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Select statement to find duplicates on certain fields
... which there are multiple records, you can use..
select field1,field2,field3, count(*)
from table_name
group by field1,field2,field3
having count(*) > 1
Check this link for more information on how to delete the rows.
http://support.microsoft.com/kb/139444
There should be a criterion for de...
What is the 'pythonic' equivalent to the 'fold' function from functional programming?
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edited Sep 21 '19 at 0:30
goetzc
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answered Apr ...
Normalizing mousewheel speed across browsers
...he values. It has two flaws on OS X: Firefox on OS X will produce values 1/3 what they should be, and Chrome on OS X will produce values 1/40 what they should be.
// Returns +1 for a single wheel roll 'up', -1 for a single roll 'down'
var wheelDistance = function(evt){
if (!evt) evt = event;
va...
Counting the number of True Booleans in a Python List
... is equal to 1.
>>> sum([True, True, False, False, False, True])
3
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What does |= (ior) do in Python?
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53
|= performs an in-place+ operation between pairs of objects. In particular, between:
sets: a u...
What do (lambda) function closures capture?
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163
Your second question has been answered, but as for your first:
what does the closure capture...
Print a list in reverse order with range()?
...parameters. 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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Which is faster in Python: x**.5 or math.sqrt(x)?
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93
math.sqrt(x) is significantly faster than x**0.5.
import math
N = 1000000
%%timeit
for i in r...
Floating point vs integer calculations on modern hardware
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35
Alas, I can only give you an "it depends" answer...
From my experience, there are many, many v...