attrOrDefault method

[SuprDewd]

A little helper method for returning a default value if the specified attribute isn't set.

For example, if we have a slider:

And we would like to get the min, max and step attributes,
and provide default values for them if they aren't set,
we would do something like the following:
var slider = $('#slider'),
min = slider.attr('min'),
max = slider.attr('max'),
step = slider.attr('step');

if (min === undefined) min = 0;
if (max === undefined) max = 100;
if (step === undefined) step = 1;

But with the attrOrDefault method, we can do the following:
var slider = $('#slider'),
min = slider.attr('min', 0),
max = slider.attr('max', 100),
step = slider.attr('step', 1);

Unit tests are also included.

[SuprDewd]

We can also do:

var slider = $('#slider'),
    min = slider.attr('min') || 0,
    max = slider.attr('max') || 100,
    step = slider.attr('step') || 1;

Which makes this commit useless...