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How should I use try-with-resources with JDBC?
...he end of the resource list. The advantage of using two try blocks is that all of your code is present up front so you don't have to refer to a separate method:
public List<User> getUser(int userId) {
String sql = "SELECT id, username FROM users WHERE id = ?";
List<User> users =...
How to revert a merge commit that's already pushed to remote branch?
...se a merge commit has more than one parent, and Git does not know automatically which parent was the mainline, and which parent was the branch you want to un-merge.
When you view a merge commit in the output of git log, you will see its parents listed on the line that begins with Merge:
commit 8f9...
Split output of command by columns using Bash?
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One easy way is to add a pass of tr to squeeze any repeated field separators out:
$ ps | egrep 11383 | tr -s ' ' | cut -d ' ' -f 4
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Display two files side by side
...es only 72 columns for its output, but it's relatively easy to make it use all available columns of your terminal window:
pr -w $COLUMNS -m -t one.txt two.txt
Most shell's will store (and update) your terminal's screenwidth in the $COLUMNS environment variable, so we're just passing that value on...
phpunit mock method multiple calls with different arguments
...s for different input arguments? For example, I have database layer class called DB. This class has method called "Query ( string $query )", that method takes an SQL query string on input. Can I create mock for this class (DB) and set different return values for different Query method calls that dep...
What does .SD stand for in data.table in R
.SD looks useful but I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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Delete specific line number(s) from a text file using sed?
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Not all unixes have gnu sed with "-i". Don't make the mistake of falling back to "sed cmd file > file", which will wipe out your file.
– pra
Jan 22 '10 at 6:53
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Debugging Package Manager Console Update-Database Seed Method
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Here is similar question with a solution that works really well.
It does NOT require Thread.Sleep.
Just Launches the debugger using this code.
Clipped from the answer
if (!System.Diagnostics.Debugger.IsAttached)
System.Diagnostics.Debugger.Launch();
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Convert any object to a byte[]
... }
}
Note that obj and any properties/fields within obj (and so-on for all of their properties/fields) will all need to be tagged with the Serializable attribute to successfully be serialized with this.
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Generate a random point within a circle (uniformly)
...triangle ABC, where |AB|=|BC|? Let's make this easier by extending to a parallelogram ABCD. It's easy to generate points uniformly in ABCD. We uniformly pick a random point X on AB and Y on BC and choose Z such that XBYZ is a parallelogram. To get a uniformly chosen point in the original triangle we...