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How to efficiently compare two unordered lists (not sets) in Python?
...,000 ints with 5 repeats, Counter is 4x faster. python3.6 -m timeit -s 'from collections import Counter' -s 'from random import shuffle' -s 't=list(range(100)) * 5' -s 'shuffle(t)' -s 'u=t[:]' -s 'shuffle(u)' 'Counter(t)==Counter(u)'
– Raymond Hettinger
Oct ...
Can “using” with more than one resource cause a resource leak?
C# lets me do the following (example from MSDN):
5 Answers
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Convert String to Float in Swift
I'm trying to convert numbers taken from a UITextField, which I presume, are actually Strings, and convert them to Float, so I can multiply them.
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Resize fields in Django Admin
... ModelAdmin.formfield_overrides.
It is quite easy - in admin.py, define:
from django.forms import TextInput, Textarea
from django.db import models
class YourModelAdmin(admin.ModelAdmin):
formfield_overrides = {
models.CharField: {'widget': TextInput(attrs={'size':'20'})},
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Programmatically get height of navigation bar
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for me, view.window is nil. So i've to take frame from UIApplication.shared.windows's keywnidow. (iOS 14)
– Lal Krishna
Sep 17 at 9:57
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What are the rules for evaluation order in Java?
...Greenie: Eric's answer is true, but as I stated you cannot take an insight from one language in this area and apply it to another without being careful. So I cited the definitive source.
– Donal Fellows
Aug 16 '11 at 18:53
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The difference between the Runnable and Callable interfaces in Java
...concise than using Callable<Void> and returning a dummy (null) value from the call() method.
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gitignore does not ignore folder
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This will completely remove the folder from the (current version of the) repo. OP wants the folder to be there, but new changes should not be tracked
– Gareth
Jun 25 '14 at 13:39
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How do I convert an existing callback API to promises?
...ctions should never throw, they should return rejections instead. Throwing from a promise returning function will force you to use both a } catch { and a .catch. People using promisified APIs do not expect promises to throw. If you're not sure how async APIs work in JS - please see this answer first...
How to extract custom header value in Web API message handler?
...cally supplies a default guid as a string (as it would have been retrieved from Header) and the Guid.Parse third parameter will translate the found or default string value into a GUID.
– Mikee
Feb 6 '15 at 14:23
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