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Java serialization: readObject() vs. readResolve()
The book Effective Java and other sources provide a pretty good explanation on how and when to use the readObject() method when working with serializable Java classes. The readResolve() method, on the other hand, remains a bit of a mystery. Basically all documents I found either mention only one o...
Change a Rails application to production
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How to setup and run a Rails 4 app in Production mode (step-by-step) using Apache and Phusion Passenger:
Normally you would be able to enter your Rails project, rails s, and get a development version of your app at http://something.com:3...
HTML.ActionLink method
... Has anyone tried this with MVC 3? It seems that the ControllerName and ActionMethod lines in the sample above are flipped. Anyone else seen that?
– Steve Duitsman
Sep 9 '10 at 20:50
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Java array reflection: isArray vs. instanceof
...u might, for example, be implementing some sort of serialization mechanism and be able to pass each component of the array to the same serialization method, regardless of type.
There are two special cases: null references and references to primitive arrays.
A null reference will cause instanceof t...
How can I get the length of text entered in a textbox using jQuery?
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For me its not text box its a span tag and this worked for me.
var len = $("span").text().length;
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How can I detect if a selector returns null?
...See my answer porting Rails' presence method.
– Marc-André Lafortune
Feb 26 '13 at 22:22
5
If yo...
Rails check if yield :area is defined in content_for
...d %>
I use this all the time to conditionally go between a one column and two column layout
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Git format-patch to be svn compatible?
...ch with git diff --no-prefix master..branch > somefile.diff, the master and branch part are optional, depends how you want to get your diffs.
Send it wherever and apply with patch -p0 < somefile.diff.
It always seems to work fine for me and seems to be the simplest method that I've come acr...
Rails - How to use a Helper Inside a Controller
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Note: This was written and accepted back in the Rails 2 days; nowadays grosser's answer is the way to go.
Option 1: Probably the simplest way is to include your helper module in your controller:
class MyController < ApplicationController
inc...
Controlling mouse with Python
...s one control the mouse cursor in Python, i.e. move it to certain position and click, under Windows?
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