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Member Accessor Operators

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refractalize edited this page Feb 5, 2013 · 3 revisions

Normal Member Access

Normal member access is done with the dot . operator:

joe = {
    name = 'Joe'
}
joe.name == 'Joe'

Member Mapping

To map an array of objects to an array of their members, use the *. operator:

joe = {name = 'Joe'}
jenny = {name = 'Jenny'}
john = {name = 'John'}
contacts = [joe, jenny, john]
contacts*.name == ['Joe', 'John', 'Jenny']

Conditional Mapping

To return the member if the object is not nil, or otherwise to return nil, use the ?. operator:

joe = {name = 'Joe'}
nobody = nil

joe?.name == 'Joe'
nobody?.name == nil

According to the documentation, you can have Closure Compiler add the sourceMappingURL to the bottom of the script with something like this:

--output_wrapper "%output%
//# sourceMappingURL=output.js.map"

being added to your call. Not that you cannot use "\n" here, and you need a newline literal. On a Linux shell this works just fine (if you're inside of quotes when you press enter, the command doesn't get executed).

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