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Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
...ernel
def require_relative(path)
require File.join(File.dirname(caller[0]), path.to_str)
end
end
end
This allows you to use require_relative as you would in ruby 1.9.2 in ruby 1.8 and 1.9.1.
share
...
Usages of Null / Nothing / Unit in Scala
... b: Boolean =
if (1 > 2) false
else throw new RuntimeException("error")
the else clause is of type Nothing, which is a subclass of Boolean (as well as any other AnyVal). Thus, the whole assignment is valid to the compiler, although the else clause does not really return anything.
...
Calculate distance between two latitude-longitude points? (Haversine formula)
...n asked for distance on between points on a WGS84 globe. Not sure how much error creeps in by using a perfect sphere, but I suspect it can be quite a lot depending on where the points are on the globe, thus the distinction is worth bearing in mind.
– redcalx
No...
How to sort a dataframe by multiple column(s)
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I have "invalid argument to unary operator" error while running the second example.
– Nailgun
Jan 22 '13 at 23:01
22
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From inside of a Docker container, how do I connect to the localhost of the machine?
...as described in qoomon's answer.
2020-01: some progress has been made. If all goes well, this should land in Docker 20.04
TLDR
Use --network="host" in your docker run command, then 127.0.0.1 in your docker container will point to your docker host.
Note: This mode only works on Docker for Linux...
validation custom message for rails 3
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How do I remove the :title from the error message above? Above displays as "Title Story title is required". I want "Story title is required." Thanks.
– datauser
Oct 6 '11 at 6:37
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Recommended way to embed PDF in HTML?
... in Chrome 9 and Firefox 3.6, but in IE8 it shows the message "Insert your error message here, if the PDF cannot be displayed."
I haven't yet tested older versions of any of the above browsers, though. But here's the code I have anyway in case it helps anyone. This sets the zoom to 85%, removes s...
__lt__ instead of __cmp__
...ttributes of the new class it's decorating (the result might be microscopically faster at runtime, at equally minute cost in terms of memory).
Of course, if your class has some particularly fast way to implement (e.g.) __eq__ and __ne__, it should define them directly so the mixin's versions are no...
Do you (really) write exception safe code? [closed]
... (using std::numeric_limits<T>::max()) before doing the addition.
My error would go in the "Normal failure vs. bug" section, that is, a bug.
It doesn't invalidate the reasoning, and it does not mean the exception-safe code is useless because impossible to attain.
You can't protect yourself aga...
Using str_replace so that it only acts on the first match?
...
I like this approach, but the code has an error, the last parameter of substr_replace call should be strlen($needle) instead of strlen($replace).. please beware about that!!
– Nelson
Sep 21 '10 at 11:47
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