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Convert to/from DateTime and Time in Ruby
How do you convert between a DateTime and a Time object in Ruby?
6 Answers
6
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Truncating floats in Python
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First, the function, for those who just want some copy-and-paste code:
def truncate(f, n):
'''Truncates/pads a float f to n decimal places without rounding'''
s = '{}'.format(f)
if 'e' in s or 'E' in s:
return '{0:.{1}f}'.format(f, n)
i, p, d = s.partitio...
What is the use of Enumerable.Zip extension method in Linq?
...ative. B) Write a method to yield return each element of the shorter list, and then continue yield returning default indefinitely thereafter. (Option B requires you to know in advance which list is shorter.)
– jpaugh
Jul 7 '17 at 21:41
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Array Size (Length) in C#
...nt[,] b = new int[3, 5];)
b.Rank
will give the number of dimensions (2) and
b.GetLength(dimensionIndex)
will get the length of any given dimension (0-based indexing for the dimensions - so b.GetLength(0) is 3 and b.GetLength(1) is 5).
See System.Array documentation for more info.
As @Lucero ...
What is the difference between trie and radix trie data structures?
Are the trie and radix trie data structures the same thing?
3 Answers
3
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What is the fastest way to get the value of π?
... fastest π I know of is the one with the digits hard coded. Looking at Pi and Pi[PDF], there are a lot of formulae.
Here is a method that converges quickly — about 14 digits per iteration. PiFast, the current fastest application, uses this formula with the FFT. I'll just write the formula, since...
How to replace captured groups only?
I have HTML code before and after the string:
5 Answers
5
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find vs find_by vs where
...is used as a helper when you're searching for information within a column, and it maps to such with naming conventions. For instance, if you have a column named name in your database, you'd use the following syntax:
Model.find_by(name: "Bob")
.where is more of a catch all that lets you use a bit...
fatal: early EOF fatal: index-pack failed
I have googled and found many solutions but none work for me.
31 Answers
31
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How can I export tables to Excel from a webpage [closed]
...s to Excel from a webpage. I want the export to contain all the formatting and colours.
14 Answers
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