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how to generate migration to make references polymorphic
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As far as I know, there's no built-in generator for polymorphic associations. Generate a blank migration and then modify it by hand according to your needs.
Update:
You'll need to specify which table you're changing. According to this SO answer:
class AddImageableToP...
Make absolute positioned div expand parent div height
As you can see in the CSS below, I want child2 to position itself before child1 . This is because the site I'm currently developing should also work on mobile devices, on which the child2 should be at the bottom, as it contains the navigation which I want below the content on the mobile devices...
Https Connection Android
...ing an exception of ssl exception Not trusted server certificate. If i do normal http it is working perfectly fine. Do I have to accept the server certificate somehow?
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How to drop into REPL (Read, Eval, Print, Loop) from Python code
Is there a way to programmatically force a Python script to drop into a REPL at an arbitrary point in its execution, even if the script was launched from the command line?
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How to see full symlink path
When I'm using ls -la symlinkName or stat symlinkName not all the path is displayed
(e.g ../../../one/two/file.txt )
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Shell Script: Execute a python program from within a shell script
...hon python_script.py
Execute this command to make the script runnable for you : chmod u+x job.sh
Run it : ./job.sh
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How to know when UITableView did scroll to bottom in iPhone
I would like to know when a UITableView did scroll to bottom in order to load and show more content, something like a delegate or something else to let the controller know when the table did scroll to bottom.
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git update-index --assume-unchanged on directory
...this:
git update-index --assume-unchanged $(git ls-files | tr '\n' ' ')
or
git ls-files | tr '\n' ' ' | xargs git update-index --assume-unchanged
Although, with either case, file names with spaces will be problematic. If you have those, you can use this:
git ls-files -z | xargs -0 git update-...
What is difference between cacerts and keystore?
What's the difference between the two, cacerts and keystore?
4 Answers
4
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Change the Right Margin of a View Programmatically?
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EDIT: A more generic way of doing this that doesn't rely on the layout type (other than that it is a layout type which supports margins):
public static void setMargins (View v, int l, int t, int r, int b) {
if (v.getLayoutParams()...