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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...
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...
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...
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...
Thread-safe List property
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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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Group by month and year in MySQL
...aryDateTime) DESC
Should use DESC for both YEAR and Month to get correct order.
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MySQL, update multiple tables with one query
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Take the case of two tables, Books and Orders. In case, we increase the number of books in a particular order with Order.ID = 1002 in Orders table then we also need to reduce that the total number of books available in our stock by the same number in Books table.
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Laravel 4: how to “order by” using Eloquent ORM [duplicate]
Simple question - how do I order by 'id' descending in Laravel 4.
3 Answers
3
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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...
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...