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Using group by on multiple columns
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I would like to add that the order in which you group by the columns does not matter. In the above example group by Semester, Subject would have given the same result
– user2441441
Sep 29 '15 at 21:07
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Should each and every table have a primary key?
...nsisting of the PK's of both records being joined. E.g. CREATE TABLE PersonOrder (PersonId int, OrderId int, PRIMARY KEY(PersonId, OrderId)).
– Keith Williams
May 14 '09 at 12:35
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Elements order in a “for (… in …)” loop
... "for…in" loop in Javascript loop through the hashtables/elements in the order they are declared? Is there a browser which doesn't do it in order?
The object I wish to use will be declared once and will never be modified.
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What's wrong with using $_REQUEST[]?
...roduce.
You can change this behaviour to the much more sensible GP (no C) order with the request_order config in PHP 5.3. Where this is not possible, I personally would avoid $_REQUEST and, if I needed a combined GET+POST array, create it manually.
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What is an application binary interface (ABI)?
...rary (just like the API did), only on a lower level. Your API defines the order in which you pass arguments to a function. Your ABI defines the mechanics of how these arguments are passed (registers, stack, etc.). Your API defines which functions are part of your library. Your ABI defines how yo...
NOT using repository pattern, use the ORM as is (EF)
... I have to write. I might as well write stored procedures. I don't want GetOrder, GetOrderWithOrderItem, GetOrderWithOrderItemWithOrderActivity, GetOrderByUserId, and so on... I just want to get the main entity and traverse and include the object graph as I so please.
Most examples of repositories ...
Python subprocess.Popen “OSError: [Errno 12] Cannot allocate memory”
...ve, from within your container, over swap and overcommit configuration (in order to influence the outcome of the enforcement.)
Now, in order to actually move forward I'd say you're left with two options:
switch to a larger instance, or
put some coding effort into more effectively controlling your...
Real world use cases of bitwise operators [closed]
...UIs used to rely on this for selection highlighting and other overlays, in order to eliminate the need for costly redraws. They're still useful in slow graphics protocols (i.e. remote desktop).
Those were just the first few examples I came up with - this is hardly an exhaustive list.
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Getting current device language in iOS?
... language to Japanese, my region will still be English (United States). In order to retrieve the currently selected language, you can do:
NSString * language = [[NSLocale preferredLanguages] firstObject];
This will return a two letter code for the currently selected language. "en" for English, "e...
How to run test methods in specific order in JUnit4?
I want to execute test methods which are annotated by @Test in specific order.
18 Answers
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