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How to use enums as flags in C++?
...expression HasClaws | CanFly? This is not what enums are for. Use integers and constants.
– Lightness Races in Orbit
Mar 27 '15 at 17:49
27
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OAuth: how to test with local URLs?
...ake sure that www.publicdomain.com points to 127.0.0.1 in your hosts file, AND that twitter can do a successful DNS lookup on www.publicdomain.com, i.e the domain needs to exist and the specific callback should probably return a 200 status message if requested.
EDIT:
I just read the following articl...
What does “Changes not staged for commit” mean
...made since the last commit. For example, let's say you have file a, file b and file c. You modify file a and file b but the changes are very different in nature and you don't want all of them to be in one single commit. You issue
git add a
git commit a -m "bugfix, in a"
git add b
git commit b -m "n...
Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
What is the best practice if I want to require a relative file in Ruby and I want it to work in both 1.8.x and >=1.9.2?
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How can I easily fixup a past commit?
...r in my original question. The script assumes that you staged some changes and then applies those changes to the given commit.
NOTE: This script is Windows-specific; it looks for git.exe and sets the GIT_EDITOR environment variable using set. Adjust this as needed for other operating systems.
Usin...
How do I add more members to my ENUM-type column in MySQL?
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Most ALTER TABLE commands will completely rewrite the whole table. Is mysql clever enough to not do that with enum ?
– John
Oct 9 '18 at 22:10
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Is multiplication and division using shift operators in C actually faster?
Multiplication and division can be achieved using bit operators, for example
19 Answers
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Rounding up to next power of 2
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This thread is still well referenced but this answer (and most others) are highly outdated. CPUs have an instruction to help this (actually already at that time?). From : jameshfisher.com/2018/03/30/round-up-power-2.html uint64_t next_pow2(uint64_t x) { return x == 1 ? 1 : 1<...
How do you know when to use fold-left and when to use fold-right?
I'm aware that fold-left produces left-leaning trees and fold-right produces right-leaning trees, but when I reach for a fold, I sometimes find myself getting bogged down in headache-inducing thought trying to determine which kind of fold is appropriate. I usually end up unwinding the entire proble...
The SQL OVER() clause - when and why is it useful?
I read about that clause and I don't understand why I need it.
What does the function Over do? What does Partitioning By do?
Why can't I make a query with writing Group By SalesOrderID ?
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