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Delegates in swift?
...story to illustrate this. Read it in a Playground if you like.
Once upon a time...
// MARK: Background to the story
// A protocol is like a list of rules that need to be followed.
protocol OlderSiblingDelegate: class {
// The following command (ie, method) must be obeyed by any
// underlin...
Foreign Key naming scheme
I'm just getting started working with foreign keys for the first time and I'm wondering if there's a standard naming scheme to use for them?
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Transform DateTime into simple Date in Ruby on Rails
I have a datetime column in db that I want to transform into a simple date when I show it to users.
6 Answers
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PHP Timestamp into DateTime
Do you know how I can convert this to a strtotime, or a similar type of value to pass into the DateTime object?
4 Answer...
Temporarily disable auto_now / auto_now_add
...his situation while testing my application. I needed to "force" an expired timestamp. In my case I did the trick by using a queryset update. Like this:
# my model
class FooBar(models.Model):
title = models.CharField(max_length=255)
updated_at = models.DateTimeField(auto_now=True, auto_now_a...
Linking static libraries to other static libraries
...rary from the subset of the .o files that contain them. This is difficult, time consuming and error prone. I'm not aware of any tools to help do this (not to say they don't exist), but it would make quite an interesting project to produce one.
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Get Folder Size from Windows Command Line
...B wrong1. Furthermore it will likely count symlinks and junctions multiple times so it's at best an upper bound, not the true size (you'll have that problem with any tool, though).
An alternative is PowerShell:
Get-ChildItem -Recurse | Measure-Object -Sum Length
or shorter:
ls -r | measure -sum Len...
Check if a given key already exists in a dictionary
...
Wanted to share that (using Python 2.7) the run time of something I just wrote, basing heavily on dicts, was 363.235070 using "key in dict.keys()" and drastically went down to 0.260186 solely by removing the call for "keys()"
– Ido_f
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Moving and vanishing lines of code; trouble with Eclipse's XML Editor
Sometimes my code moves on its own or just disappears in the Eclipse XML editor.
7 Answers
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In Python how should I test if a variable is None, True or False
...tly more efficient and, cherry on the cake, more human readable.
In [1]: %timeit (1 == 1) == True
38.1 ns ± 0.116 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
In [2]: %timeit (1 == 1) is True
33.7 ns ± 0.141 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
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