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Where to define custom error types in Ruby and/or Rails?
...ems
I have seen many times that you define exceptions in this way:
gem_dir/lib/gem_name/exceptions.rb
and defined as:
module GemName
class AuthenticationError < StandardError; end
class InvalidUsername < AuthenticationError; end
end
an example of this would be something like th...
The name 'model' does not exist in current context in MVC3
... key="webpages:Version" value="3.0.0.0" />
– Simon_Weaver
May 26 '14 at 22:04
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How to fix the uninitialized constant Rake::DSL problem on Heroku?
...
Put this in your Rakefile above require 'rake':
require 'rake/dsl_definition'
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Handling specific errors in JavaScript (think exceptions)
...
try-catch-finally.js
Using try-catch-finally.js, you can call the _try function with an anonymous callback, which it will call, and you can chain .catch calls to catch specific errors, and a .finally call to execute either way.
Example
_try(function () {
throw 'My error';
})
.catch(Erro...
What is the difference between native code, machine code and assembly code?
...on to this it does go directly to machine code.
– old_timer
Aug 12 '10 at 16:49
This feels like nitpicking, but not al...
How to clear the cache in NetBeans
...ns\Cache\
NetBeans 7.2+, Linux
Cache is at: ~/.cache/netbeans/${netbeans_version}/index/
Mac OS X
Cache is at: ~/Library/Caches/NetBeans/${netbeans_version}/
See also http://wiki.netbeans.org/FaqWhatIsUserdir.
Help Menu
On Windows, selecting the Help » About menu will display a dialog that ...
Can I use git diff on untracked files?
...es by simply supplying the path to both files.
git diff --no-index tracked_file untracked_file
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lenses, fclabels, data-accessor - which library for structure access and mutation is better
... a -> a)
providing two functions: a getter, and a setter
get (Lens g _) = g
put (Lens _ s) = s
subject to three laws:
First, that if you put something, you can get it back out
get l (put l b a) = b
Second that getting and then setting doesn't change the answer
put l (get l a) a = a
A...
Can I get JSON to load into an OrderedDict?
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Yes, you can. By specifying the object_pairs_hook argument to JSONDecoder. In fact, this is the exact example given in the documentation.
>>> json.JSONDecoder(object_pairs_hook=collections.OrderedDict).decode('{"foo":1, "bar": 2}')
OrderedDict([('foo',...
Can Selenium Webdriver open browser windows silently in background?
...river
from selenium.webdriver.chrome.options import Options
CHROME_PATH = '/usr/bin/google-chrome'
CHROMEDRIVER_PATH = '/usr/bin/chromedriver'
WINDOW_SIZE = "1920,1080"
chrome_options = Options()
chrome_options.add_argument("--headless")
chrome_options.add_argument(...