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How to get a number of random elements from an array?
...nt for sampling from a
large population: sample(range(10000000), 60)
Sampling without replacement entails tracking either potential
selections (the pool) in a list or previous selections in a set.
When the number of selections is small compared to the
popu...
partial string formatting
...
60
You can trick it into partial formatting by overwriting the mapping:
import string
class Form...
Check if a given key already exists in a dictionary and increment it
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60
I personally like using setdefault()
my_dict = {}
my_dict.setdefault(some_key, 0)
my_dict[som...
How to append to a file in Node?
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Does anyone know if fs.appendFile keeps a link to the file open so appends are faster? (rather than open/close each write) nodejs.org/api/...
Cross-Origin Request Headers(CORS) with PHP headers
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Access-Control-Allow-Headers does not allow * as accepted value, see the Mozilla Documentation ...
How to cancel/abort jQuery AJAX request?
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@romkyns The differences is the property readystate above and readyState below, the character s is capitalized in jQuery 1.5
...
How should I use git diff for long lines?
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related tip, use --word-diff to see a color-coded highlighting of changed words
– Josh Diehl
Dec 6 '...
How to lay out Views in RelativeLayout programmatically?
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Cut the long story short:
With relative layout you position elements inside the layout.
creat...
The most accurate way to check JS object's type?
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the Object.prototype.toString is a good way, but its performance is the worst.
http://jsperf.c...
Can you have multiline HTML5 placeholder text in a ?
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I find that if you use a lot of spaces, the browser will wrap it properly. Don't worry about us...