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Difference between len() and .__len__()?
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Sadly, this another example of the lack of a common base class for objects in Python. Syntactic context switching has always been nutty. In some cases it is common idiom to use an underscore method, in others one should use something like a function to do something common to m...
Is ServiceLocator an anti-pattern?
...o be DI ready. So if you want to start introducing DI to an existing code base it is often the case that you will change things to become DI services slowly, and the code that references these services will often NOT be DI services. Hence THOSE services will need to use the Service Locator in orde...
How many and which are the uses of “const” in C++?
...ry to reference-to-const, to lengthen its lifetime. The reference can be a base - and the destructor of it doesn't need to be virtual - the right destructor is still called:
ScopeGuard const& guard = MakeGuard(&cleanUpFunction);
Explanation, using code:
struct ScopeGuard {
~ScopeGua...
What kind of Garbage Collection does Go use?
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non-compacting
mostly precise (except stack frames)
stop-the-world
bitmap-based representation
zero-cost when the program is not allocating memory (that is: shuffling pointers around is as fast as in C, although in practice this runs somewhat slower than C because the Go compiler is not as advanced...
Is using Random and OrderBy a good shuffle algorithm?
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This is based on Jon Skeet's answer.
In that answer, the array is shuffled, then returned using yield. The net result is that the array is kept in memory for the duration of foreach, as well as objects necessary for iteration, and y...
What do pty and tty mean?
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Can someone help on when and how *nix based operating system creates this pseudo terminals.
– Krishna Oza
Feb 7 '17 at 6:37
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What are “Groovy” and “Grails” and what kinds of applications are built using them?
...Grails (previously known as "Groovy on Grails") is a programming framework based on Groovy and inspired by Ruby on Rails (there are differences, but there are lots of similarities too). Like RoR, Grails promotes "coding by convention", development best practices, and is meant to be highly productive...
Common MySQL fields and their appropriate data types
I am setting up a very small MySQL database that stores, first name, last name, email and phone number and am struggling to find the 'perfect' datatype for each field. I know there is no such thing as a perfect answer, but there must be some sort of common convention for commonly used fields such as...
In Matlab, when is it optimal to use bsxfun?
...prove the performance.
bsxfun allows you to do just that: create a matrix based on applying an arbitrary operator to all pairs of elements of two vectors, instead of operating explicitly on two matrices obtained by replicating the vectors. That is singleton expansion. You can also think about it as...
Do I encode ampersands in ?
...C 3987 (IRIs, Internationalized Resource Identifiers), on which the WhatWG based its work to define how browsers should behave when they see an URL with non-ASCII characters in it since HTML5. It's therefore now safe to include non-ASCII characters in URLs, percent-encoded or not.
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