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How do I remove all non alphanumeric characters from a string except dash?
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@MGOwen because every time you use "" you are creating a new object due to strings being immutable. When you use string.empty you are reusing the single instance required for representing an empty string which is quicker as well as being more effi...
Is there a way to auto expand objects in Chrome Dev Tools?
EVERY SINGLE TIME I view an object in the console I am going to want to expand it, so it gets tiresome to have to click the arrow to do this EVERY SINGLE TIME :) Is there a shortcut or setting to have this done automatically?
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How to check if a string in Python is in ASCII?
...s a bytestring 'é' (Python 2 syntax, Python 3 hadn't been released at the time) and therefore .decode() is correct.
– jfs
Sep 4 '15 at 10:36
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How can I get the current date and time in the terminal and set a custom command in the terminal for
I have to check the time in a Linux terminal.
2 Answers
2
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Understanding reference counting with Cocoa and Objective-C
...stand the basic concepts.
In Cocoa, each object keeps track of how many times it is being referenced (specifically, the NSObject base class implements this). By calling retain on an object, you are telling it that you want to up its reference count by one. By calling release, you tell the objec...
Cartesian product of x and y array points into single array of 2D points
... the suggestion to use numpy.result_type.
Notable alternatives
It's sometimes faster to write contiguous blocks of memory in Fortran order. That's the basis of this alternative, cartesian_product_transpose, which has proven faster on some hardware than cartesian_product (see below). However, Paul...
What is the easiest way to get current GMT time in Unix timestamp format?
Python provides different packages ( datetime , time , calendar ) as can be seen here in order to deal with time. I made a big mistake by using the following to get current GMT time time.mktime(datetime.datetime.utcnow().timetuple())
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Reading binary file and looping over each byte
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@usr: the performance difference can be as much as 200 times for the code I've tried.
– jfs
Nov 16 '13 at 4:56
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Why is x86 ugly? Why is it considered inferior when compared to others? [closed]
...s progenitors were 8086s, after all)
x86 has evolved significantly several times, but hardware is required to maintain backwards compatibility with old binaries. For example, modern x86 hardware still contains support for running 16 bit code natively. Additionally, several memory-addressing models e...
Removing a list of characters in string
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d = {ord(c):None for c in chars}
return subj.translate(d)
import timeit, sys
def profile(f):
assert f(subj, chars_to_remove) == test
t = timeit.timeit(lambda: f(subj, chars_to_remove), number=1000)
print ('{0:.3f} {1}'.format(t, f.__name__))
print (sys.version)
PYTHON2 = sys....