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How to filter a dictionary according to an arbitrary condition function?
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Nowadays, in Python 2.7 and up, you can use a dict comprehension:
{k: v for k, v in points.iteritems() if v[0] < 5 and v[1] < 5}
And in Python 3:
{k: v for k, v in points.items() if v[0] < 5 and v[1] < 5}
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Get the first N elements of an array?
...ve_keys flag set to trueto avoid this. (4th parameter, available since 5.0.2).
Example:
$output = array_slice($input, 2, 3, true);
Output:
array([3]=>'c', [4]=>'d', [5]=>'e');
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Get item in the list in Scala?
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Use parentheses:
data(2)
But you don't really want to do that with lists very often, since linked lists take time to traverse. If you want to index into a collection, use Vector (immutable) or ArrayBuffer (mutable) or possibly Array (which is j...
How to remove gaps between subplots in matplotlib?
...figure(figsize = (4,4))
gs1 = gridspec.GridSpec(4, 4)
gs1.update(wspace=0.025, hspace=0.05) # set the spacing between axes.
for i in range(16):
# i = i + 1 # grid spec indexes from 0
ax1 = plt.subplot(gs1[i])
plt.axis('on')
ax1.set_xticklabels([])
ax1.set_yticklabels([])
ax1...
What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java
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125
I'll disagree with Chris's answer in one regard. The classes Any, AnyRef and AnyVal are classes...
android.view.InflateException: Binary XML file line #12: Error inflating class
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How does a Breadth-First Search work when looking for Shortest Path?
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edited Dec 1 '14 at 21:34
marzapower
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UnicodeDecodeError, invalid continuation byte
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262
In binary, 0xE9 looks like 1110 1001. If you read about UTF-8 on Wikipedia, you’ll see that ...
Find number of months between two Dates in Ruby on Rails
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