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Ruby class instance variable vs. class variable
...so subclasses can change the value of the class instance variable, and the base class will also be affected by the change, which is usually undesirable behavior:
class C
@@c = 'c'
def self.c_val
@@c
end
end
C.c_val
=> "c"
class D < C
end
D.instance_eval do
def change_c_val
...
What is the fundamental difference between WebSockets and pure TCP?
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Xcode 4 - detach the console/log window
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Getting vertical gridlines to appear in line plot in matplotlib
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Which is better: … or …
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How can I count the number of matches for a regex?
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What is non-blocking or asynchronous I/O in Node.js?
...P handle IO or network requests. If your code reads from a file or the database, your code "blocks" everything after it from executing. In that period, your machine is holding onto memory and processing time for a thread that isn't doing anything.
In order to cater other requests while that thread...
What is the advantage of using async with MVC5?
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Difference between using Throwable and Exception in a try catch
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What happens if a Android Service is started multiple times?
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