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Java heap terminology: young, old and permanent generations?
...ng before a mention. Then in Java 8 permanent generation will get replaced by metaspace (although I'm not sure how different this will really be, other than being unbounded by default)
– Joshua McKinnon
Sep 23 '13 at 18:30
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How can I determine whether a 2D Point is within a Polygon?
...n points as before, now we need the actual sides. A side is always defined by two points.
side 1: (X1/Y1)-(X2/Y2)
side 2: (X2/Y2)-(X3/Y3)
side 3: (X3/Y3)-(X4/Y4)
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You need to test the ray against all sides. Consider the ray to be a vector and every side to be a vector. The ray has to hit each si...
Printing without newline (print 'a',) prints a space, how to remove?
...tion, which allows you to set an end parameter. You can use it in >=2.6 by importing from __future__. I'd avoid this in any serious 2.x code though, as it will be a little confusing for those who have never used 3.x. However, it should give you a taste of some of the goodness 3.x brings.
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How to rollback just one step using rake db:migrate
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Best way is running Particular migration again by using down or up(in rails 4. It's change)
rails db:migrate:up VERSION=timestamp
Now how you get the timestamp.
Go to this path
/db/migrate
Identify migration file you want to revert.pick the timestamp from that...
XML schema or DTD for logback.xml?
...oint icon after you fix it, you might need to trigger the validation again by right-clicking the file and choosing Validate.
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Why is “final” not allowed in Java 8 interface methods?
...e going to be different from interface methods, no matter what the intent, by virtue of the fact that interface methods can be multiply inherited.)
The basic idea of a default method is: it is an interface method with a default implementation, and a derived class can provide a more specific impleme...
Failed to load resource under Chrome
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I recently ran into this problem and discovered that it was caused by the "Adblock" extension (my best guess is that it's because I had the words "banner" and "ad" in the filename).
As a quick test to see if that's your problem, start Chrome in incognito mode with extensions disabled (ctrl+...
LD_LIBRARY_PATH vs LIBRARY_PATH
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LIBRARY_PATH is used by gcc before compilation to search directories containing static and shared libraries that need to be linked to your program.
LD_LIBRARY_PATH is used by your program to search directories containing shared libraries after i...
Add a duration to a moment (moment.js)
... key point in the documentation for .add()
Mutates the original moment by adding time.
You appear to be treating it as a function that returns the immutable result. Easy mistake to make. :)
If you use the return value, it is the same actual object as the one you started with. It's just ret...
Find all records which have a count of an association greater than zero
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joins uses an inner join by default so using Project.joins(:vacancies) will in effect only return projects that have an associated vacancy.
UPDATE:
As pointed out by @mackskatz in the comment, without a group clause, the code above will return dupl...