Circle implements the Shape interface

Rectangle implements the Shape interface

WITHOUT method * func circleArea(c *Circle) float64 { return math.Pi * c.r * c.r } */ WITH method

TYPES CAN CONTAIN METHODS & RETURN

Returns true if slices have a common element

TYPES CAN CONTAIN METHODS

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* Goroutines are lightweight. We can easily create thousands of them. Let's modify our program to run 1,000,000 goroutines: */

* Large programs are often made up of many smaller sub-programs. For example a web server handles requests made from web browsers and serves up HTML w

RECURSION a function which calls itself

Function factory, return the correct printer type

* the receiver is a pointer to a struct this allows us to change the data in the struct (pass by reference) it also allows us to only pass the memory

* Channels provide a way for two goroutines to communicate with one another and synchronize their execution. Here is an example program using channels

* Channels provide a way for two goroutines to communicate with one another and synchronize their execution. Let's add another sender to the program

this function is new

any func that implements the same methods as the interface will be implementing that interface

FUNCS