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Visibility of global variables in imported modules
... are global to a module, not across all modules. (Many people are confused by this, because in, say, C, a global is the same across all implementation files unless you explicitly make it static.)
There are different ways to solve this, depending on your actual use case.
Before even going down th...
Why is JsonRequestBehavior needed?
...safe to allow the get.
Further reading from my Wrox ASP.NET MVC3 book
By default, the ASP.NET MVC framework does not allow you to respond to
an HTTP GET request with a JSON payload. If you need to send JSON in
response to a GET, you'll need to explicitly allow the behavior by
using JsonRe...
Storing Image Data for offline web application (client-side storage database)
...lmost all browsers) for blob download from web server
I went with XHR2-Lib by Phil Parsons, which is very much like JQUERY .ajax()
https://github.com/p-m-p/xhr2-lib
Storage
IndexedDB for IE and FireFox
Chrome: Polyfill (blob stored using FileSystem API, reference kept in IndexedDB) polyfill
...
What is the best way to use a HashMap in C++?
... std::unordered_map) containers. In an ordered map the elements are sorted by the key, insert and access is in O(log n). Usually the standard library internally uses red black trees for ordered maps. But this is just an implementation detail. In an unordered map insert and access is in O(1). It is j...
OR is not supported with CASE Statement in SQL Server
... expressions can be used within the SELECT statement, WHERE clauses, Order by clause, HAVING clauses, Insert, UPDATE and DELETE statements.
A CASE expression has the following two formats:
Simple CASE expression
CASE expression
WHEN expression1 THEN Result1
WHEN expression2 THEN Result2
ELSE Res...
Opening the Settings app from another app
...
As mentioned by Karan Dua this is now possible in iOS8 using UIApplicationOpenSettingsURLString see Apple's Documentation.
Example:
Swift 4.2
UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!)
In Swift 3:
U...
Coarse-grained vs fine-grained
... better to have more coarse-grained service operations, which are composed by fine-grained operations
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How do I vertically center text with CSS? [duplicate]
... CSS just sizes the <div>, vertically center aligns the <span> by setting the <div>'s line-height equal to its height, and makes the <span> an inline-block with vertical-align: middle. Then it sets the line-height back to normal for the <span>, so its contents will flow...
Does git return specific return error codes?
...eturn a status of 0 for complete success. Other status codes are determine by the app. There are 255 other codes which meanings depend on the app. See their man pages for details.
– shawnhcorey
Oct 29 '18 at 13:54
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Please explain the exec() function and its family
...tly more efficient for the classic use case of fork() followed immediately by exec().
Note that there is a whole family of exec calls (execl, execle, execve and so on) but exec in context here means any of them.
The following diagram illustrates the typical fork/exec operation where the bash shell i...