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How do I force Postgres to use a particular index?
...t be a good query plan today probably won't be a good query plan for all time, and index hints force a particular query plan for all time.
As a very blunt hammer, useful for testing, you can use the enable_seqscan and enable_indexscan parameters. See:
Examining index usage
enable_ parameters
Th...
How do I enable gzip compression when using MVC3 on IIS7?
...namicCompression="true" />
</system.webServer>
You can find documentation of this configuration element at iis.net/ConfigReference. This is the equivalent of:
Opening Internet Information Services (IIS Manager)
Navigating through the tree-view on the left until you reach the virtual dir...
C/C++ Struct vs Class
After finishing my C++ class it seemed to me the structs/classes are virtually identical except with a few minor differences.
...
Graph visualization library in JavaScript
...graph layouting, SVG and you can even drag the nodes around. Still needs some tweaking, but is totally usable. You create nodes and edges easily with JavaScript code like this:
var g = new Graph();
g.addEdge("strawberry", "cherry");
g.addEdge("cherry", "apple");
g.addEdge("id34", "cherry");
I use...
Use ASP.NET MVC validation with jquery ajax?
... new { @class = "tb1", @Style = "width:400px;" })
@Html.ValidationMessageFor(Model => Model.EditPostViewModel.Title)
NOTE: These need to be defined within a form element
Then you would need to include the following libraries:
<script src='@Url.Content("~/Scripts/jquery.validate.js...
Applying function with multiple arguments to create a new pandas column
I want to create a new column in a pandas data frame by applying a function to two existing columns. Following this answer I've been able to create a new column when I only need one column as an argument:
...
Android: Difference between onInterceptTouchEvent and dispatchTouchEvent?
...vent to either OnTouchListener.onTouch if it's defined or to the extension method onTouchEvent.
For ViewGroup.dispatchTouchEvent things are way more complicated. It needs to figure out which one of its child views should get the event (by calling child.dispatchTouchEvent). This is basically a hit t...
How to add to an existing hash in Ruby
...an empty array, { } will create a empty hash.
Arrays have zero or more elements in a specific order, where elements may be duplicated. Hashes have zero or more elements organized by key, where keys may not be duplicated but the values stored in those positions can be.
Hashes in Ruby are very flexi...
Given a number, find the next higher number which has the exact same set of digits as the original n
...nd made pretty much zero progress on my interview question. Can anyone let me know how to do this? I tried searching online but couldn't find anything:
...
How do I enter RGB values into Interface Builder?
...p an exact color from anywhere on the screen; also see @ken's excellent comment below clarifying how colorspaces work with the magnifying glass.
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