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Is there a typical state machine implementation pattern?
...ended to support multiple state machines, etc. Transition actions can be accommodated as well:
typedef void transition_func_t( instance_data_t *data );
void do_initial_to_foo( instance_data_t *data );
void do_foo_to_bar( instance_data_t *data );
void do_bar_to_initial( instance_data_t *data );
voi...
Java generics type erasure: when and what happens?
...he constraints are etc. But when generics are used, they're converted into compile-time checks and execution-time casts. So this code:
List<String> list = new ArrayList<String>();
list.add("Hi");
String x = list.get(0);
is compiled into
List list = new ArrayList();
list.add("Hi");
St...
What is a 'Closure'?
...n scope when we later call the function, even if we call the function in a completely different context.
For example
Here's a really simple example in JavaScript that illustrates the point:
outer = function() {
var a = 1;
var inner = function() {
console.log(a);
}
return inner; // thi...
How do you maintain development code and production code? [closed]
...flow. The history of doing this vs Trunk-Based-Development is noted in the comments and discussions of this article by Adam Dymitruk.
(source: Gitworkflow: A Task-Oriented Primer)
Note: in that distributed workflow, you can commit whenever you want and push to a personal branch some WIP (Work ...
How to call an external command?
How do you call an external command (as if I'd typed it at the Unix shell or Windows command prompt) from within a Python script?
...
What are enums and why are they useful?
...n").
If you use enums instead of integers (or String codes), you increase compile-time checking and avoid errors from passing in invalid constants, and you document which values are legal to use.
BTW, overuse of enums might mean that your methods do too much (it's often better to have several sepa...
How do I trim leading/trailing whitespace in a standard way?
...hitespace from a string in C? I'd roll my own, but I would think this is a common problem with an equally common solution.
...
How to save/restore serializable object to/from file?
I have a list of objects and I need to save that somewhere in my computer. I have read some forums and I know that the object has to be Serializable . But it would be nice if I can get an example. For example if I have the following:
...
SQL Server insert if not exists best practice
I have a Competitions results table which holds team member's names and their ranking on one hand.
8 Answers
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Constructor function vs Factory functions
...here
return obj;
}
Of course you can make factory functions much more complicated than that simple example.
One advantage to factory functions is when the object to be returned could be of several different types depending on some parameter.
...