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Introduction Typically, computer languages have fallen into two camps: Statically-typed languages. Dynamically-typed languages. Statically-typed Languages These languages have specific variable types and the developer compiles the code using an ‘ahead-of-time’ compiler. The compiler type checking is performed before the code is run.  This is an excellent way to develop software as the compiler performs static-analysis of the code as part of the compilation, alerting the developer when issues arise. Software typically takes longer to develop in this method, but the software developed in this manner typically works better in complex scenarios. Dynamically-typed Languages These languages don’t have specific variable types...

Interchangeable Most of the Time You can define untyped variables by declaring them using the ‘var’ or ‘dynamic’ keywords. The ‘var’ keyword declares a variable without specifying its type, leaving the variable as a dynamic. No type is specified. The ‘dynamic’ keyword declares a variable of the type ‘dynamic’ with optional typing. It marks variable as 'not type checked'. Exception (Methods) Methods need to return a type so they will work with 'dynamic' but  wont work with 'var': void main() {   print (multiplyMethod1(2,4));   print (multiplyMethod2(2,4)); }   dynamic multiplyMethod1(int a, int b){   return a * b; }  ...

As mentioned at the start of this book, a Mixin is a class that contains methods for use by other classes without it having to be the parent class of those other classes.

So, a Mixin is a class you can use code from without having to inherit from...

In Dart, you compare equality using the ‘==’ operator rather than an ‘equals’ method. Sometimes you need to override it this operator in your class to ensure that instances of the classes are compared correctly....