Creating the Objects

Question

I feel like this skipped over some information. In the previous videos we were creating objects by declaring them like variables:
'''
const students = {
     name: 'Jesse', 
     grades: [80, 85, 90, 95]
}
'''
But now in this video Guil just changes the nested arrays into objects with basically a simple switch of the brackets to curly.. but no mention of the inner workings behind this or that this is how the object is created.
Are the curly braces what creates the object?

minah · Accepted Answer

Hi Austin, 
There are different ways to create new objects:
1. Define and create a single object, using an object literal.
2. Define and create a single object, with the keyword new.
3. Define an object constructor, and then create objects of the constructed type.
Object literal is the easiest way to create a JavaScript Object.
Using an object literal, you both define and create an object in one statement.
And yes an object literal is a list of name:value pairs (like age:50) inside curly braces {}.
Happy coding ☺️

Lukas Schmid · Answer

Hi Austin, 
in this video, he creates an array of objects instead of an array of arrays (multidimensional array)  
An array of objects is easier to read and understand because in objects you have the properties whichs says what it is, and a value.  
So in the video you know what exactly is the question, and what is the answer and you can access the values by the property name.   
All these objects are stored in an array because you can loop through this objects easily with e.g. a "for-loop".  
With an array of arrays, you can only access these values by the index number and it is not clear, what stands for what and since these are arrays in an array, you have to use to index numbers.   
E.g.:  
array of arrays:  
questions[0][0] = "How many planets are in the Solar System?"  
questions[2][1] = 6  
array of objects  
questions[0].question = "How many planets are in the Solar System?"  
questions[0].answer = 8  
questions[1].question = "How many continents are there?"  
questions[1].answer = 7  
etc...  
So it's a way more easier to understand and read the code and work with it.   
Hope this answer helps :)

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Austin Schneider

Austin Schneider

Creating the Objects

2 Answers

minah

minah

Lukas Schmid

Lukas Schmid