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Overload with different return type in Java?
...ficient for the compiler to figure out which function to call:
public int foo() {...}
public float foo() {..}
...
foo(); // which one?
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In Python, using argparse, allow only positive integers
... return ivalue
parser = argparse.ArgumentParser(...)
parser.add_argument('foo', type=check_positive)
This is basically just an adapted example from the perfect_square function in the docs on argparse.
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JavaScript closures vs. anonymous functions
....
Consider the following example;
function f()
{//begin of scope f
var foo='hello'; //foo is declared in scope f
for(var i=0;i<2;i++){//i is declared in scope f
//the for loop is not a function, therefore we are still in scope f
var bar = 'Am I accessible?';//bar is declared in sc...
Sass and combined child selector
... combined child selector you would probably do something similar to this:
foo {
bar {
baz {
color: red;
}
}
}
If you want to reproduce the same syntax with >, you could to this:
foo {
> bar {
> baz {
color: red;
}
}
}
This compiles to this:
foo >...
Can virtual functions have default parameters?
...er values are based on the static type.
Given
class A {
virtual void foo(int i = 1) { cout << "A::foo" << i << endl; }
};
class B: public A {
virtual void foo(int i = 2) { cout << "B::foo" << i << endl; }
};
void test() {
A a;
B b;
A* ap = &b;
a.foo(...
Any reason not to use '+' to concatenate two strings?
...ires an argument, and you write it expecting to get a string:
In [1]: def foo(zeta):
...: print 'bar: ' + zeta
In [2]: foo('bang')
bar: bang
So, this function may be used pretty often throughout the code. Your coworkers may know exactly what it does, but not necessarily be fully up-to-sp...
To underscore or to not to underscore, that is the question
...rk languages? For example since C# is case-sensitive you can call a field "foo" and the public property "Foo" and it works fine.
...
getenv() vs. $_ENV in PHP
...
Does not explain why $_ENV("FOO") and getenv("FOO") return different results.
– rich remer
Aug 10 '16 at 23:17
...
How to debug Ruby scripts [closed]
...ion path of your code while calling .inspect on the method or object (e.g. foo):
raise foo.inspect
In the above code, raise triggers an Exception that halts execution of your code, and returns an error message that conveniently contains .inspect information about the object/method (i.e. foo) on t...
Is there a simple, elegant way to define singletons? [duplicate]
...en have to use the Instance method. Here's an example:
@Singleton
class Foo:
def __init__(self):
print 'Foo created'
f = Foo() # Error, this isn't how you get the instance of a singleton
f = Foo.instance() # Good. Being explicit is in line with the Python Zen
g = Foo.instance() # Retu...