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Primary key/foreign Key naming convention [closed]
...lly give a pretty good clue as to how it should be used. e.g. USING syntax means columns with the same domain should have the same name, NULL = NULL -> NULL means NULL is "unknown" rather than "not applicable", and ON UPDATE CASCADE means that keys need only be unique, not immutable.
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Difference between Destroy and Delete
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Hello @user740584 - thanks for your answer. What do you mean by "runs any callbacks on the model"?
– BKSpurgeon
Mar 10 '16 at 1:23
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Best practice using NSLocalizedString
... Cocoa that it's unreasonable to write custom code to handle localization, meaning you will have to use it. That said, a little tooling can help, here is how I proceed:
Updating the strings file
genstrings overwrites your string files, discarding all your previous translations.
I wrote update_stri...
ImageView in circular through xml
...s the circular border in front, it's not transparent outside the circle. I mean, the circle is there, however, the image corners are visible and transcends the circle area behind it
– user3050910
Feb 28 '14 at 22:13
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Data access object (DAO) in Java
...very simple exaple, which is what i needed. can you please explain wat you meant with 'concrete implementation' did you mean that we have to next write the definition for the methods by implementing the interface to a class.. ??
– Vasanth Nag K V
Oct 3 '13 at 1...
What does the thread_local mean in C++11?
...e seed must be maintained on a per-thread basis. Using a thread-local seed means that each thread gets its own random number sequence, independent of other threads.
If your seed was a local variable within the random function, it would be initialised every time you called it, giving you the same nu...
SQL select only rows with max value on a column [duplicate]
...his select id, max(rev), rev from YourTable group by id and you see what I mean. Take your time and try to understand it
– Adriano Carneiro
Oct 12 '11 at 20:05
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How to use if statements in underscore.js templates?
...se this shorthand:
<%= typeof(id)!== 'undefined' ? id : '' %>
It means display the id if is valid and blank if it wasn't.
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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...dians[a] that the two fingers rotate. When the angle is smaller than 0, it means that fingers rotate clockwise; when the angle is bigger than 0, it means that the fingers rotate counterclockwise. It changes the heading of ArrowSprite corresponding to the angle it returns. At the end of Rotate, it up...
Oracle “Partition By” Keyword
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Do you mean "without a sub select, which is much slower"? I guess I'm confused if the sub select is slower or faster than last over and min over. I would imagine a sub select would be slower, but the english grammar in the answer do...