Set And Map Javascript
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Set And Map Javascript
Sets are very similar to arrays, but they don't come with all the fancy built in methods that arrays have. Set() sets the value for a key in a map: .size — returns the number of values in the set.
Map.set('firstname', 'luke') map.set('lastname', 'skywalker') map.set('occupation', 'jedi knight') here we begin to see how maps have elements of both objects and arrays. Is a collection of keyed data items, just like an object. The following adds three key/value pairs to map:
The set() method is represented by the following syntax:
The following adds three key/value pairs to map: A map 's keys can be any value (including functions, objects, or any primitive). A set is a unique (data) collection of primitives and objects, and duplicates are not permitted. Map.set('firstname', 'luke') map.set('lastname', 'skywalker') map.set('occupation', 'jedi knight') here we begin to see how maps have elements of both objects and arrays.
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