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How to make graphics with transparent background in R using ggplot2?
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If you don't set the plot.background color like the answer above your plot will have a faint outline.
– jsta
Mar 15 '18 at 22:15
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Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
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I like that approach! If someone likes keep things close to processing dictionaries, one could also use update() instead of +=: for c in counters[1:]: res.update(c).
– Dr. Jan-Philip Gehrcke
Jan 22 '15 at 21:...
How to insert an item at the beginning of an array in PHP?
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Use array_unshift($array, $item);
$arr = array('item2', 'item3', 'item4');
array_unshift($arr , 'item1');
print_r($arr);
will give you
Array
(
[0] => item1
[1] => item2
[2] => item3
[3] => item4
)
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Substitute multiple whitespace with single whitespace in Python [duplicate]
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A simple possibility (if you'd rather avoid REs) is
' '.join(mystring.split())
The split and join perform the task you're explicitly asking about -- plus, they also do the extra one that you don't talk about but is seen in your example, removin...
GraphViz - How to connect subgraphs?
... In case anyone is interested in, this can cause positioning problems if you have labelled links (edges). While the head or the tail of the edge may be hidden beneath a cluster, the label is still positioned at the midpoint, meaning some edge labels appear to be floating over a cluster instead ...
Guava: Why is there no Lists.filter() function?
...ppose it could require that the predicate matching didn't change over the lifetime of the view, but that would be not-entirely-satisfactory.
(This is just guessing, mind you. Maybe one of the Guava maintainers will chip in with the real reason :)
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When is assembly faster than C?
...(float only has 23 bit and it's harder to predict precision loss). i.e. uniform absolute precision over the entire range, instead of close-to-uniform relative precision (float).
Modern compilers optimize this fixed-point example nicely, so for more modern examples that still need compiler-specif...
What is float in Java?
...ess precise than a double, the conversion cannot be performed implicitly.
If you want to create a float, you should end your number with f (i.e.: 3.6f).
For more explanation, see the primitive data types definition of the Java tutorial.
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How do I set up a basic Ruby project?
...wed by most Ruby developers.
I would only create custom exception classes if I wasn't able to find any class in the standard library fits the error description. Nest your error class under the class or module that raises it:
class Parser::Error < RuntimeError; end
begin
Parser.new(:invalid)....
Best way to extract a subvector from a vector?
...egRogers: It doesn't make sense to use the big-O notation where N is a specific number. Big-O communicates the rate of growth with respect to how N changes. Johann: It's best not to use one variable name in two ways. We'd normally say either O(Y-X), or we'd say O(Z) where Z=Y-X.
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