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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...tionController::Parameters, which provides several methods such as require and permit.
The require method ensures that a specific parameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into requi...
How to disable zoom on Ctrl+scroll in Visual Studio 2010?
... bottom left of the text editor (to the left of the horizontal scroll bar) and also adopts the Ctrl +mouse scroll idiom for zooming in and out.
...
Clojure differences between Ref, Var, Agent, Atom, with examples
...here to use Ref, Var, Agent, Atom. I read book, but, still couldn't understand the real world examples.
5 Answers
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Is it possible to delete an object's property in PHP?
...
unset($a->new_property);
This works for array elements, variables, and object attributes.
Example:
$a = new stdClass();
$a->new_property = 'foo';
var_export($a); // -> stdClass::__set_state(array('new_property' => 'foo'))
unset($a->new_property);
var_export($a); // -> st...
Assign width to half available screen width declaratively
...s it possible to assign a widget width to half the available screen width, and do it using declarative xml?
5 Answers
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Android - Writing a custom (compound) component
The Android app I'm currently developing has a main activity that has grown quite large. This is mainly because it contains a TabWidget with 3 tabs. Each tab has quite a few components. The activity has to control of all those components at once. So I think you can imagine that this Activity has l...
How to download/checkout a project from Google Code in Windows?
...eplex.com/
I have nothing to do with this project, but I just used it now and it saved me a few minutes. Maybe it will help someone.
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Why are my basic Heroku apps taking two seconds to load?
... gets unloaded (from the server memory).
On the first hit it gets loaded and stays loaded until some time passes without anyone accessing it.
This is done to save server resources. If no one uses your app why keep resources busy and not let someone who really needs use them ?
If your app has a ...
PDO Prepared Inserts multiple rows in single query
...a.
With prepared inserts you need to know the fields you're inserting to, and the number of fields to create the ? placeholders to bind your parameters.
insert into table (fielda, fieldb, ... ) values (?,?...), (?,?...)....
That is basically how we want the insert statement to look like.
Now, t...
How to get current formatted date dd/mm/yyyy in Javascript and append it to an input [duplicate]
...0] for the current date in dd/mm/yyyy format only.
– Andrew Hill
Jun 28 '19 at 8:24
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