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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...
Docker can't connect to docker daemon
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I had no time to restart bash. So alias docker='sudo docker' did the trick. :p
– LovaBill
Nov 2 '16 at 9:59
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Error inflating when extending a class
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Sometimes the simplest things can be a problem :) good to know that both parameters are used for inflating.
– Warpzit
Feb 20 '12 at 12:19
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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...
map vs. hash_map in C++
... but also iterate over all the keys in the map. I saved a large amount of time in lookup, but gained it back via the iterations, so I switched back to map and am looking for other ways to improve application performance.
– Erik Garrison
Sep 6 '10 at 21:36
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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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Persist javascript variables across pages? [duplicate]
...re than that, check out @Annie's great tips in the other answer. For small time data storage, I would say Cookies are the easiest thing.
Note that cookies are stored client side.
share
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improve t...
Table overflowing outside of div
...attributes like table-row, table-cell. Tabular layouts are not floated. At time the display:table property alone is not sufficient
– questzen
Jul 18 '12 at 6:11
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When should you use constexpr capability in C++11?
...f you call max with constant values it is explicitly calculated at compile time and not at runtime.
Another good example would be a DegreesToRadians function. Everyone finds degrees easier to read than radians. While you may know that 180 degrees is 3.14159265 (Pi) in radians it is much clearer wr...
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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