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Ruby: extend self
...ways helps to think of extend as include inside the singleton class (also known as meta or eigen class).
You probably know that methods defined inside the singleton class are basically class methods:
module A
class << self
def x
puts 'x'
end
end
end
A.x #=> 'x'
Now th...
kernel stack and user space stack
...tware RAID code being interrupted by network code with iptables active is known to trigger such in untuned older kernels ... solution is to increase kernel stack sizes for such workloads).
Does each process have its own kernel stack ?
Not just each process - each thread has its own kerne...
How to delete an old/unused Data Model Version in Xcode
...al 8". For me it appeared on two separate lines. I removed these lines and now it's completely removed from Xcode.
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Override compile flags for single files
...t that allows me to have one exception: foo.cpp (that one file uses Qt for now but long term I want to remove that dependency and I want to make sure not Qt creeps in anywhere else).
find_package(Qt5Core REQUIRED)
set(QT_INCLUDE_PROPERTIES "")
foreach(DIR ${Qt5Core_INCLUDE_DIRS})
set(QT_INCLUDE...
When is a language considered a scripting language? [closed]
...finition of what "functional programming" is, is pretty clear, but nobody knows what a "functional programming language" is.
Functional programming or object-oriented programming are programming styles; you can write in a functional style or an object-oriented style in pretty much any language. For...
application/x-www-form-urlencoded or multipart/form-data?
...
READ AT LEAST THE FIRST PARA HERE!
I know this is 3 years too late, but Matt's (accepted) answer is incomplete and will eventually get you into trouble. The key here is that, if you choose to use multipart/form-data, the boundary must not appear in the file data ...
What happens to a github student account's repositories at the end of 2 years?
...ed to either provide billing details to continue on pro subscription which now costs USD $4/mo (vs $7/mo previously) or downgrade to a free account.
Downgrading to the free account would still let me keep and access all my private repos (with less number of collaborators allowed I think) while losin...
Selector on background color of TextView
...ll help someone even if the OP probably has, I hope, solved his problem by now.
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What's the role of GetHashCode in the IEqualityComparer in .NET?
...r.GetHashCode methods are used instead of the methods on the Key objects.
Now to explain why both methods are necessary, consider this example:
BoxEqualityComparer boxEqC = new BoxEqualityComparer();
Dictionary<Box, String> boxes = new Dictionary<Box, string>(boxEqC);
Box redBox = ...
Difference between this and self in JavaScript
...e inner function is not called until invoked by yourObject. So this.foo is now yourObject.foo but self still resolves to the variable in the enclosing scope which, at the time the inner function object was returned, was (and in the resulting closure still is) myObject. So, within the inner function,...