Intermediate JavaScript Development

Create array literals to store mixed data types, access items by zero-based indices, inspect length, and concatenate values to print hello world in JavaScript.

Explore arrays and the for loop structure to iterate over dynamic items, using initializer, condition, and iterator, access array elements, and print each item with console logs.

Explore accessing object properties with dot and bracket notation in JavaScript, compare arrays and objects, handle undefined, evaluate variables within bracket syntax, and print with console log keys and values.

Examine how scope works in JavaScript, from the window global scope to function scope, and how variable hiding and nested scopes affect access and reassignment across parent and child scopes.

Master the split method to break a string into an array by a delimiter, such as a space, and see how an empty string splits into characters.

Learn how to use the isArray function to determine whether a variable is an array, by comparing two variables and confirming which one is an array.

Explore the join method to combine array elements into a final string with a default comma delimiter, or use a space to produce hello world.