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Why is \r a newline for Vim?
...Ctrl-M = ^M)
When Replacing
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\r is newline, \n is a null byte (0x00).
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Scala constructor overload?
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how to check if List element contains an item with a Particular Property Value
...ant: Find.
Searches for an element that matches the conditions defined by the specified predicate, and returns the first occurrence within the entire List<T>.
Example code:
PricePublicModel result = pricePublicList.Find(x => x.Size == 200);
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SQL Server 2005 How Create a Unique Constraint?
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I also found you can do this via, the database diagrams.
By right clicking the table and selecting Indexes/Keys...
Click the 'Add' button, and change the columns to the column(s) you wish make unique.
Change Is Unique to Yes.
Click close and save the diagram, and it will add it ...
JBoss vs Tomcat again [closed]
...ain Java EE features beyond the Servlet API, you can easily enhance Tomcat by providing the required libraries as part of your application. For example, if you need JPA features you can include Hibernate or OpenEJB and JPA works nearly out of the box.
How to decide whether to use Tomcat or a full s...
What jsf component can render a div tag?
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You can create a DIV component using the <h:panelGroup/>.
By default, the <h:panelGroup/> will generate a SPAN in the HTML code.
However, if you specify layout="block", then the component will be a DIV in the generated HTML code.
<h:panelGroup layout="block"/>
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How to get jQuery to wait until an effect is finished?
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How do I retrieve the number of columns in a Pandas data frame?
...pe of columns,
Not null value count, memory usage by Data Frame
len(local_df.columns) --> columns attribute will return index object of data frame columns & len function will return total available columns.
local_df.head(0) --> head method with parameter 0 will ...
`staticmethod` and `abc.abstractmethod`: Will it blend?
...uld abstractstatic be added upstream to abc.py?
– nnyby
Mar 3 '15 at 18:44
3
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Test if remote TCP port is open from a shell script
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As pointed by B. Rhodes, nc (netcat) will do the job. A more compact way to use it:
nc -z <host> <port>
That way nc will only check if the port is open, exiting with 0 on success, 1 on failure.
For a quick interactive check...