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Why does isNaN(“ ”) (string with spaces) equal false?
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JavaScript interprets an empty string as a 0, which then fails the isNAN test. You can use parseInt on the string first which won't convert the empty string to 0. The result should then fail isNAN.
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Changing a specific column name in pandas DataFrame
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A one liner does exist:
In [27]: df=df.rename(columns = {'two':'new_name'})
In [28]: df
Out[28]:
one three new_name
0 1 a 9
1 2 b 8
2 3 c 7
3 4 d 6
4 5 e 5
Following is the docstring for the rename method.
De...
Checking the equality of two slices
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You need to loop over each of the elements in the slice and test. Equality for slices is not defined. However, there is a bytes.Equal function if you are comparing values of type []byte.
func testEq(a, b []Type) bool {
// If one is nil, the other must also be nil.
if (a == n...
Large-scale design in Haskell? [closed]
...Int, Address)
Good data structures (like zippers) can make some classes of testing needless, as they rule out e.g. out of bounds errors statically.
The profiler
Provide objective evidence of your program's heap and time profiles.
Heap profiling, in particular, is the best way to ensure no unnece...
Comments in Markdown
...atform-independent it also needs an empty line before the comment. See the tests: stackoverflow.com/a/32190021/2790048
– Nick Volynkin
Aug 24 '15 at 19:18
6
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How do I sort a vector of pairs based on the second element of the pair?
...response to your edits to your question, here's some thoughts ...
if you really wanna be creative and be able to reuse this concept a lot, just make a template:
template <class T1, class T2, class Pred = std::less<T2> >
struct sort_pair_second {
bool operator()(const std::pair<T1...
What is the purpose of Verifiable() in Moq?
...ct that achieving those goals has on the legibility and maintainability of tests which lean too much on such constructs"
ORIGINAL: Note that where possible, one should instead follow the AAA layout and hence one should be doing explicit mock.Verify( expression ) calls after the work has been done, ...
Best way to compare two complex objects
... a huge cost. You're generating a data stream, appending strings, and then testing string equality. Orders of magnitude, just in that. Not to mention serialization is going to be using reflection by default.
– Jerome Haltom
May 19 '17 at 15:06
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$PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions
...imilar errors. This is on MAC OS X 10.7.3 (lion) and I also have XCODE installed on it. I also installed Zend Server community edition before running these commands and have CFLAGS='-arch i386 -arch x86_64' environment variables set. So please help with what I need to do
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How to run Selenium WebDriver test cases in Chrome?
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Outdated again on 23 March. Unable to use on the latest Chrome.
– willem
Mar 23 '17 at 9:20
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