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RabbitMQ / AMQP: single queue, multiple consumers for same message?

...ueue is a given, and not configurable. Ie, separate queues are required in order to have the same message ID be handled by multiple consumers. Is this commonly done? Should I just have the exchange route the message into two separate queues, with a single consumer, instead? No it's not, single que...
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How to find gaps in sequential numbering in mysql?

... Note: This query doesn't work on temporary tables. My problem was the order number I was searching for gaps in is not distinct (the table stores order lines, so the order number they belong to repeats for each line). 1st query: 2812 rows in set (1 min 31.09 sec). Made another table by selecting...
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DDD - the rule that Entities can't access Repositories directly

...e complicated validation rules. Let's say you're Amazon.com. Have you ever ordered something with an expired credit card? I have, where I haven't updated the card and bought something. It accepts the order and the UI informs me that everything is peachy. About 15 minutes later, I'll get an e-mail sa...
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Disable all table constraints in Oracle

...NABLED' AND NOT (t.iot_type IS NOT NULL AND c.constraint_type = 'P') ORDER BY c.constraint_type DESC) LOOP dbms_utility.exec_ddl_statement('alter table "' || c.owner || '"."' || c.table_name || '" disable constraint ' || c.constraint_name); END LOOP; END; / Enabling the constraints a...
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Thread-safe List property

... ConcurrentBag is unordered collection, so unlike List<T> it does not guarantee ordering. Also you cannot access items by index. – Radek Stromský Mar 7 '13 at 13:56 ...
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Shuffle two list at once with same order

...nts and documents2 I have the same documents and I need shuffle them in order to keep same order in both lists. I cannot shuffle them separately because each time I shuffle the list, I get other results. That is why I need to shuffle the at once with same order because I need compare them in the ...
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What is the difference between HashSet and List?

...SymmetricExceptWith(hashSet2);//hashSet1 -> 4, 5, 6 By the way, the order is not preserved in HashSets. In the example, we added element "2" last but it is in the second order: HashSet<string> hashSet1 = new HashSet<string>() { "3", "4", "8" }; hashSet1.Add("1"); // 3, 4, 8, 1...
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Panel.Dock Fill ignoring other Panel.Dock setting

...l, it may fill the entire form, ignoring the first panel. Changing the tab order does nothing. 10 Answers ...
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How can I sort arrays and data in PHP?

...az']; } } For those familiar, this is equivalent to an SQL query with ORDER BY foo, baz. Also see this very neat shorthand version and how to create such a comparison function dynamically for an arbitrary number of keys. Sorting into a manual, static order If you want to sort elements into a "m...
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How can I list all tags in my Git repository by the date they were created?

...t=-creatordate As I detail in "How to sort git tags by version string order of form rc-X.Y.Z.W?", you can add a sort order to git tag (since Git 2.0 June 2014). That sort order includes as field name (listed in git for-each-ref) taggerdate. That allows for git tag --sort=taggerdate (mentioned...