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What is Rack middleware?
...equest. Rack allows you to add multiple middlewares that are called in the order they are added. It's just a great way to add functionality without changing the core of the rack application.
Rack - The Gem
Although rack - first of all - is a convention it also is a gem that provides great function...
Why should I use the keyword “final” on a method parameter in Java?
...lass and the method seeing changes the other one makes to the variable. In order to maintain the illusion that there is only one variable rather than two copies, it has to be final.
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How to Update Multiple Array Elements in mongodb
...ave to be searched, and have to load all of them (or the nested arrays) in order to update... + also a bit troublesome to implement if this has to be done asynchronously...
– Ixx
Oct 1 '13 at 20:24
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How to use concerns in Rails 4
... the idea is to extract common and / or context specific chunks of code in order to clean up the models and avoid them getting too fat and messy.
As an example, I'll put one well known pattern, the taggable pattern:
# app/models/product.rb
class Product
include Taggable
...
end
# app/models/...
Why does the default parameterless constructor go away when you create one with parameters
...static class, I most likely want to be able to instantiate that class. In order to allow that, the compiler must add a parameterless constructor, which will have no effect but to allow instantiation. This means that I don't have to include an empty constructor in my code just to make it work.
If I...
Directive isolate scope with ng-repeat scope in AngularJS
...n't be trying to change this.
Priority in directives isn't just execution order - see: AngularJS : How does the HTML compiler arrange the order for compiling?
In Batarang, if you check the performance tab, you can see the expressions bound for each scope, and check if this matches your expectations...
How Do I Fetch All Old Items on an RSS Feed?
...moment and someone would need to be actively collecting this informaton in order to have any historical information. Basically Google Reader was doing this for free and when you interacted with it you could retrieve this stored informaton from the google database servers.
Now that they have reti...
Quickly reading very large tables as dataframes
...e end object is a data frame. So you have to convert it to a zoo object in order to use it with zoo. Look at the examples in the zoo docs for illustrations.
– JD Long
Apr 2 '13 at 12:48
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Why use the params keyword?
...ntees prevention of unintended values passed to Parameters after Parameter order, Compatible-Type and/or count change after Calls have been coded,
1.2. it reduces those chances after a Parameter meaning change, because the likely new identifier name reflecting the new meaning is right next to the v...
How to delete an old/unused Data Model Version in Xcode
...7.xcdatamodel". I wanted to delete 38. On import, it was pulled in lexical order, meaning "MY_APP 10.xcdatamodel" was first, and selected as the default. Not ideal in my case.
– Mike
Nov 16 '12 at 5:46
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