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polymorphic iteration

Anjali Sharma answered on January 23, 2023 Popularity 1/10 Helpfulness 1/10

answer polymorphic iteration

polymorphic iteration

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Polymorphic iterators are derivatives of bidirectional iterators and offer the same capabilities. They can traverse in forward and reverse directions and allow retrieval and storage of elements. They add the ability to traverse a collection without express knowledge of its type.

var keys1 = Object.keys(obj); // iterable
var keys2 = map.keys(); // iterator

for (var x of keys1) { ... } // can do this over and over again
for (var x of keys2) { ... } // can NEVER do this again

https://help.perforce.com/stingray/11/html/sflug/4-5.html

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