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Why was the switch statement designed to need a break?
...f implementation. Some other languages supported more sophisticated cases (ranges, multiple values, strings...) at the cost, perhaps, of efficiency.
– PhiLho
Oct 31 '08 at 6:29
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How do I connect to a MySQL Database in Python?
...et
numrows = cursor.rowcount
# Get and display one row at a time
for x in range(0, numrows):
row = cursor.fetchone()
print row[0], "-->", row[1]
# Close the connection
db.close()
Reference here
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How to convert comma-delimited string to list in Python?
...haracter strings to list-
def stringtolist(x):
mylist=[]
for i in range(0,len(x),2):
mylist.append(x[i])
return mylist
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fol...
Asterisk in function call
... concept/using it.
import random
def arbitrary():
return [x for x in range(1, random.randint(3,10))]
a, b, *rest = arbitrary()
# a = 1
# b = 2
# rest = [3,4,5]
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What is the difference between `throw new Error` and `throw someObject`?
...iption
EvalError An error in the eval() function has occurred.
RangeError Out of range number value has occurred.
ReferenceError An illegal reference has occurred.
SyntaxError A syntax error within code inside the eval() function has occurred.
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What's the difference between `1L` and `1`?
...and mean!
1e9L * 4L # Ooops, overflow!
...and as @Gavin pointed out, the range for integers is roughly -2e9 to 2e9.
A caveat though is that this applies to the current R version (2.13). R might change this at some point (64-bit integers would be sweet, which could enable vectors of length > 2...
What does T&& (double ampersand) mean in C++11?
...ue_ptr. Since a unique_ptr maintains exclusive ownership of its underlying raw pointer, unique_ptr's can't be copied. That would violate their invariant of exclusive ownership. So they do not have copy constructors. But they do have move constructors:
template<class T> class unique_ptr {
//...
Algorithm to calculate the number of divisors of a given number
... even want to have to look at the prime list. You want to eliminate whole ranges of possibilities as quickly as possible! See my answer for more.
– user11318
Sep 21 '08 at 9:33
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What are all codecs and formats supported by FFmpeg?
...pported by a specific build/installation of FFmpeg. There are a very wide range of FFmpeg builds in use.
– mikerobi
Oct 5 '11 at 19:02
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How do you generate dynamic (parameterized) unit tests in python?
..."
Test that numbers between 0 and 5 are all even.
"""
for i in range(0, 6):
with self.subTest(i=i):
self.assertEqual(i % 2, 0)
The output of a test run would be:
======================================================================
FAIL: test_even (__main__.Number...