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How can I rename a database column in a Ruby on Rails migration?
...te of self.up, so "if you need or do something else or do nothing" isn't really recommended. Just do: rename_column :table_name, :new_column, :old_column
– Luke Griffiths
Aug 29 '11 at 15:21
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Why not use exceptions as regular flow of control?
To avoid all standard-answers I could have Googled on, I will provide an example you all can attack at will.
24 Answers
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Difference between await and ContinueWith
...ng example. I'm trying to use TPL for the first time and have been reading all the documentation, but don't understand the difference.
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Installing SciPy and NumPy using pip
...t requires both the SciPy and NumPy libraries.
While developing, I installed both using
8 Answers
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Programmatically update widget from activity/service/receiver
...sed it to start failing. This method (of directly updating the fields manually) works better. For my purposes, at least.
– durbnpoisn
Apr 26 '14 at 11:35
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How can I format my grep output to show line numbers at the end of the line, and also the hit count?
... sometimes man page can take many pages. And this is hard to read all of them
– Eugen Konkov
May 22 '18 at 13:44
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how to read value from string.xml in android?
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Try this
String mess = getResources().getString(R.string.mess_1);
UPDATE
String string = getString(R.string.hello);
You can use either getString(int) or getText(int) to retrieve a string. getText(int) will retain any rich text styling applied to the string.
Reference: https://dev...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
...b;
}
First the left four bits are swapped with the right four bits. Then all adjacent pairs are swapped and then all adjacent single bits. This results in a reversed order.
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Git merge without auto commit
... FYI: If you want to merge the changes and then commit as if you had manually typed all of the changes you merged in (as opposed to a traditional merge) you need to run rm .git/MERGE_HEAD afterward, which will force git to forget that the merge happened.
– Jonn
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Rails: How can I set default values in ActiveRecord?
...of the available methods, but I believe that defining an after_initialize callback is the way to go for the following reasons:
default_scope will initialize values for new models, but then that will become the scope on which you find the model. If you just want to initialize some numbers to 0 then...