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Which is the fastest algorithm to find prime numbers?
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mmcdole
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answered Jan 17 '09 at 18:45
Greg Hewgil...
Extracting the last n characters from a ruby string
...a one liner, you can put a number greater than the size of the string:
"123".split(//).last(5).to_s
For ruby 1.9+
"123".split(//).last(5).join("").to_s
For ruby 2.0+, join returns a string
"123".split(//).last(5).join
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What is the fastest method for selecting descendant elements in jQuery?
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How to import multiple .csv files at once?
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13 Answers
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How to find all positions of the maximum value in a list?
...ored in big O
– michaelsnowden
Oct 23 '15 at 8:06
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Theoretically O(N) and O(2N) are the same but...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...n or darken a hex color by a specific amount. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
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How to append multiple values to a list in Python
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You can use the sequence method list.extend to extend the list by multiple values from any kin...
GroupBy pandas DataFrame and select most common value
...ata frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
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How can I check the system version of Android?
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Int division: Why is the result of 1/3 == 0?
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The two operands (1 and 3) are integers, therefore integer arithmetic (division here) is used. Declaring the result variable as double just causes an implicit conversion to occur after division.
Integer division of course returns the true result of...