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What is “callback hell” and how and why does RX solve it?
...ion together with a simple example that explains what is a "callback hell" for someone who does not know JavaScript and node.js ?
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Rails 3: Get Random Record
So, I've found several examples for finding a random record in Rails 2 -- the preferred method seems to be:
14 Answers
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SQL DROP TABLE foreign key constraint
...o delete all the tables in my database like this, will it take care of the foreign key constraint? If not, how do I take care of that first?
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SQL query to find record with ID not in another table
... primary key in database and I desire to find a disjoint set between them. For example,
6 Answers
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Right Align button in horizontal LinearLayout
...f you look at the attached image. I need my button to be right aligned but for some reason it's not working with 'gravity:right'...
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How do I add a Fragment to an Activity with a programmatically created content view
... fragment into the Activity as an inner class, or creating a new java file for the fragment fixes that.
The second issue is that when you're adding a fragment this way, you must pass a reference to the fragment's containing view, and that view must have a custom id. Using the default id will crash ...
Throw an error in a MySQL trigger
If I have a trigger before the update on a table, how can I throw an error that prevents the update on that table?
7 An...
how to get last insert id after insert query in codeigniter active record
I have an insert query (active record style) used to insert the form fields into a MySQL table. I want to get the last auto-incremented id for the insert operation as the return value of my query but I have some problems with it.
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How can you represent inheritance in a database?
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| 3 | 2010-08-20 14:00:00 | PROPERTY | NULL | Oxford Street |
| 4 | 2010-08-20 15:00:00 | MOTOR | 03-C-02020 | NULL |
+------+---------------------+----------+----------------+------------------+
\------ COMMON FIELDS -------/ \----- SUBT...
Node.js Mongoose.js string to ObjectId function
...a string, mongo tells me it is still just a string. The _id of the object, for instance, is displayed as objectId("blah") .
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