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ggplot2 keep unused levels barplot
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answered Apr 2 '14 at 20:23
JarretinhaJarretinha
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How do I setup a SSL certificate for an express.js server?
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3 Answers
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What would cause an algorithm to have O(log n) complexity?
...o have that log2 16 = 4. Hmmm... what about 128?
128 / 2 = 64
64 / 2 = 32
32 / 2 = 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
This took seven steps, and log2 128 = 7. Is this a coincidence? Nope! There's a good reason for this. Suppose that we divide a number n by 2 i times. Then...
How to uncompress a tar.gz in another directory
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You can use the option -C (or --directory if you prefer long options) to give the target direc...
Use curly braces to initialize a Set in Python
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103
There are two obvious issues with the set literal syntax:
my_set = {'foo', 'bar', 'baz'}
It'...
Does Internet Explorer support pushState and replaceState?
... section on history.
Summary - IE9: no, IE10: yes (as of platform preview 3)
The first Release Candidate of IE9 (released 10th Feb 2011) does not support history.pushState or history.replaceState. Generally no new features are added after a product gets to RC stage so it is very unlikely that the ...
Rails: redirect_to with :error, but flash[:error] empty
I'm trying to do a redirect while setting the flash[:error] value. (Rails 3.0.10)
3 Answers
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Booleans, conditional operators and autoboxing
...nd operand to boolean)
E2: `true ? null : false` - Boolean (autoboxing of 3rd operand to Boolean)
See Java Language Specification, section 15.25 Conditional Operator ? :
For E1, the types of the 2nd and 3rd operands are Boolean and boolean respectively, so this clause applies:
If one of the...
Using querySelector with IDs that are numbers
...Unicode code point. For example, the code point for the character 1 is U+0031, so you would escape it as \000031 or \31 .
Basically, to escape any numeric character, just prefix it with \3 and append a space character ( ). Yay Unicode!
So your code would end up as (CSS first, JS second):
#\3...
Mockito match any class argument
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answered Oct 7 '11 at 3:59
millhousemillhouse
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