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What is a None value?
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101
Martijn's answer explains what None is in Python, and correctly states that the book is mislead...
What's the difference between a proc and a lambda in Ruby?
...ed.
An example:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lambda {|a, b| puts a**2+b**2 } # => #<Proc:0x15016c@(irb):5 (lambda)>
l....
How to save/restore serializable object to/from file?
...r.Serialize(stream, serializableObject);
stream.Position = 0;
xmlDocument.Load(stream);
xmlDocument.Save(fileName);
}
}
catch (Exception ex)
{
//Log exception here
}
}
/// <summary>...
What are the differences between double-dot “..” and triple-dot “…” in Git diff commit ranges?
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edited Sep 9 at 20:45
Gabriel Staples
7,28633 gold badges4848 silver badges7777 bronze badges
a...
How to force the browser to reload cached CSS/JS files?
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460
Update: Rewritten to incorporate suggestions from John Millikin and da5id. This solution is wr...
Elegant ways to support equivalence (“equality”) in Python classes
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10 Answers
10
Active
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SHA512 vs. Blowfish and Bcrypt [closed]
...millions of trials per second using equipment that costs on the order of $1000, testing all passwords up to 8 characters long in a few months.
If however, the digest output is "fed back" thousands of times, it will take hundreds of years to test the same set of passwords on that hardware. Bcrypt a...
What is the difference between Polymer elements and AngularJS directives?
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10 Answers
10
Active
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Setting environment variables on OS X
...lications/Dev/apache-ant
setenv ANT_OPTS -Xmx512M
setenv MAVEN_OPTS "-Xmx1024M -XX:MaxPermSize=512m"
setenv M2_HOME /Applications/Dev/apache-maven
setenv JMETER_HOME /Applications/Dev/jakarta-jmeter
Save your changes in vi and reboot your Mac. Or use the grep/xargs command which is shown in the c...
When should I use mmap for file access?
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303
mmap is great if you have multiple processes accessing data in a read only fashion from the sam...