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What requests do browsers' “F5” and “Ctrl + F5” refreshes generate?
...loading the same little icon a few hundred times on your auto-refresh Ajax site, it's because you initially loaded the page using CTRL-F5.
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Preventing an image from being draggable or selectable without using JS
... to add unselectable="on" attribute onto each element */
/* Check this site for more details: http://help.dottoro.com/lhwdpnva.php */
-moz-user-select: none; /* These user-select properties are inheritable, used to prevent text selection */
-webkit-user-select: none;
-ms-user-select:...
How do I set up a simple delegate to communicate between two view controllers?
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You need to use delegates and protocols. Here is a site with an example http://iosdevelopertips.com/objective-c/the-basics-of-protocols-and-delegates.html
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How can i query for null values in entity framework?
...ut the issue, I encourage you to vote for it in our new Feature Suggestion site: https://data.uservoice.com.
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ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
...5 = 3
2.7 = 3
You can check the RoundingMode information here: http://www.javabeat.net/precise-rounding-of-decimals-using-rounding-mode-enumeration/
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How should one use std::optional?
... but I don't understand when I should use it or how I should use it. The site doesn't contain any examples as of yet which leaves it harder for me to grasp the true concept of this object. When is std::optional a good choice to use, and how does it compensate for what was not found in the previo...
Saving changes after table edit in SQL Server Management Studio
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Microsoft Support site discourages this, but if you don't have any data in the table, I don't see the harm. Probably best to use TSQL to make the changes.
– Jon Smock
Feb 17 '10 at 16:38
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What does a \ (backslash) do in PHP (5.3+)?
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The \ is used in PHP 5.3 for namespaces. See http://www.php.net/manual/en/language.namespaces.rationale.php for more information on namespaces and PHP.
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What does the `forall` keyword in Haskell/GHC do?
...tantiation takes place in the body of the function rather than at the call site.
Summary: A complete explanation of the forall keyword requires math and can be understood only by someone who has studied the math. Even partial explanations are hard to understand without math. But maybe my partial...
MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
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Subqueries vs joins
http://www.scribd.com/doc/2546837/New-Subquery-Optimizations-In-MySQL-6
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