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How to prevent browser page caching in Rails
...ler.rb
After Rails 5:
class ApplicationController < ActionController::Base
before_action :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Control"] = "no-cache, no-store"
response.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Mon, 01 ...
Save image from URL by paperclip
...
Here is a simple way:
require "open-uri"
class User < ActiveRecord::Base
has_attached_file :picture
def picture_from_url(url)
self.picture = open(url)
end
end
Then simply :
user.picture_from_url "http://www.google.com/images/logos/ps_logo2.png"
...
How would one write object-oriented code in C? [closed]
...n (void) {
int status;
tCommClass commTcp, commHttp;
// Same 'base' class but initialised to different sub-classes.
tcpInit (&commTcp);
httpInit (&commHttp);
// Called in exactly the same manner.
status = (commTcp.open)(&commTcp, "bigiron.box.com:5000");
...
Django URL Redirect
...
You can try the Class Based View called RedirectView
from django.views.generic.base import RedirectView
urlpatterns = patterns('',
url(r'^$', 'macmonster.views.home'),
#url(r'^macmon_home$', 'macmonster.views.home'),
url(r'^macmon_ou...
How to achieve function overloading in C?
...at it can be inserted by the C preprocessor and choose a result expression based on the type of the arguments passed to the controlling macro. So (example from the C standard):
#define cbrt(X) _Generic((X), \
long double: cbrtl, \
def...
Is there an equivalent to e.PageX position for 'touchstart' event as there is for click event?
...
I use this simple function for JQuery based project
var pointerEventToXY = function(e){
var out = {x:0, y:0};
if(e.type == 'touchstart' || e.type == 'touchmove' || e.type == 'touchend' || e.type == 'touchcancel'){
var touch = e.or...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...g>
Note thus that you should not use both ways. Use either annotation based configuarion or XML based configuration. When you have both, then XML based configuration will override annotation based configuration.
Verifying the build/deployment
In case you're using a build tool such as Eclipse ...
ActiveMQ or RabbitMQ or ZeroMQ or [closed]
...ing
written by Blaine Cook at Twitter
Starling is a Message Queue Server based on MemCached
written in Ruby
stores jobs in memory (message queue)
documentation: some good tutorials, for example the railscast about starling and workling or this blog post about starling
Kestrel
written by Robey ...
How do I overload the square-bracket operator in C#?
... what you're doing, you might find it more appropriate to do: get { return base[i]; } set { base[i] = value; }
– MikeBaz - MSFT
Oct 4 '12 at 21:58
7
...
Object of custom type as dictionary key
...s require you to "freeze" them first to avoid mutability (mutating a value-based object that has been used as a key in a python dictionary is not permitted)
– 6502
Apr 24 '16 at 7:22
...