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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|...
html5 localStorage error with Safari: “QUOTA_EXCEEDED_ERR: DOM Exception 22: An attempt was made to
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Apparently this is by design. When Safari (OS X or iOS) is in private browsing mode, it appears as though localStorage is available, but trying to call setItem throws an exception.
store.js line 73
"QUOTA_EXCEEDED_ERR: DOM Exception 22: An att...
What does the arrow operator, '->', do in Java?
...ather pass in the body of the method, read about anonymous method followed by lambda.
– Vivek Shukla
Jun 5 at 19:42
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Convert an array of primitive longs into a List of Longs
...);
EDIT: updated to provide a complete conversion to a list as suggested by comments and other fixes.
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How to make a smooth image rotation in Android?
...erpolator(new LinearInterpolator());
ImageView image= (ImageView) findViewById(R.id.imageView);
image.startAnimation(rotate);
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How to keep one variable constant with other one changing with row in excel
...dded note: instead of manually typing the dollar signs you can toggle them by selecting the cell and pressing F4.
– guitarthrower
Jan 29 '10 at 0:00
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Https Connection Android
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i'm trying to use that solution step by step and I'm getting such exception: 07-25 12:35:25.941: WARN/System.err(24383): java.lang.ClassCastException: org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl in place where I'm trying to open...
Creating an official github mirror
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Judging by the current content of https://github.com/mirrors, it would appear GitHub no longer does "official mirrors", as most projects that want their code mirrored on GitHub today just makea an organization for it, such as Git its...
Difference between Node object and Element object?
...tally confused between Node object and Element object.
document.getElementById() returns Element object while document.getElementsByClassName()
returns NodeList object(Collection of Elements or Nodes?)
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How do I put an already-running process under nohup?
...<PID>
This stops the script (if running). Its state can be checked by ps -f <PID>, where the STAT field is 'T+' (or in case of ^Z 'T'), which means (man ps(1))
T Stopped, either by a job control signal or because it is being traced
+ is in the foreground process group
(gdb) c...