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Passing a single item as IEnumerable
...the contents, leading to odd behaviour in some situations. You could use a read-only collection, but that's likely to involve even more wrapping. I think your solution is as neat as it gets.
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MongoDB and “joins” [duplicate]
... as if they were a single table (you "join two tables into one").
You can read more about DBRef here:
http://docs.mongodb.org/manual/applications/database-references/
There are two possible solutions for resolving references. One is to do it manually, as you have almost described. Just save a docu...
How to Disable landscape mode in Android?
... type in the landscape softkeyboard on their phones, and many tablet users read in portrait - and you should let them).
If you still need to force portrait for some reason, sensorPortrait may be better than portrait for Android 2.3+; this allows for upside-down portrait, which is quite common in tab...
What is the difference between ExecuteScalar, ExecuteReader and ExecuteNonQuery?
...the first row. An example might be SELECT @@IDENTITY AS 'Identity'.
ExecuteReader is used for any result set with multiple rows/columns (e.g., SELECT col1, col2 from sometable).
ExecuteNonQuery is typically used for SQL statements without results (e.g., UPDATE, INSERT, etc.).
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How to fix java.net.SocketException: Broken pipe?
...aused by:
most usually, writing to a connection when the other end has already closed it;
less usually, the peer closing the connection without reading all the data that is already pending at his end.
So in both cases you have a poorly defined or implemented application protocol.
There is a thi...
What is a lambda (function)?
...e way as anonymous delegates, but it can also be broken down and its logic read.
For instance (in C#3):
LinqToSqlContext.Where(
row => row.FieldName > 15 );
LinqToSql can read that function (x > 15) and convert it to the actual SQL to execute using expression trees.
The statement ...
How to remove all null elements from a ArrayList or String Array?
...
Try:
tourists.removeAll(Collections.singleton(null));
Read the Java API. The code will throw java.lang.UnsupportedOperationException for immutable lists (such as created with Arrays.asList); see this answer for more details.
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MySQL vs PostgreSQL for Web Applications [closed]
...
A note to future readers: The text below was last edited in August 2008. That's nearly 11 years ago as of this edit. Software can change rapidly from version to version, so before you go choosing a DBMS based on the advice below, do some rese...
Why should I use Hamcrest-Matcher and assertThat() instead of traditional assertXXX()-Methods
...alue", "anotherValue"));
One can discuss which one of those is easier to read, but once the assert fails, you'll get a good error message from assertThat, but only a very minimal amount of information from assertTrue.
assertThat will tell you what the assertion was and what you got instead. asser...
Execute command on all files in a directory
...ption of shell to delimit files with this NULL byte using the -d option of read command, we can do below
( shopt -s nullglob; printf '%s\0' ./* ) | while read -rd '' file; do
cmdToRun [option] -- "$file"
done
The nullglob and the printf are wrapped around (..) which means they are basically r...