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SET versus SELECT when assigning variables?
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SET is the ANSI standard for variable assignment, SELECT is not.
SET can only assign one variable at a time, SELECT can make multiple assignments at once.
If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SE...
Need to reset git branch to origin version
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If you haven't pushed to origin yet, you can reset your branch to the upstream branch with:
git checkout mybranch
git reset --hard origin/mybranch
(Make sure that you reference your latest commit in a separate branch, like you mention in your question)
Note that...
How can I provide multiple conditions for data trigger in WPF?
How can I provide multiple conditions for data trigger in WPF?
4 Answers
4
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Boost Statechart vs. Meta State Machine
...ge (actually several). For example, using the eUML front-end, a transition can be described as Source + Event [Guard] / Action == Target
MSM will make your compiler suffer for bigger state machines, so you will need a pretty recent compiler (g++ >= 4.x, VC >= 9)
You can make yourself a bette...
Is there a naming convention for MySQL?
...ou might want to consider how to deal with this. This is a bit of a corner case though!
Point 4 - Similar to Point 3. You may want to introduce a number at the end of the foreign key name to cater for having more than one referencing column.
Point 5 - I would avoid this. It provides you with littl...
What is the best way to deal with the NSDateFormatter locale “feechur”?
...a!!" moment, sometimes it's more of a "Duh!!" This is the latter. In the category for initWithSafeLocale the "super" init was coded as self = [super init];. This inits the SUPERCLASS of NSDateFormatter but does not init the NSDateFormatter object itself.
Apparently when this initialization is ski...
Is module __file__ attribute absolute or relative?
... a file. The __file__ attribute is not present for C modules that are statically linked into the interpreter; for extension modules loaded dynamically from a shared library, it is the pathname of the shared library file.
From the mailing list thread linked by @kindall in a comment to the question:...
MySQL foreign key constraints, cascade delete
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If your cascading deletes nuke a product because it was a member of a category that was killed, then you've set up your foreign keys improperly. Given your example tables, you should have the following table setup:
CREATE TABLE cate...
Can I run javascript before the whole page is loaded?
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Not only can you, but you have to make a special effort not to if you don't want to. :-)
When the browser encounters a classic script tag when parsing the HTML, it stops parsing and hands over to the JavaScript interpreter, which run...
Simple explanation of clojure protocols
...to have them type-safe makes sense even in a language like Clojure. Just because we can't statically check type-safety doesn't mean that we want our code to randomly break, right?]
The Expression Problem is, how do you actually provide such extensibility in a language?
It turns out that for typica...