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Get index of array element faster than O(n)
... Hash[array.map.with_index.to_a] # => {"a"=>0, "b"=>1, "c"=>2}
hash['b'] # => 1
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Print a list in reverse order with range()?
...rameters. range(start, stop, step)
For example, to generate a list [5,4,3,2,1,0], you can use the following:
range(5, -1, -1)
It may be less intuitive but as the comments mention, this is more efficient and the right usage of range for reversed list.
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How to iterate over a JavaScript object?
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edited Nov 3 '19 at 12:50
Beachhouse
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How to pass arguments and redirect stdin from a file to program run in gdb?
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edited Dec 23 '10 at 17:32
answered Dec 23 '10 at 17:21
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Remove duplicate dict in list in Python
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How to get first and last day of previous month (with timestamp) in SQL Server
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select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0) --First day of previous month
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What is difference between sjlj vs dwarf vs seh?
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Grep characters before and after match?
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3 characters before and 4 characters after
$> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}'
23_string_and
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How can I include a YAML file inside another?
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jameshfisherjameshfisher
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What's the standard way to work with dates and times in Scala? Should I use Java types or there are
...cala_time.time.Imports._
DateTime.now // returns org.joda.time.DateTime = 2009-04-27T13:25:42.659-07:00
DateTime.now.hour(2).minute(45).second(10) // returns org.joda.time.DateTime = 2009-04-27T02:45:10.313-07:00
DateTime.now + 2.months // returns org.joda.time.DateTime = 2009-06-27T13:25:59.195-...