JavaScript Data Sets: Index Arrays, Objects, and Constructors
JavaScript data sets include index arrays and objects. Object constructors are used to define a new instance of an object.
#JavaScript
Most programming languages have data types, such as arrays and objects, that are designed to hold sets of data. JavaScript is no different! In this lesson we will learn about JavaScript index arrays and objects.
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Battle Card JavaScript Tutorial (arrays, objects, object constructors):
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If you do not specify the names of your keys, they will automatically be indexed using numbers. The first value in the set with have an index of 0.
Say we have an array that stores metal bands. Out of that set, we want to access "Slipknot". To access "Slipknot", we can reference it's key.
Another variable that stores sets of data is called an object. An object's keys are often refered to as "properties".
A constructor is used to define a certain type of object and usually starts with a capital letter.
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