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Cannot use ref or out parameter in lambda expressions
...on causes the parameter p1 to live longer than the current method frame as its value can be accessed after the method frame is no longer on the stack
Func<int> Example(int p1) {
return () => p1;
}
Another property of captured variables is that changes to the variable are also visible o...
Difference between a Seq and a List in Scala
... List, and Scala's List would be Java's LinkedList.
Note that Seq is a trait, which is equivalent to Java's interface, but with the equivalent of up-and-coming defender methods. Scala's List is an abstract class that is extended by Nil and ::, which are the concrete implementations of List.
So, wh...
IE9 border-radius and background gradient bleeding
... apparently able to handle rounded corners by using the CSS3 standard definition of border-radius .
17 Answers
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How to set initial value and auto increment in MySQL?
How do I set the initial value for an "id" column in a MySQL table that start from 1001?
10 Answers
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Difference between dispatch_async and dispatch_sync on serial queue?
...nly return after the block is finished whereas dispatch_async return after it is added to the queue and may not finished.
for this code
dispatch_async(_serialQueue, ^{ printf("1"); });
printf("2");
dispatch_async(_serialQueue, ^{ printf("3"); });
printf("4");
It may print 2413 or 2143 or 1234 bu...
Where is svn.exe in my machine?
...u can install a compatible discrete version if you need to access the repository from the command line.
UPDATE: Recent versions of the TortoiseSVN package can install a discrete svn.exe in addition to the one linked into the GUI binary. It is located in the same bin directory where the main progra...
Why use symbols as hash keys in Ruby?
...ically "immutable strings" .. that means that they can not be changed, and it implies that the same symbol when referenced many times throughout your source code, is always stored as the same entity, e.g. has the same object id.
Strings on the other hand are mutable, they can be changed anytime. T...
WebClient vs. HttpWebRequest/HttpWebResponse
It seems to me that most of what can be accomplished with HttpWebRequest/Response can also be accomplished with the WebClient class. I read somewhere that WebClient is a high-level wrapper for WebRequest/Response .
So far, I can't see anything that can be accomplished with HttpWebRequest/...
What is the point of Lookup?
...
It's a cross between an IGrouping and a dictionary. It lets you group items together by a key, but then access them via that key in an efficient manner (rather than just iterating over them all, which is what GroupBy lets you...
Get last record in a queryset
...no such ordering
is defined for a given QuerySet,
calling reverse() on it has no real
effect (the ordering was undefined
prior to calling reverse(), and will
remain undefined afterward).
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