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how to generate migration to make references polymorphic
...or 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 AddImageableToProducts < ActiveRecord::Migration
def up
change_table :products do |t|...
log4net argument to LogManager.GetLogger
Why do most log4net examples get the logger for a class by doing this:
5 Answers
5
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How to add reference to a method parameter in javadoc?
...ue, offset, this.value, 0, count);
}
Parameter references are surrounded by <code></code> tags, which means that the Javadoc syntax does not provide any way to do such a thing. (I think String.class is a good example of javadoc usage).
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How do I position one image on top of another in HTML?
...D of a and "b" had an ID of b, could this JavaScript code (setting x and y by some calculation) work for changing the position of b?
– DDPWNAGE
Aug 13 '15 at 1:42
1
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Android ClickableSpan not calling onClick
...ed.SPAN_EXCLUSIVE_EXCLUSIVE);
TextView textViewTerms = (TextView) findViewById(R.id.sign_up_terms_text);
textViewTerms.setText(spannable);
textViewTerms.setClickable(true);
textViewTerms.setMovementMethod(LinkMovementMethod.getInstance());
...
JavaScript + Unicode regexes
...ts you build a JavaScript regular expression that matches characters that fall in any number of specified Unicode blocks.
I just did it for the "General Punctuation" and "Supplemental Punctuation" sub-ranges, and the result is as simple and straight-forward as I would have expected it:
[\u2000-\u20...
Dialog to pick image from gallery or from camera
Is there a standard way to call dialog box with choose either to pick an image from the camera or to get from gallery (like in build-in phone book or Skype)?
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How to get current time and date in C++?
... @Johannes, just added mine. At this rate, this should be the top answer by 15 August 2017, 16:31 UTC :-)
– Martin Broadhurst
Feb 26 '16 at 23:30
62
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Simulating ENTER keypress in bash script
..., it didn't look quite right to me, so I had to feed it through xxd. It's by far the simplest yet efficient method of seeing exactly what commands output. Gotta love stupid Unix tricks.
– Marcin
Jun 7 '11 at 11:55
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Android, How can I Convert String to Date?
I store current time in database each time application starts by user.
6 Answers
6
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