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How can I reconcile detached HEAD with master/origin?
...dlink .git/HEAD. But symbolic links are not entirely portable, so they are now deprecated and symbolic refs (as described above) are used by default."
– Dmitry Minkovsky
Aug 2 '13 at 2:43
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PadLeft function in T-SQL
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SQL Server now supports the FORMAT function starting from version 2012, so:
SELECT FORMAT(id, '0000') FROM TableA
will do the trick.
If your id or column is in a varchar and represents a number you convert first:
SELECT FORMAT(CON...
Summarizing multiple columns with dplyr? [duplicate]
...x. I have a data frame with different variables and one grouping variable. Now I want to calculate the mean for each column within each group, using dplyr in R.
...
What does Expression.Quote() do that Expression.Constant() can’t already do?
... is a factory for adders that are bound to the outer lambda's parameter.
Now, suppose we wish to represent this as an expression tree that will later be compiled and executed. What should the body of the expression tree be? It depends on whether you want the compiled state to return a delegate or ...
How to define custom configuration variables in rails
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Update 1
Very recommended: I'm going with Rails Config gem nowadays for the fine grained control it provides.
Update2
If you want a quick solution, then check Jack Pratt's answer below.
Although my original answer below still works, this answer is now outdated. I recommend looking...
How do I add 24 hours to a unix timestamp in php?
I would like to add 24 hours to the timestamp for now. How do I find the unix timestamp number for 24 hours so I can add it to the timestamp for right now?
...
Conda: Installing / upgrading directly from github
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There's better support for this now through conda-env. You can, for example, now do:
name: sample_env
channels:
dependencies:
- requests
- bokeh>=0.10.0
- pip:
- "--editable=git+https://github.com/pythonforfacebook/facebook-sdk.git@8c0d34...
How do I create a simple 'Hello World' module in Magento?
...el. I might have time later for the model/template related topics, but for now, I don't. I will, however, briefly speak to your SQL question.
Magento uses an EAV database architecture. Whenever possible, try to use the model objects the system provides to get the information you need. I know it's a...
NOT using repository pattern, use the ORM as is (EF)
...es because the query is determined at runtime... OK so that's not good! So now it's up to the integration test to cover this.
With repository - You can now mock your repositories and unit test the layer(s) in between. Great right? Well not really... In the cases above where you have to leak logic i...
Hidden features of Perl?
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There are many non-obvious features in Perl.
For example, did you know that there can be a space after a sigil?
$ perl -wle 'my $x = 3; print $ x'
3
Or that you can give subs numeric names if you use symbolic references?
$ perl -lwe '*4 = sub { print "yes" }; 4->()'
yes
There's a...