Array TypeError: can't convert Fixnum into String?

I am experimenting with arrays, and am reading the book "Beginning Ruby on Rails" by Steve Holzner. I made the progr...

Apache: how can I access my webpage from a computer outside my network??

I want to access my webpage from a computer outside the network. Our network has IPs like 192.168.0.1-192.168.0.255....

How do I get the name of a Ruby class??

How can I get the class name from an ActiveRecord object? I have: result = User.find(1) I tried: result.class #...

What is meant by Ems? (Android TextView)?

What is meant by Ems (related to a TextView)? For example in android:ems setEms(int) Makes the TextView be ex...

Javascript Excel OpenFile?

I have this code: <html> <script type="text/javascript"> function test() { var Excel = new ...

How do I grep for all non-ASCII characters??

I have several very large XML files and I'm trying to find the lines that contain non-ASCII characters. I've tried t...

What is “self” used for in Swift??

I am new to Swift and I'm wondering what self is used for and why. I have seen it in classes and structures but I r...

Installing tkinter on ubuntu 14.04?

I want to run python code on Ubuntu 14.04, but when I execute it, it gives me the following error message Traceback...

jQuery Mobile “Error Loading Page”?

I am using Jquery1.8.2 and Jquery-mobile 1.1 When i click on Logout button i have to goto the Home page. I am able ...

How to rename array keys in PHP??

When I var_dump on a variable called $tags (a multidimensional array) I get this: Array ( [0] => Array ...

Change the X-Frame-Options to allow all domains?

I am trying to use some site of mine as an iframe from a different site of mine. My problem is- the other site is a...

Create random shape/contour using matplotlib?

I am trying to generate an image of a random contour using python but I couldn't find an easy way to do it. Here is...

AS3: Random Point on Irregular Shape?

I have a MovieClip holding an irregular shape such as this one: I need to generate a random point on this shape. ...

Creating a random shape (blob) of a given area in NetLogo?

Is it possible to create random shapes (see below for example) of a given area in NetLogo? ...