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What is the difference between 'java', 'javaw', and 'javaws'?
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From http://publib.boulder.ibm.com/infocenter/javasdk/v6r0/index.jsp?topic=%2Fcom.ibm.java.doc.user.aix32.60%2Fuser%2Fjava.html:
The javaw command is identical to java, except that javaw has no associated console window. Use j...
How can I check that a form field is prefilled correctly using capybara?
...(e.g. 'John'):
expect(page).to have_xpath("//input[@value='John']")
See http://www.w3schools.com/xpath/xpath_syntax.asp for more info.
For perhaps a prettier way:
expect(find_field('Your name').value).to eq 'John'
EDIT: Nowadays I'd probably use have_selector
expect(page).to have_selector("i...
How can I create a correlation matrix in R?
...lot
corrplot(M, method = "circle") #plot matrix
More information here: http://cran.r-project.org/web/packages/corrplot/vignettes/corrplot-intro.html
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Resize image proportionally with MaxHeight and MaxWidth constraints
...Source = i;
} while (i.Pixels.Length / 1024 > 100);
More Reference at http://net4attack.blogspot.com/
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Difference between shadowing and overriding in C#?
...ot the accessibility and signature (e.g. parameter types and return). See http://www.geekinterview.com/question_details/19331 .
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How do I automatically sort a has_many relationship in Rails?
...hem too.
@article.comments.find(:all, :order => "created_at DESC")
http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html
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Process all arguments except the first one (in a bash script)
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http://wiki.bash-hackers.org/scripting/posparams
It explains the use of shift (if you want to discard the first N parameters) and then implementing Mass Usage
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How to deploy an ASP.NET Application with zero downtime
... the IIS metabase:
for an existing path/url:
path: \web\app\v2.0\
url: http://app
Copy new (or modified) website to server under
\web\app\v2.1\
Modify IIS metabase to change the website path
from \web\app\2.0\
to \web\app\v2.1\
This method offers the following benefits:
In the event n...
Why are my basic Heroku apps taking two seconds to load?
...ut Tom Robinson's answer to "Scalability: How Does Heroku Work?" on Quora: http://www.quora.com/Scalability/How-does-Heroku-work
Heroku divides up server resources among many different customers/applications. Your app is allotted blocks of computing power. Heroku partitions based on resource demand...
Exit a Script On Error
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Are you looking for exit?
This is the best bash guide around.
http://tldp.org/LDP/abs/html/
In context:
if jarsigner -verbose -keystore $keyst -keystore $pass $jar_file $kalias
then
echo $jar_file signed sucessfully
else
echo ERROR: Failed to sign $jar_file. Please recheck the...