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How to check if an object is a certain type
I am passing various objects to a subroutine to run the same process but using a different object each time. For example, in one case I am using a ListView and in another case I am passing a DropDownList.
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What is the usefulness of `enable_shared_from_this`?
...from_this while reading the Boost.Asio examples and after reading the documentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense.
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Running shell command and capturing the output
... and return its output as a string , no matter, is it an error or success message. I just want to get the same result that I would have gotten with the command line.
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COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
... token, i.e. *.
An alternate syntax
In fact, if it is not permitted to name a field as same as its table name, RDBMS language designer could give COUNT(tableNameHere) the same semantics as COUNT(*). Example:
For counting rows we could have this:
SELECT COUNT(emp) FROM emp
And they could make i...
What is the difference between a field and a property?
...external way they are accessed by the things that use your class." forgive me if I'm incorrectly understanding, then, but why the need for access modifiers in front of properties at all, if the field behind it seems to handle this? i.e. why make a property anything other than public?
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How do DATETIME values work in SQLite?
I’m creating Android apps and need to save date/time of the creation record. The SQLite docs say, however, "SQLite does not have a storage class set aside for storing dates and/or times" and it's "capable of storing dates and times as TEXT, REAL, or INTEGER values".
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What is the difference between a symbolic link and a hard link?
...n inode.
A hard link, then, just creates another file with a link to the same underlying inode.
When you delete a file, it removes one link to the underlying inode. The inode is only deleted (or deletable/over-writable) when all links to the inode have been deleted.
A symbolic link is a link to an...
Implement C# Generic Timeout
I am looking for good ideas for implementing a generic way to have a single line (or anonymous delegate) of code execute with a timeout.
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Socket.io rooms difference between broadcast.to and sockets.in
Socket.io's readme contains the following example:
5 Answers
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Better way of incrementing build number?
I have been using a shell script as part of my Xcode build process to increment the build number within the plist file, however it's making Xcode 4.2.1 crash frequently (with an error about the target not belonging to a project; I'm guessing the changing of the plist file is confusing Xcode in s...