JavaScript reallocates an Array when a value is assigned to an element that is outside the contains a value that matches a certain key value
Use “ “ when key has number or other special characters Can assign variables any value – including arrays, objects, functions ◦ var myName = “Mark”;
provide a key and a value, and then you use the key to fetch the value When you want to tear a chunk out of a JavaScript array, you turn to the
Associative array abstraction Associate one value with each key public class ST
26 fév 2020 · boolean contains(Key key) is there a value paired with key? Iterable keys() all the keys in the symbol table void delete(Key key)
map contains info about pointers to constructors and prototypes v8 hash tables are large arrays containing keys and values
Thus the first element has index 0, the second element has index 1, and so on Fortunately, JavaScript gives us a way to simply ask the array itself,
JavaScript Object Notation (JSON) has become the de facto standard for RESTful The Core JSON data format includes JSON Data and Value Types