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Numbering rows within groups in a data frame
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edited Mar 14 '17 at 22:06
Frank
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Is there a standardized method to swap two variables in Python?
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401
Python evaluates expressions from left to right. Notice that while
evaluating an assignment...
Jasmine.js comparing arrays
...n() {
it('passes if arrays are equal', function() {
var arr = [1, 2, 3];
expect(arr).toEqual([1, 2, 3]);
});
});
Just for information:
toBe() versus toEqual(): toEqual() checks equivalence. toBe(), on the
other hand, makes sure that they're the exact same object.
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Test for equality among all elements of a single vector
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10 Answers
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How to extract a floating number from a string [duplicate]
I have a number of strings similar to Current Level: 13.4 db. and I would like to extract just the floating point number. I say floating and not decimal as it's sometimes whole. Can RegEx do this or is there a better way?
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What is the proper way to test if a parameter is empty in a batch file?
...et or not. I've tried several techniques but they seem to fail whenever %1 is surrounded by quotes such as the case when %1 is "c:\some path with spaces" .
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How do I profile memory usage in Python?
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123
This one has been answered already here: Python memory profiler
Basically you do something li...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
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166
First, note that this behavior applies to any default value that is subsequently mutated (e.g....
Python division
I was trying to normalize a set of numbers from -100 to 0 to a range of 10-100 and was having problems only to notice that even with no variables at all, this does not evaluate the way I would expect it to:
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Rspec: “array.should == another_array” but without concern for order
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answered Jun 5 '10 at 3:08
x1a4x1a4
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