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A comment on Elm at Prezi. Parent comment

Re:Elm at Prezi by eliben on Wednesday May 29, 2013 @03:55PM (#5788685)
Do source maps also support tracing values in variables, or do they only map line numbers in source to line numbers in output? Because the former (mapping values) is the hard part of implementing a debugger.
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Re:Elm at Prezi by rbanffy on Wednesday May 29, 2013 @11:20PM (#5790701)
I don't think tracing values is very important when they're immutable.
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Re:Elm at Prezi by eliben on Friday June 07, 2013 @04:32PM (#5841588)
How are they immutable? Given some obj, is obj.prop immutable?
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