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How Do I Choose Between a Hash Table and a Trie (Prefix Tree)?
... - Topics or exchanges) , in such cases if you want to filter out messages based on topics (which are actually strings) , you definitely do not want create hash table for the million subscriptions with million topics . A better approach is store the topics in trie , so when filtering is done based o...
When should I use double instead of decimal?
... missing one point. The decimal type is only more accurate at representing base 10 numbers (e.g. those used in currency/financial calculations). In general, the double type is going to offer at least as great precision (someone correct me if I'm wrong) and definitely greater speed for arbitrary rea...
JUnit: how to avoid “no runnable methods” in test utils classes
...it until after contributing another upvote that i can't remove. Make your base class abstract, then JUnit will ignore it. See @gmoore's answer below.
– Ryan Shillington
Mar 21 '17 at 21:57
...
How to call methods dynamically based on their name? [duplicate]
How can I call a method dynamically when its name is contained in a string variable? For example:
5 Answers
...
How do you version your database schema? [closed]
...
See
Is there a version control system for database structure changes?
How do I version my MS SQL database in SVN?
and Jeff's article
Get Your Database Under Version Control
I feel your pain, and I wish there were a better answer. This might be closer to what you wer...
How to handle dependency injection in a WPF/MVVM application
...gs e)
{
IocKernel.Initialize(new IocConfiguration());
base.OnStartup(e);
}
}
I have used a static IocKernel class to hold the application wide instance of the IoC kernel, so I can easily access it when needed:
public static class IocKernel
{
private static StandardKer...
How can I keep my fork in sync without adding a separate remote?
...ne:master is up to date with all commits from me:master. Try switching the base for your comparison.
Click on switching the base on this page:
Then you get to see all the commits made to someone/foobar after the day you forked it.
Click on Create pull request:
Give the pull request a title ...
Determining complexity for recursive functions (Big O notation)
...;
}
This function is being called recursively n times before reaching the base case so its O(n), often called linear.
int recursiveFun2(int n)
{
if (n <= 0)
return 1;
else
return 1 + recursiveFun2(n-5);
}
This function is called n-5 for each time, so we deduct five from...
Rails: Default sort order for a rails model?
...
default_scope
This works for Rails 4+:
class Book < ActiveRecord::Base
default_scope { order(created_at: :desc) }
end
For Rails 2.3, 3, you need this instead:
default_scope order('created_at DESC')
For Rails 2.x:
default_scope :order => 'created_at DESC'
Where created_at is the...
Getting values from query string in an url using AngularJS $location
...cationProvider) -> $locationProvider.html5Mode true ] You also need a base tag in the HTML file: <base href="/">
– Amin Ariana
Jan 18 '15 at 20:57
...