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Where to define custom error types in Ruby and/or Rails?
... GemName
class AuthenticationError < StandardError; end
class InvalidUsername < AuthenticationError; end
end
an example of this would be something like this in httparty
For Ruby on Rails
Put them in your lib/ folder under a file called exceptions.rb, which would look something like t...
How persistent is localStorage?
...e) or by the app
https://developers.google.com/web-toolkit/doc/latest/DevGuideHtml5Storage
As for a "replacement for the Cookie", not entirely
Cookies and local storage really serve difference purposes. Cookies are primarily for reading server-side, LocalStorage can only be read client-side. So t...
Argparse: Required argument 'y' if 'x' is present
...t would stop you from setting --lport or --rport to 0, which might be a valid input to the program.
– borntyping
Mar 1 '18 at 14:34
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Why does PostgreSQL perform sequential scan on indexed column?
... for other DBMS as well - some optimizations as "index only scans" taken aside (but for a SELECT * it's highly unlikely such a DBMS would go for an "index only scan")
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Scaling Node.js
I'm fairly new to large-scale server-side development. I want to write a server using Node.js, but before I forge ahead I'd like to know what the general principles are for scaling node up to, say, 20 queries per second.
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git rebase fatal: Needed a single revision
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You need to provide the name of a branch (or other commit identifier), not the name of a remote to git rebase.
E.g.:
git rebase origin/master
not:
git rebase origin
Note, although origin should resolve to the the ref origin/HEAD when ...
jQuery .hasClass() vs .is()
...a comment and four upvotes to very comment. It turns out that what I had said is the correct answer. Here is the result:
http://jsperf.com/hasclass-vs-is-so
The is is multi-purpose, you can for example do is('.class'), is(':checked'), etc which means is has more to do where is hasClass is limited ...
Conda: Installing / upgrading directly from github
...tion is asking how to do it using conda directly, which the top answer provides.
– Amelio Vazquez-Reina
Jan 18 at 14:49
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How can I make a JUnit Test wait?
...aying something like Using Thread.sleep in a test is just generally a bad idea. It creates brittle tests that can fail unpredictably depending on environment ("Passes on my machine!") or load. Don't rely on timing (use mocks) or use libraries such as Awaitility for asynchroneous testing.
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Simplest way to profile a PHP script
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@Supernovah, user457015 did say PHP 5.4. He did not say it was broken on PHP 5.3.
– magnus
Oct 22 '15 at 23:24
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