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How can I count the occurrences of a list item?
...ions import Counter;n=1000;l=[random.choice(string.ascii_letters) for x in range(n)]'
)
t2=timeit.Timer('[[x,l.count(x)] for x in set(l)]',
'import random;import string;n=1000;l=[random.choice(string.ascii_letters) for x in range(n)]'
)
print("Counte...
'Static readonly' vs. 'const'
...t, and provided that the C# compiler verifies that its value is within the range of a short (which 42 is). See Implicit constant expression conversions in the C# Language Specification. So both overloads have to be considered. The overload Equals(short) is preferred (any short is an object, but not ...
How to flatten only some dimensions of a numpy array
...
A slight generalization to Peter's answer -- you can specify a range over the original array's shape if you want to go beyond three dimensional arrays.
e.g. to flatten all but the last two dimensions:
arr = numpy.zeros((3, 4, 5, 6))
new_arr = arr.reshape(-1, *arr.shape[-2:])
new_arr.sh...
How do I use method overloading in Python?
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it's good, but it doesn't work on raw functions, just methods within a class.
– Legit Stack
Mar 1 '19 at 23:42
1
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Can I install the “app store” in an IOS simulator?
...e
The Simulator does not run ARM code, ONLY x86 code. Unless you have the raw source code from Apple, you won't see the App Store on the Simulator.
The app you write you will be able to test in the Simulator by running it directly from Xcode even if you don't have a developer account. To test your...
Why does Java's hashCode() in String use 31 as a multiplier?
...any kind of international charset with common characters outside the ASCII range. At least, I checked this for 31 and German. So I think the choice of 31 is broken.
– Hans-Peter Störr
May 11 '10 at 6:58
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Total memory used by Python process?
...MI
w = WMI('.')
result = w.query("SELECT WorkingSet FROM Win32_PerfRawData_PerfProc_Process WHERE IDProcess=%d" % os.getpid())
return int(result[0].WorkingSet)
On Linux (from python cookbook http://code.activestate.com/recipes/286222/:
import os
_proc_status = '/proc/%d/status' % os.g...
Using Git, show all commits that are in one branch, but not the other(s)
...tration https://git-scm.com/book/en/v2/Git-Tools-Revision-Selection#Commit-Ranges
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Why should I prefer to use member initialization lists?
...uch difference the member initialization list can mak. In the leetcode 303 Range Sum Query - Immutable, https://leetcode.com/problems/range-sum-query-immutable/, where you need to construct and initialize to zero a vector with certain size. Here is two different implementation and speed comparison.
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How do you set a default value for a MySQL Datetime column?
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it's important to note that datetime has a range of 1000-9999, but the range for timestamp is only 1970-2038. this can be a problem if your system has to store birthdates, or you have to handle something like the payment plan for a 30-year mortgage. dev.mysql.com/doc/...