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How to get item's position in a list?
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for i in xrange(len(testlist)):
if testlist[i] == 1:
print i
xrange instead of range as requested (see comments).
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How to loop through all but the last item of a list?
...with n+1 th item in the list you could also do with
>>> for i in range(len(list[:-1])):
... print list[i]>list[i+1]
note there is no hard coding going on there. This should be ok unless you feel otherwise.
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Python: fastest way to create a list of n lists
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The probably only way which is marginally faster than
d = [[] for x in xrange(n)]
is
from itertools import repeat
d = [[] for i in repeat(None, n)]
It does not have to create a new int object in every iteration and is about 15 % faster on my machine.
Edit: Using NumPy, you can avoid the Pyt...
Why does substring slicing with index out of range work?
...st a 1-character string.
(For the exact semantics of slicing outside the range of a sequence, see mgilson's answer.)
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How important is the order of columns in indexes?
... but keep in mind an index is stored on several pages and is a tree with a range of values, while Column 1 above does negate 1/2 the possibilities, the index already knows which index page to go straight to for the Column2 value, it does not necessary need Column 1 to narrow down the set.
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Remove duplicate dict in list in Python
... if I add some or lots of duplicates). It's a log-log plot so the complete range is covered.
The absolute times:
The timings relative to the fastest approach:
The second approach from thefourtheye is fastest here. The unique_everseen approach with the key function is on the second place, howe...
Selecting the last value of a column
...iveSheet().getMaxRows();
var values = SpreadsheetApp.getActiveSheet().getRange(column + "1:" + column + lastRow).getValues();
for (; values[lastRow - 1] == "" && lastRow > 0; lastRow--) {}
return values[lastRow - 1];
}
Usage:
=lastValue("G")
EDIT:
In response to the comment a...
How to dismiss keyboard for UITextView with return key?
...Even then if you want to do this, implement the textView:shouldChangeTextInRange:replacementText: method of UITextViewDelegate and in that check if the replacement text is \n, hide the keyboard.
There might be other ways but I am not aware of any.
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Converting BigDecimal to Integer
...re 100% bet your life on it positive that the number is within the Integer range.
– Snekse
Mar 14 '15 at 20:53
1
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Generating random numbers in Objective-C
...tes. The arc4random() function returns pseudo-
random numbers in the range of 0 to (2**32)-1, and therefore has twice the range of rand(3) and
random(3).
The arc4random_stir() function reads data from /dev/urandom and uses it to permute the S-Boxes via
arc4random_addrandom().
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