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Best implementation for hashCode method for a collection
...loch's Effective Java in Item 8 (second edition). The best thing is to look it up there because the author explains there why the approach is good.
A short version
Create a int result and assign a non-zero value.
For every field f tested in the equals() method, calculate a hash code c by:
If t...
vertical-align with Bootstrap 3
...ms when I want to align vertically two div , for example — JSFiddle link :
24 Answers
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ViewModel Best Practices
From this question , it looks like it makes sense to have a controller create a ViewModel that more accurately reflects the model that the view is trying to display, but I'm curious about some of the conventions (I'm new to the MVC pattern, if it wasn't already obvious).
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Is returning null bad design? [closed]
I've heard some voices saying that checking for a returned null value from methods is bad design. I would like to hear some reasons for this.
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How does a PreparedStatement avoid or prevent SQL injection?
I know that PreparedStatements avoid/prevent SQL Injection. How does it do that? Will the final form query that is constructed using PreparedStatements will be a string or otherwise?
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How does one escape backslashes and forward slashes in VIM find/search?
For instance, if I wanted to a find and replace with strings containing backward or forward slashes, how would this be accomplished in vim? Thank you!
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What is the difference between a directory and a folder?
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Check "The folder metaphor" section at Wikipedia. It states:
There is a difference between a directory, which is a file system concept, and the graphical user interface metaphor that is used to represent it (a folder). For examp...
How do I check out a remote Git branch?
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With One Remote
Jakub's answer actually improves on this. With Git versions ≥ 1.6.6, with only one remote, you can just do:
git fetch
git checkout test
As user masukomi points out in a comment, git checkout test will NOT work in modern git ...
Split column at delimiter in data frame [duplicate]
I would like to split one column into two within at data frame based on a delimiter. For example,
6 Answers
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UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...print s1
(｡･ω･｡)ﾉ
>>>
On my terminal the example works with the above, but if I get rid of the LANG setting then it won't work
$ unset LANG
$ python
Python 2.7.3 (default, Apr 20 2012, 22:39:59)
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more ...