🟨JavaScript higher-order functions

With functions we learned that we could pass in variable values as "parameters", but with higher-order functions we can pass in other functions!

Ever seen a computer using a computer? Essentially, a higher-order function uses one or more other (variable) functions to return a result!

In JavaScript, we can create our own higher-order functions, or use some of the many built-in for us:

🟨JavaScript forEach()

• to iterate through each element in an array

🟨JavaScript map()

• to perform an operation on each element in an array (i.e. matrix algebra)

🟨JavaScript filter()

• to eliminate elements of an array that do not meet a condition

🟨JavaScript reduce()

• to boil down a set of values into one value (e.g. finding a sum of values)

🟨JavaScript sort()

• to arrange a set of values with some defined order

🟨JavaScript every() and some()

• to find out if all or any elements in an array meet a condition