Comments (5)
After reading this, I kind of get why CS doesn’t have let
, but my question is more about solving a practical issue rather than syntax.
If, for example, I loop through all the properties of an object and want to create something for each property (say, a watcher), I need to be able to refer to that thing that this something was created for. And currently I don’t really see how this is achievable with CS.
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Found out that I can do it with [].forEach
:
Weird, but I’ll try to get used to it...
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Still keeping it open to get an expert answer on whether my solution is the “ideologically correct” one.
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The standard CoffeeScript solution is:
for key in keys
do (key) =>
funcs[key] = => key
I think it'd be great to add the shorthand for let key in keys
for this common case, though.
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Yes, do
is the idiomatic way to create a new scope (like you’re wishing you could have the for
loop do, which it does for let
/const
variables). And since [].forEach
takes a callback function, within that callback is a new function scope just like do
creates, so that’s also a fine solution and perhaps simpler to understand.
Closing as there has been lots of discussion of let
/const
elsewhere and I don’t see it getting revisited anytime soon. If we design a way to “opt in” to block-scoped variables, a proposal to do so should get its own thread and also not cause any breaking changes.
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