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What is a “feature flag”?
...(or Feature Toggle) is the ability to turn features (sub-sections) of your application on/off at easily:
perhaps via a re-deploy, or
some internal page where pages/features can be toggled live.
I guess the example there was that it's handy to have the control to reduce the feature-set somewhat ...
Heroku Postgres - terminate hung query (idle in transaction)
..."friendly" request to cancel the 1234-query, and with some luck it will disappear after a while. Eventually, this is more efficient:
select pg_terminate_backend(1234);
If you have shell access and root or postgres permissions you can also do it from the shell. To "cancel" one can do:
kill -INT...
How to use NSCache
... of methods
// that use it. For example, you could make it a field of your application
// delegate, or of your view controller, or something like that. Up to you.
NSCache *myCache = ...;
NSAssert(myCache != nil, @"cache object is missing");
// Try to get the existing object out of the cache, if it'...
What does addChildViewController actually do?
...2011 videos and Mr. View Controller, Bruce D. Nilo, said this:
viewWillAppear:, viewDidAppear:, etc have nothing to do with addChildViewController:. All that addChildViewController: does is to say "This view controller is a child of that one" and it has nothing to do with view appearance. When t...
Rails - Could not find a JavaScript runtime?
...was a bit hairy as this didn't fix it right away and I was also trying new apps with 3.0.9 and 3.0.4 but got (different) errors with them. Finally I did a new app again - and also got rails rc5 with it and added the rubytheracer and did a bunlde update and finally I can get the server up and running...
SQL Server - transactions roll back on error?
We have client app that is running some SQL on a SQL Server 2005 such as the following:
5 Answers
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Visual List of iOS Fonts?
I am looking for a list of iOS Fonts for iOS 7. I have found the list on Apple's developer site, I am just wondering if anyone knows of a visual list where each font name is typed out in its typeface. I have seen one or two before, but the latest one I have seen was for iOS 5, and much more has be...
Token Authentication vs. Cookies
...
A typical web app is mostly stateless, because of its request/response nature. The HTTP protocol is the best example of a stateless protocol. But since most web apps need state, in order to hold the state between server and client, cookies...
Callback when CSS3 transition finishes
...t be handy for, here is a jQuery dependent function I had success with for applying a CSS animation via a CSS class, then getting a callback from afterwards. It may not work perfectly since I had it being used in a Backbone.js App, but maybe useful.
var cssAnimate = function(cssClass, callback) {
...
How can I get a favicon to show up in my django app?
... favicon.ico in my staticfiles directory and then have it show up in my app.
12 Answers
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