Arrays, Objects, & Functions Flashcards

Flashcards based on lecture notes about Arrays, Objects, and Functions in JavaScript.

Array

A data structure that allows the programmer to collect a number of related elements together in a single variable.

Array literal notation

One way to define an array in JavaScript using square brackets.

Array() constructor

One way to define an array in JavaScript using the Array() constructor.

Indexes

Used to access array elements.

push()

A method to add an item to the end of an existing array.

unshift()

A method to add an item at the beginning of an existing array.

pop()

A method to remove the last element from an array.

Spread syntax

Provides a new way to create an array from one or more existing arrays.

for…of

Iterating through an array using a simplified syntax.

Array destructuring

Provides a simplified syntax for extracting multiple scalar values from an array.

shift()

A method to remove the first element from an array.

splice()

A method used to add or remove elements from an array at any position.

forEach()

A method to iterate through the array.

map()

A method to create a new array by transforming elements of an existing array.

filter()

A method to create a new array with elements that satisfy a provided condition.

find()

A method to find the first element in an array that satisfies a provided condition.

includes()

A method to check if an array contains a specific element.

concat()

A method to combine two or more arrays.

sort()

A method to sort the elements of an array in place.

reverse()

A method to reverse the order of elements in an array in place.

Object literal notation

A way to create objects using a list of key-value pairs.

Dot notation

Accessing object properties using a dot.

Bracket notation

Accessing object properties using square brackets.

Object constructor

Creating an instance of an object using the Object constructor.

for…in loop

Used for iterating through object properties.

Destructuring

Used to extract properties from an object into distinct variables.

JSON

A language-independent data interchange format, a variant of object literal notation.

JSON.parse()

Used to turn a JSON string into an object.

Functions

Building blocks for modular code

Function declaration

A way to define a named function that can be called later in the code.

Function expression

A function assigned to a variable or property.

Arrow function

A compact alternative to a traditional function expression.

Default parameters

Parameters that have a default value if no argument is provided.

Higher-order function

A function that takes another function as an argument or returns a function.

1906

The year Cavite State University was founded.

Data structure

A collection of elements.

Array push

Adding an element to the end of the array.

Array unshift

Adding an element to the beginning of the array.

Array pop

Removing the last element of the array.

Array shift

Removing the first element of the array.

Array splice

Replacing array elements.

forEach array

Looping through each element in the array.

Array map

Creating a new array from another one.

Array filter

An array with only particular elements from the original.

Object

A data structure that holds key value pairs.

Dot notation

Access a value from an object using a dot

Add array data

Add data into an array

Call function

Calling a function

Object properties

Adding to an objects properties

Object properties

Changing an objects properties