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List vs Set vs Bag in NHibernate
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NHibernate semantics:
List: Ordered collection of entities, duplicate allowed. Use a .NET IList in code. The index column will need to be mapped in NHibernate.
Set: Unordered collection of unique entities, duplicates not allowed. Use Iesi.Collection.ISet in code (NH prior to v4...
Spring MVC type conversion : PropertyEditor or Converter?
...est and simplest way to bind and convert data in Spring MVC. If possible, without doing any xml configuration.
4 Answers
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What is the difference between the Data Mapper, Table Data Gateway (Gateway), Data Access Object (DA
...they are the same thing - encapsulate the database logic for a specific entity so the calling code has no knowledge of the underlying persistence layer. From my brief research all of them typically implement your standard CRUD methods and abstract away the database-specific details.
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How to load images dynamically (or lazily) when users scrolls them into view
I've noticed this in numerous "modern" websites (e.g. facebook and google image search) where the images below the fold load only when user scrolls down the page enough to bring them inside the visible viewport region ( upon view source, the page shows X number of <img> tags but they are not f...
Select count(*) from multiple tables
...follow
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edited Mar 5 '09 at 9:52
answered Mar 3 '09 at 12:39
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how to draw directed graphs using networkx in python?
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Fully fleshed out example with arrows for only the red edges:
import networkx as nx
import matplotlib.pyplot as plt
G = nx.DiGraph()
G.add_edges_from(
[('A', 'B'), ('A', 'C'), ('D', 'B'), ('E', 'C'), ('E', 'F'),
('B', 'H'), ('B', 'G'), ('B',...
Git clone particular version of remote repository
I cloned a remote git repository about a month ago. The remote repository has undergone many changes and has now become unstable. Now I need another copy of the repository, version identical to the one I cloned a month ago.
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How to display long messages in logcat
... message on logcat. If the length of message is more than 1000 characters, it gets broken.
10 Answers
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How to get the first five character of a String
...stFivChar = new string(yourStringVariable.Take(5).ToArray());
The plus with the approach is not checking for length before hand.
The other way is to use String.Substring with error checking
like:
string firstFivCharWithSubString =
!String.IsNullOrWhiteSpace(yourStringVariable) &&am...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
...hrow are not the same as raise/rescue. catch/throw allows you to quickly exit blocks back to a point where a catch is defined for a specific symbol, raise rescue is the real exception handling stuff involving the Exception object.
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