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psql: FATAL: database “” does not exist
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answered Jul 29 '13 at 23:40
Kirk RoybalKirk Roybal
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How to correct TypeError: Unicode-objects must be encoded before hashing?
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321
It is probably looking for a character encoding from wordlistfile.
wordlistfile = open(wordli...
Behaviour of increment and decrement operators in Python
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answered Sep 28 '09 at 7:39
Chris LutzChris Lutz
63.9k1515 gold badges117117 silver badges176176 bronze badges
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Simple explanation of MapReduce?
...hem back in the same kind of list.
suppose I have a list of numbers: [1,2,3] and I want to double every number, in this case, the function to "double every number" is function x = x * 2. And without mappings, I could write a simple loop, say
A = [1, 2, 3]
foreach (item in A) A[item] = A[item] * 2
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How to convert an array of strings to an array of floats in numpy?
... list_of_strings)) (or equivalently, use a list comprehension). (In Python 3, you'll need to call list on the map return value if you use map, since map returns an iterator now.)
However, if it's already a numpy array of strings, there's a better way. Use astype().
import numpy as np
x = np.array...
Windows 7 SDK installation failure
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539
Microsoft now has a knowledge base article called Windows SDK Fails to Install with Return Code...
How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
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edited Jul 23 '14 at 19:10
answered Nov 26 '09 at 5:09
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What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
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193
In this two queries, you are using JOIN to query all employees that have at least one department...
Using awk to print all columns from the nth to the last
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edited Apr 8 '15 at 13:01
fedorqui 'SO stop harming'
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count vs length vs size in a collection
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231
Length() tends to refer to contiguous elements - a string has a length for example.
Count() t...