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A comment on Symbols in ECMAScript 6. Parent comment

Re:Symbols in ECMAScript 6 by pluma on Monday December 29, 2014 @06:39AM (#8809389)
Unique (derived) tokens that are not equal to any other value.

For example, symbols let you implement a map data structure without having to worry about shadowing built-in properties of the object.

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Re:Symbols in ECMAScript 6 by ksherlock on Monday December 29, 2014 @09:47AM (#8809949)
If you have Symbols, you also have Map and WeakMap which don't have that problem.
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