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On design patterns: When should I use the singleton?
...ators and client side UI's also being possibly "acceptable" choices.
Read more at Singleton I love you, but you're bringing me down.
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How to execute more than one maven command in bat file?
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Joey's answer is great, but maybe a more complete code example will help anyone else like me who's also figuring out a similar problem of building multiple maven projects from a batch file in Windows:
REM maven itself uses a batch file so each mvn must be prec...
How can I find an element by CSS class with XPath?
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This selector should work but will be more efficient if you replace it with your suited markup:
//*[contains(@class, 'Test')]
Or, since we know the sought element is a div:
//div[contains(@class, 'Test')]
But since this will also match cases like class="Tes...
What is the difference between sed and awk? [closed]
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awk is oriented toward delimited fields on a per-line basis. It has much more robust programming constructs including if/else, while, do/while and for (C-style and array iteration). There is complete support for variables and single-dimension associative arrays plus (IMO) kludgey multi-dimension a...
Build query string for System.Net.HttpClient get
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http://example.com/?foo=bar%3c%3e%26-baz&bar=bazinga
that you could more than safely feed to your HttpClient.GetAsync method.
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How do I use Assert to verify that an exception has been thrown?
...string that needs to matcvh the exception message (and IU think that makes more sense)
– Ruben Bartelink
Jun 25 '09 at 10:48
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difference between primary key and unique key
...rimary Key is a unique key identifier of the record
Unique Key:
Can be more than one unique key in one table
Unique key can have NULL values
It can be a candidate key
Unique key can be NULL ; multiple rows can have NULL values and therefore may not be considered "unique"
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Learn C first before learning Objective-C [closed]
...t better thanks to objects (OOP programming can make complex programs much more lovely than functional programming; polymorphism for example is a brilliant feature)... and I really like Obj-C (much more than C++! I hate the C++ syntax and some language features are plain overkill and lead to bad de...
Python Empty Generator Function
...just replaces a no-op if statement with a no-op yield statement. But it is more idiomatic. Note that just using yield doesn't work.
>>> def f():
... yield
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>>> list(f())
[None]
Why not just use iter(())?
This question asks specifically about an empty generator function....
Difference between CTE and SubQuery?
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Sorry, I should have been more clearer in the my question. What would be the difference between CTE and Subquery in the context where CTE is used LIKE subquery?
– dance2die
Apr 1 '09 at 19:22
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