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Why does this C++ snippet compile (non-void function does not return a value) [duplicate]
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This is undefined behavior from the C++11 draft standard section 6.6.3 The return statement paragraph 2 which says:
[...] Flowing off the end of a function is equivalent to a return with no value; this results in undefined behavior in a value-returning function. [...]
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Getting the name of a variable as a string
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This glosses over all kinds of problems and caveats and gives the misleading impression that variable name inspection is something people can expect to "just work". For example, if you try to use varname.nameof as the retrieve_name function in the question, you get...
Spring: Why do we autowire the interface and not the implemented class?
...o use.
As long as there is only a single implementation of the interface and that implementation is annotated with @Component with Spring's component scan enabled, Spring framework can find out the (interface, implementation) pair. If component scan is not enabled, then you have to define the bean...
How do I check if a string is valid JSON in Python?
... can do something else with it. So far, I've only gotten the error message and type.
– Joey Blake
Apr 1 '11 at 12:36
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Mediator Vs Observer Object-Oriented Design Patterns
...ave been reading the Gang Of Four , in order to solve some of my problems and came across the Mediator pattern.
8 Answer...
ctypes - Beginner
...vanced python users would implement ctypes. Well i'm a beginner in python and need help.
3 Answers
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Java: when to use static methods
...ering when to use static methods? Say if I have a class with a few getters and setters, a method or two, and I want those methods only to be invokable on an instance object of the class. Does this mean I should use a static method?
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How to detect if a script is being sourced
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This seems to be portable between Bash and Korn:
[[ $_ != $0 ]] && echo "Script is being sourced" || echo "Script is a subshell"
A line similar to this or an assignment like pathname="$_" (with a later test and action) must be on the first line of the s...
How do I move an existing Git submodule within a Git repository?
...ules:
Since git 1.8.5, git mv old/submod new/submod works as expected and does all the plumbing for you. You might want to use git 1.9.3 or newer, because it includes fixes for submodule moving.
The process is similar to how you'd remove a submodule (see How do I remove a submodule?):
Edi...
How to generate a random string of a fixed length in Go?
I want a random string of characters only (uppercase or lowercase), no numbers, in Go. What is the fastest and simplest way to do this?
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