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How to Test a Concern in Rails
...test your concerns against the actual classes that use them (e.g., models) and you'll be able to test them everywhere they're used. And you only have to write the tests once and then just include them in any model spec that uses your concern. In your case, this might look something like this:
# app...
Reserved keywords in JavaScript
...ere is my poem, which includes all of the reserved keywords in JavaScript, and is dedicated to those who remain honest in the moment, and not just try to score:
Let this long package float,
Goto private class if short.
While protected with debugger case,
Continue volatile interface.
Instanceof s...
PostgreSQL - how to quickly drop a user with existing privileges
I'm trying to make restricted DB users for the app I'm working on, and I want to drop the Postgres database user I'm using for experimenting. Is there any way to drop the user without having to revoke all his rights manually first, or revoke all the grants a user has?
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How to align content of a div to the bottom
Say I have the following CSS and HTML code:
26 Answers
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List files recursively in Linux CLI with path relative to the current directory
... answered Oct 29 '08 at 3:34
Andru LuvisiAndru Luvisi
21.4k66 gold badges4747 silver badges6161 bronze badges
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How do I include negative decimal numbers in this regular expression?
...\d*(\.\d+)?$
I verified it in Rubular with these values:
10.00
-10.00
and both matched as expected.
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Remove rows with all or some NAs (missing values) in data.frame
... 1 2 3 2
but using complete.cases is quite a lot more clear, and faster.
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AttributeError: 'module' object has no attribute
...it, but in fact the import work only gets done the first time. The second and subsequent times you import a module, it's a quick operation.)
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How do I preserve line breaks when using jsoup to convert html to plain text?
...nt.OutputSettings().prettyPrint(false));//makes html() preserve linebreaks and spacing
document.select("br").append("\\n");
document.select("p").prepend("\\n\\n");
String s = document.html().replaceAll("\\\\n", "\n");
return Jsoup.clean(s, "", Whitelist.none(), new Document.OutputSet...
A weighted version of random.choice
I needed to write a weighted version of random.choice (each element in the list has a different probability for being selected). This is what I came up with:
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