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sys.argv[1] meaning in script
...
> python print_args.py
['print_args.py'] 1
> python print_args.py foo and bar
['print_args.py', 'foo', 'and', 'bar'] 4
> python print_args.py "foo and bar"
['print_args.py', 'foo and bar'] 2
> python print_args.py "foo and bar" and baz
['print_args.py', 'foo and bar', 'and', 'baz'] ...
Remove substring from the string
...
You can use the slice method:
a = "foobar"
a.slice! "foo"
=> "foo"
a
=> "bar"
there is a non '!' version as well. More info can be seen in the documentation about other versions as well:
http://www.ruby-doc.org/core/classes/String.html#method-i-slice-2...
How to create an array for JSON using PHP?
...d_array = array(
"nome_array" => array(
array(
"foo" => "bar"
),
array(
"foo" => "baz"
)
)
);
echo json_encode($named_array);
share
|
...
Can I invoke an instance method on a Ruby module without including it?
... call it off of Mods as if it had been declared as
module Mods
def self.foo
puts "Mods.foo(self)"
end
end
The module_function approach below will avoid breaking any classes which include all of Mods.
module Mods
def foo
puts "Mods.foo"
end
end
class Includer
include Mods
end
...
Is it possible to print a variable's type in standard C++?
... return r;
}
The Results
With this solution I can do this:
int& foo_lref();
int&& foo_rref();
int foo_value();
int
main()
{
int i = 0;
const int ci = 0;
std::cout << "decltype(i) is " << type_name<decltype(i)>() << '\n';
std::cout << ...
How do I remove the file suffix and path portion from a path string in Bash?
Given a string file path such as /foo/fizzbuzz.bar , how would I use bash to extract just the fizzbuzz portion of said string?
...
Mocking python function based on input arguments
..."
elif args[0] == 43:
return "Called with 43"
elif kwargs['foo'] == 7:
return "Foo is seven"
mockobj.mockmethod.side_effect = my_side_effect
That does the trick
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|
im...
When is null or undefined used in JavaScript? [duplicate]
...various scenarios:
You declare a variable with var but never set it.
var foo;
alert(foo); //undefined.
You attempt to access a property on an object you've never set.
var foo = {};
alert(foo.bar); //undefined
You attempt to access an argument that was never provided.
function myFunction (fo...
Is pass-by-value a reasonable default in C++11?
...let the compiler do the copying.
In code this means don't do this:
void foo(T const& t)
{
auto copy = t;
// ...
}
but do this:
void foo(T t)
{
// ...
}
which has the advantage that the caller can use foo like so:
T lval;
foo(lval); // copy from lvalue
foo(T {}); // (potentia...
Differences between Perl and PHP [closed]
...perators return their arguments, while they return booleans in PHP. Try:
$foo = '' || 'bar';
in each language. In Perl, you can even do $foo ||= 'default' to set $foo to a value if it's not already set. The shortest way of doing this in PHP is $foo = isset($foo) ? $foo : 'default'; (Update, in PH...