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NSOperation vs Grand Central Dispatch
... dependencies between operations. Both very simple with NSOperation, very difficult with GCD.) Apple's done the hard work of leveraging GCD to create a very nice object-friendly API with NSOperation. Take advantage of their work unless you have a reason not to.
Caveat:
On the other hand, if you rea...
Using C# reflection to call a constructor
...
}
EDIT: Yes, Activator.CreateInstance will work too. Use GetConstructor if you want to have more control over things, find out the parameter names etc. Activator.CreateInstance is great if you just want to call the constructor though.
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JUnit Testing Exceptions [duplicate]
...n exception is thrown.
For
@Test
Junit will consider test as failed if exception is thrown, provided it's an unchecked exception. If the exception is checked it won't compile and you will need to use other methods.
This link might help.
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Effect of a Bitwise Operator on a Boolean in Java
...en the operands are boolean, and their behaviour in the latter case is specified. See the section 15.22.2 of the Java Language Specification for details.
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Grepping a huge file (80GB) any way to speed it up?
...ng for a fixed string, not a regular expression.
3) Remove the -i option, if you don't need it.
So your command becomes:
LC_ALL=C fgrep -A 5 -B 5 'db_pd.Clients' eightygigsfile.sql
It will also be faster if you copy your file to RAM disk.
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Memory address of variables in Java
...@' character. What the identity hash code represents is implementation-specific. It often is the initial memory address of the object, but the object can be moved in memory by the VM over time. So (briefly) you can't rely on it being anything.
Getting the memory addresses of variables is meaningles...
Are class names in CSS selectors case sensitive?
...hile the selectors .SelfCatering and [class~="SelfCatering"] would not.2
If the document type defined class names as case-insensitive, then you would have a match regardless.
1 In quirks mode for all browsers, classes and IDs are case-insensitive. This means case-mismatching selectors will alwa...
Is there a method to generate a UUID with go language
...at's the purpose ?
These lines clamp the values of byte 6 and 8 to a specific range. rand.Read returns random bytes in the range 0-255, which are not all valid values for a UUID. As far as I can tell, this should be done for all the values in the slice though.
If you are on linux, you can alterna...
No route matches “/users/sign_out” devise rails 3
...sign_out' data-method='delete'>Sign out</a>").appendTo('body'); - if jQuery is loaded on the page.
– mraaroncruz
Jul 24 '12 at 18:52
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LINQ - Left Join, Group By, and Count
...ildTable on p.ParentId equals c.ChildParentId into j1
from j2 in j1.DefaultIfEmpty()
group j2 by p.ParentId into grouped
select new { ParentId = grouped.Key, Count = grouped.Count(t=>t.ChildId != null) }
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