This is like Python's dict.setdefault. I don't love the name, but
the consistency is nice.
We have lots of places where we do things like:
if (! dict.has('foo')) {
dict.set('foo', []);
}
var arr = dict.get('foo');
arr.push(3);
We can now write:
var arr = dict.setdefault('foo', []);
arr.push(3);
(imported from commit b8933809c69ba47ec346ed51d53966793403e56c)
keys() and other methods that implicitly return keys return the
casing used for the most recent set()
(imported from commit 47cac13c2b928fd19b07c44fd1504426fb36e3d8)
This means that we no longer need to unmunge keys at the expense of
having to store the original key.
(imported from commit 958c33c806b8b399e9a9290e4f14ef119d923c14)
Dict.each() allows to iterate through values and keys of a Dict.
The callback function is passed value as the first parameter to
be similar to _.each()'s calling sequence.
(imported from commit e745e8b5d2f167b8b8acf7542b767494e354b037)
There are also one or two places we don't need to use it for security
purposes, but we do so for consistencey.
(imported from commit aa111f5a22a0e8597ec3cf8504adae66d5fb6768)
Zev Benjamin
Steve Howell