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How to implement a queue with three stacks?
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SUMMARY
O(1) algorithm is known for 6 stacks
O(1) algorithm is known for 3 stacks, but using lazy evaluation which in practice corresponds to having extra internal data structures, so it does not constitute a solution
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Sorting a Python list by two fields
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162
like this:
import operator
list1 = sorted(csv1, key=operator.itemgetter(1, 2))
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Can I bind an array to an IN() condition?
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21 Answers
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How to escape braces (curly brackets) in a format string in .NET
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10 Answers
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Looping through a hash, or using an array in PowerShell
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108
Christian's answer works well and shows how you can loop through each hash table item using th...
type object 'datetime.datetime' has no attribute 'datetime'
...b/python2.6/lib-dynload/datetime.so'>
>>> datetime.datetime(2001,5,1)
datetime.datetime(2001, 5, 1, 0, 0)
But, if you import datetime.datetime:
>>> from datetime import datetime
>>> datetime
<type 'datetime.datetime'>
>>> datetime.datetime(2001,5,1) # ...
How to get random value out of an array?
I have an array called $ran = array(1,2,3,4);
20 Answers
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How to remove a field completely from a MongoDB document?
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14 Answers
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