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Calling filter returns [duplicate]
...ten) want to do the filtering in a lazy sense -- You don't need to consume all of the memory to create a list up front, as long as the iterator returns the same thing a list would during iteration.
If you're familiar with list comprehensions and generator expressions, the above filter is now (alm...
Printing 1 to 1000 without loop or conditionals
...plate<int N>
struct NumberGeneration{
static void out(std::ostream& os)
{
NumberGeneration<N-1>::out(os);
os << N << std::endl;
}
};
template<>
struct NumberGeneration<1>{
static void out(std::ostream& os)
{
os << 1 << std...
Get value of dynamically chosen class constant in PHP
...
$id = constant("ThingIDs::$thing");
http://php.net/manual/en/function.constant.php
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Cannot pass null argument when using type hinting
...
PHP 7.1 or newer (released 2nd December 2016)
You can explicitly declare a variable to be null with this syntax
function foo(?Type $t) {
}
this will result in
$this->foo(new Type()); // ok
$this->foo(null); // ok
$...
Rails: How to change the text on the submit button in a Rails Form
...
If you want to change all create and update form submit tags, this change is easy to make. Modify config/locales/en.yml like so:
en:
helpers:
submit:
create: "Crear un %{model}"
update: "Confirmar cambios al %{model} creado"
...
Auto-center map with multiple markers in Google Maps API v3
...think you have to calculate latitudine min and longitude min:
Here is an Example with the function to use to center your point:
//Example values of min & max latlng values
var lat_min = 1.3049337;
var lat_max = 1.3053515;
var lng_min = 103.2103116;
var lng_max = 103.8400188;
map.setCenter(new ...
Invalid date format specification in gemspec
...o update rubygems to 1.8.15 by issuing:
sudo gem install rubygems-update && update_rubygems
Everything worked after that, good luck! :)
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How can I get Eclipse to show .* files?
... is correct
@ If you're using Eclipse PDT, this is done by opening up the PHP explorer view
I just spent about half an hour looking for the little arrow, until I actually looked up what the 'PHP Explorer' view is. Here is a screenshot:
...
What __init__ and self do on Python?
...to declare it explicitly. When you create an instance of the A class and call its methods, it will be passed automatically, as in ...
a = A() # We do not pass any argument to the __init__ method
a.method_a('Sailor!') # We only pass a single argument
The __init__ method is roughly w...
How do I bind to list of checkbox values with AngularJS?
.... Meaning posting it to the action handler (some server side script). With php, a form element with a name like that (using the square brackets) creates an array in the request data. This way you could easily handle the selected fruits.
– Yoshi
Dec 25 '15 at 14...