data entity that is stale on the client-side?
Amazon SNS - is it possible to subscribe after publication and still get the message?
PDF doc text shows differently in IE / Firefox / Chrome
Why is volatile variable much more efficient than plain synchronization
What is the difference between "withZone()" and "toDateTime()" methods of joda DateTime

user1028741 answers

Debugging PDF for error