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Replace all non-alphanumeric characters in a string
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nneonneonneonneo
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How to access array elements in a Django template?
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311
Remember that the dot notation in a Django template is used for four different notations in Py...
Javascript add leading zeroes to date
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1393
Try this: http://jsfiddle.net/xA5B7/
var MyDate = new Date();
var MyDateString;
MyDate.setDa...
Plot a bar using matplotlib using a dictionary
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import matplotlib.pyplot as plt
D = {u'Label1':26, u'Label2': 17, u'Label3':30}
plt.bar(range(len(D)), list(D.values()), align='center')
plt.xticks(range(len(D)), list(D.keys()))
# # for python 2.x:
# plt.bar(range(len(D)), D.values(), align='center') # python 2.x
# plt.xticks(range(len(D)), D.k...
How is Math.Pow() implemented in .NET Framework?
...th.Log(x));
}
But not a true substitute because it accumulates error from 3 floating point operations and doesn't deal with the weirdo domain problems that Pow() has. Like 0^0 and -Infinity raised to any power.
share
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Set width of TextView in terms of characters
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3 Answers
3
Active
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Can I change the viewport meta tag in mobile safari on the fly?
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3 Answers
3
Active
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PHP: merge two arrays while keeping keys instead of reindexing?
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You can simply 'add' the arrays:
>> $a = array(1, 2, 3);
array (
0 => 1,
1 => 2,
2 => 3,
)
>> $b = array("a" => 1, "b" => 2, "c" => 3)
array (
'a' => 1,
'b' => 2,
'c' => 3,
)
>> $a + $b
array (
0 => 1,
1 => 2,
2 =&g...
How to sum a variable by group
...Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1 First 30
2 Second 5
3 Third 34
In the example above, multiple dimensions can be specified in the list. Multiple aggregated metrics of the same data type can be incorporated via cbind:
aggregate(cbind(x$Frequency, x$Metri...
Drawing a dot on HTML5 canvas [duplicate]
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143
For performance reasons, don't draw a circle if you can avoid it. Just draw a rectangle with a w...