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Painless way to install a new version of R?
...han Linux). Does anyone have a good trick for doing the upgrade, from installing the software to copying all the settings/packages over?
...
Delete duplicate records in SQL Server?
...o this with window functions. It will order the dupes by empId, and delete all but the first one.
delete x from (
select *, rn=row_number() over (partition by EmployeeName order by empId)
from Employee
) x
where rn > 1;
Run it as a select to see what would be deleted:
select *
from (
s...
Default behavior of “git push” without a branch specified
... line. Possible values are:
nothing: do not push anything
matching: push all matching branches
All branches having the same name in both ends are considered to be matching.
This used to be the default, but not since Git 2.0 (simple is the new default).
upstream: push the current branch to its up...
What is the difference between Python and IPython?
... load into your own projects.
Easy to use, high performance tools for parallel computing.
Note that the first 2 lines tell you it helps you make the most of using Python. Thus, you don't need to alter your code, the IPython shell runs your python code just like the normal python shell does, o...
How do I attach events to dynamic HTML elements with jQuery? [duplicate]
Suppose I have some jQuery code that attaches an event handler to all elements with class .myclass .
8 Answers
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How to count lines in a document?
I have lines like these, and I want to know how many lines I actually have...
24 Answers
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Run a single test method with maven
I know you can run all the tests in a certain class using:
13 Answers
13
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Difference between File.separator and slash in paths
...ies for dealing with files, you can safely use / (slash, not backslash) on all platforms. The library code handles translating things into platform-specific paths internally.
You might want to use File.separator in UI, however, because it's best to show people what will make sense in their OS, rath...
SQL Query to concatenate column values from multiple rows in Oracle
... (with tag E)
extract the text of this
aggregate the xml (concatenate it)
call the resulting column "Result"
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Regex to replace multiple spaces with a single space
...place \s\s+ with ' ':
string = string.replace(/\s\s+/g, ' ');
If you really want to cover only spaces (and thus not tabs, newlines, etc), do so:
string = string.replace(/ +/g, ' ');
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