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Transform DateTime into simple Date in Ruby on Rails
...o_date
NoMethodError: undefined method 'to_date' for #<DateTime: -1/2,0,2299161>
from (irb):1
>> require 'active_support/core_ext'
=> true
>> DateTime.new.to_date
=> Mon, 01 Jan -4712
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Python UTC datetime object's ISO format doesn't include Z (Zulu or Zero offset)
...gt; datetime.utcnow().replace(tzinfo=simple_utc()).isoformat()
'2014-05-16T22:51:53.015001+00:00'
Note that this DOES conform to the ISO 8601 format, which allows for either Z or +00:00 as the suffix for UTC. Note that the latter actually conforms to the standard better, with how time zones are re...
Big-oh vs big-theta [duplicate]
... given context.
For example, when considering a function T(n) = 73n3+ 22n2+ 58, all of the following are generally acceptable, but tightness of bound (i.e., bullets 2 and 3 below) are usually strongly preferred over laxness of bound (i.e., bullet 1
below).
T(n) = O(n100), which is ide...
What is a simple command line program or script to backup SQL server databases?
...asp?tip=1070
– Marnix van Valen
Sep 22 '09 at 14:47
7
The documentation says that WITH FORMAT for...
What is a unix command for deleting the first N characters of a line?
...issue.
– Steen Schütt
Jul 7 '14 at 22:25
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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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227
Tested & Working Version
User.select(:first,:email).group(:first,:email).having("count(*)...
SQL select join: is it possible to prefix all columns as 'prefix.*'?
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How to apply unmerged upstream pull requests from other forks into my fork?
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CharlesBCharlesB
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JavaScript listener, “keypress” doesn't detect backspace?
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jezrael
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answered Jan 30 '11 at 14:49
Kris IvanovKris Ivanov
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How to change color in circular progress bar?
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