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Cost of exception handlers in Python
...e just tried the following:
import timeit
statements=["""\
try:
b = 10/a
except ZeroDivisionError:
pass""",
"""\
if a:
b = 10/a""",
"b = 10/a"]
for a in (1,0):
for s in statements:
t = timeit.Timer(stmt=s, setup='a={}'.format(a))
print("a = {}\n{}".format(a,s))
...
What do the numbers in a version typically represent (i.e. v1.9.0.1)?
...
200
In version 1.9.0.1:
1: Major revision (new UI, lots of new features, conceptual change, etc.)...
Selecting a row of pandas series/dataframe by integer index
...
echoing @HYRY, see the new docs in 0.11
http://pandas.pydata.org/pandas-docs/stable/indexing.html
Here we have new operators, .iloc to explicity support only integer indexing, and .loc to explicity support only label indexing
e.g. imagine this scenario
In ...
What's the use of do while(0) when we define a macro? [duplicate]
...
140
You can follow it with a semicolon and make it look and act more like a function.
It also works ...
How do I convert a float number to a whole number in JavaScript?
... 5 5
~~value // 5 5 5
value | 0 // 5 5 5
value >> 0 // 5 5 5
value >>> 0 // 5 5 5
value - value % 1 // 5 5 5
Negative
// val...
How to list the size of each file and directory and sort by descending size in Bash?
...
answered Feb 7 '13 at 10:54
DeveloperDeveloper
20.6k1919 gold badges7272 silver badges114114 bronze badges
...
Validate phone number with JavaScript
...alidates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
26 Answers
...
What is the smallest possible valid PDF?
...ting problem. Taking it by the book, you can start off with this:
%PDF-1.0
1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj 2 0 obj<</Type/Pages/Kids[3 0 R]/Count 1>>endobj 3 0 obj<</Type/Page/MediaBox[0 0 3 3]>>endobj
xref
0 4
0000000000 65535 f
0000000010 00000 n
00...
Get program execution time in the shell
...
10 Answers
10
Active
...
Knight's Shortest Path on Chessboard
...ves are connected (value=1), and unavailable moves are disconnected (value=0), the sparse matrix would be like:
(a1,b3)=1,
(a1,c2)=1,
.....
And the shortest path of two points in a graph can be found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
func...