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What is the use of “ref” for reference-type variables in C#?
I understand that if I pass a value-type ( int , struct , etc.) as a parameter (without the ref keyword), a copy of that variable is passed to the method, but if I use the ref keyword a reference to that variable is passed, not a new one.
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How to create a simple map using JavaScript/JQuery [duplicate]
...the .toString of the key Objects, when storing and retrieving the entries, convert the objects to a string which represents your understanding of uniqueness. E.g. map[toUniqueString(key1)] = 1
Sometimes, though, that is not possible. If you want to map data based on, for example File objects, ther...
What is “android:allowBackup”?
...r the application data and settings. If a user performs a factory reset or converts to a new Android-powered device, the system automatically restores your backup data when the application is re-installed. This way, your users don't need to reproduce their previous data or application settings.
~T...
Is there any advantage of using map over unordered_map in case of trivial keys?
...( amortized O(1) vs. O(log n) ). Most times I use a map, I use either int or std::string as the key type; hence, I've got no problems with the definition of the hash function. The more I thought about it, the more I came to realize that I can't find any reason of using a std::map over a s...
How to get the type of T from a member of a generic class or method?
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new List<int>().GetType().GetGenericArguments() returns System.Type[1] here with System.Int32 as entry
– Rauhotz
Feb 17 '09 at 15:40
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How to “crop” a rectangular image into a square with CSS?
...ikely SASS/SCSS - If you're using straight CSS, this post tells you how to convert: stackoverflow.com/questions/26760776/…
– Steve Allday
Sep 12 at 23:28
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How to find if an array contains a specific string in JavaScript/jQuery? [duplicate]
...ermalink;. Using post.categories returns this error in console.log: "can't convert null to object".
– Cofey
May 24 '11 at 20:41
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Take a screenshot of a webpage with JavaScript?
...eenshot. I had to use the keybd_event API call because SendKeys can't do PrintScreen. Here's the code for that:
Declare Sub keybd_event Lib "user32" _
(ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Public Const CaptWindow = 2
Public Sub ScreenGrab()
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What's Alternative to Singleton
...he last article explains in detail how to move the creation of new objects into a factory, so you can avoid using singletons. Worth reading for sure.
In short we move all of the new operators to a factory.
We group all of the objects of similar lifetime into a single factory.
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MySQL case insensitive select
...T utf8 COLLATE utf8_bin;
-- or change table collation
ALTER TABLE `table` CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-- or change column collation
ALTER TABLE `table` CHANGE `Value`
`Value` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_bin;
Your comparisons should now be case-sensitive....