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SQL update fields of one table from fields of another one
...23 is optional, to update a selected row.
SQL Fiddle.
Related answers with more explanation:
Dynamic UPDATE fails due to unwanted parenthesis around string in plpgsql
Update multiple columns that start with a specific string
Partial solutions with plain SQL
With list of shared columns
You still ne...
Create JSON-object the correct way
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When to use virtual destructors?
...compiler won't let you call delete on a base class pointer.
You can learn more about virtuality and virtual base class destructor in this article from Herb Sutter.
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Test if a command outputs an empty string
...ossible in the above example, since a single newline is a valid filename! More information in this answer.
Exit code
If you want to check that the command completed successfully, you can inspect $?, which contains the exit code of the last command (zero for success, non-zero for failure). For e...
Difference between declaring variables before or in loop?
... You beat me I was just about to post my results for profiling, I got more or less the same and yes surprisingly B is faster really would have thought A if I had needed to bet on it.
– Mark Davidson
Jan 2 '09 at 16:27
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LINQ to Entities case sensitive comparison
...E Thingies
ALTER COLUMN Name VARCHAR(25)
COLLATE Latin1_General_CS_AS
For more information on the SQL Server Collates, take a a look at SQL SERVER Collate Case Sensitive SQL Query Search
Client-side solution:
The only solution that you can apply on client side is to use LINQ to Objects to do yet ...
How exactly does the android:onClick XML attribute differ from setOnClickListener?
...public void onClick(View v) {
myFancyMethod(v);
}
});
// some more code
public void myFancyMethod(View v) {
// does something very interesting
}
Above is a code implementation of an OnClickListener. And this is the XML implementation.
XML Implementation
<?xml version="1.0" e...
Git Cherry-pick vs Merge Workflow
...nderstand the merge workflow fairly easily. rebase tends to be considered more advanced. It's best to understand both, but people who do not want to be experts in version control (which in my experience has included many colleagues who are damn good at what they do, but don't want to spend the ext...
Cancellation token in Task constructor: why?
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How do RVM and rbenv actually work?
...run a Ruby/gem executable.
Also, the thing about RVM is, it covers a lot more then just managing Rubies, it has a lot more than any other tool (there are others apart from RVM and rbenv: https://twitter.com/#!/mpapis/status/171714447910502401)
Do not forget about instant support you get on IRC in...