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Javascript and regex: split string and keep the separator
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Use (positive) lookahead so that the regular expression asserts that the special character exi...
CSS I want a div to be on top of everything
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In order for z-index to work, you'll need to give the element a position:absolute or a positio...
SQL Server 2008 Windows Auth Login Error: The login is from an untrusted domain
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Cluster analysis in R: determine the optimal number of clusters
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If your question is how can I determine how many clusters are appropriate for a kmeans analys...
How can I perform a culture-sensitive “starts-with” operation from the middle of a string?
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I'll con...
How to create a sequence of integers in C#?
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You can use Enumerable.Range(0, 10);. Example:
var seq = Enumerable.Range(0, 10);
MSDN page here.
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How do I create test and train samples from one dataframe with pandas?
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I would just use numpy's randn:
In [11]: df = pd.DataFrame(np.random.randn(100, 2))
In [12]: msk = np.random.rand(len(df)) < 0.8
In [13]: train = df[msk]
In [14]: test = df[~msk]
And just to see this has worked:
In [15]: len(test)
Out[15]: 21
In [16]:...
Logging framework incompatibility
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You are mixing the 1.5.6 version of the jcl bridge with the 1.6.0 version of the slf4j-api; th...
Divide a number by 3 without using *, /, +, -, % operators
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What does |= (ior) do in Python?
...or. See examples below.
Sets
For example, the union of two assigned sets s1 and s2 share the following equivalent expressions:
>>> s1 = s1 | s12 # 1
>>> s1 |= s2 # 2
>>> s1.__ior__(s2) ...