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Finding the index of elements based on a condition using python list comprehension

...t all, but just deal with the values—[value for value in a if value > 2]. Usually dealing with indexes means you're not doing something the best way. If you do need an API similar to Matlab's, you would use numpy, a package for multidimensional arrays and numerical math in Python which is heavi...
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How to print to console in pytest?

... 226 By default, py.test captures the result of standard out so that it can control how it prints i...
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Export Postgresql table data using pgAdmin

... | edited Nov 25 '16 at 15:06 Alfonso Tienda 2,72511 gold badge1313 silver badges2727 bronze badges ...
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Why does parseInt yield NaN with Array#map?

... element. In this case, you ended up calling parseInt with radix 0, 1 and 2 in turn. The first is the same as not supplying the parameter, so it defaulted based on the input (base 10, in this case). Base 1 is an impossible number base, and 3 is not a valid number in base 2: parseInt('1', 0); // ...
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What is the easiest way to push an element to the beginning of the array?

...elf, moving other elements upwards. And in use: irb>> a = [ 0, 1, 2] => [0, 1, 2] irb>> a.unshift('x') => ["x", 0, 1, 2] irb>> a.inspect => "["x", 0, 1, 2]" share | im...
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What does the tilde (~) mean in my composer.json file?

...de means next significant release. In your case, it is equivalent to >= 2.0, < 3.0. The full explanation is at Tilde Version Range docs page: The ~ operator is best explained by example: ~1.2 is equivalent to >=1.2 <2.0.0, while ~1.2.3 is equivalent to >=1.2.3 <1.3.0. Ano...
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Converting a column within pandas dataframe from int to string

... 142 In [16]: df = DataFrame(np.arange(10).reshape(5,2),columns=list('AB')) In [17]: df Out[17]: ...
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Rank function in MySQL

... 270 One option is to use a ranking variable, such as the following: SELECT first_name, ...
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Custom Python list sorting

... Charlie 6,5234545 silver badges5050 bronze badges answered Aug 7 '12 at 16:44 miles82miles82 ...
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How do I find if a string starts with another string in Ruby?

... 263 puts 'abcdefg'.start_with?('abc') #=> true [edit] This is something I didn't know before...