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How to change a nullable column to not nullable in a Rails migration?
I created a date column in a previous migration and set it to be nullable. Now I want to change it to be not nullable. How do I go about doing this assuming there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
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Can someone explain the right way to use SBT?
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Most importantly is probably, how do you find the right repositories and versions to include in your project? Do I just pull out a machette and start hacking my way forward? I quite often find projects that include everything and the kitchen sink
For Scala-based dependencies, I would ...
What is the difference between -viewWillAppear: and -viewDidAppear:?
...general, this is what I do:
1) ViewDidLoad - Whenever I'm adding controls to a view that should appear together with the view, right away, I put it in the ViewDidLoad method. Basically this method is called whenever the view was loaded into memory. So for example, if my view is a form with 3 labels...
var self = this?
...lbacks for event handlers changes the scope of this from "My instance" to "Whatever just called the callback" . So my code looks like this
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Why would one use the Publish/Subscribe pattern (in JS/jQuery)?
So, a colleague introduced me to the publish/subscribe pattern (in JS/jQuery), but I'm having a hard time getting to grips with why one would use this pattern over 'normal' JavaScript/jQuery.
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How to write a multidimensional array to a text file?
...e with. However, I even fail at a basic I/O task, such as writing an array to a file.
8 Answers
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How to get process ID of background process?
I start a background process from my shell script, and I would like to kill this process when my script finishes.
7 Answers...
Remove duplicate rows in MySQL
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A really easy way to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop a...
Enabling HTTPS on express.js
I'm trying to get HTTPS working on express.js for node, and I can't figure it out.
7 Answers
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Need to log asp.net webapi 2 request and response body to a database
...am using Microsoft Asp.net WebApi2 hosted on IIS. I very simply would like to log the request body (XML or JSON) and the response body for each post.
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