go-tour

Go-Tour

The exercises from my Go Language Tour after I first took it in beginning of August, 2014 and then kept refreshing my knowledge whenever necessary.

Most important about Go language

This is a summary of the most important points to consider with Go language when taking the tour and afterwards when using the language.

• programs are made of packages, programs start running in package main (see Packages);
• a name is exported from a package and can be refereed to only if it begins with a capital letter (see Exported names);
• functions could return multiple results, including named return values (see Multiple results, Named return values);
• variables without initializers are given zero values (see Zero values);
• type conversions are always explicit (see Type conversions);
• there is only one looping construct - for (see For, For is Go's "while");
• switch statement has implicit break after each case (see Switch);
• defer statement for deferring the execution of a function until the surrounding function returns (see Defer);
• there are pointers, but no pointer arithmetic (see Pointers);
• slices are "dynamically-sized, flexible views into the elements of an array" (see Slices);
• functions are values and may be closures as well (see Function values, Function closures);
• no classes, but methods on types, which are functions with a special receiver argument (see Methods);
• interface type is defined as a set of method signatures and a value of such type can hold any value that implements those methods (see Interfaces);
• error state is expressed with error values (see Errors);
• type parameters and generic types are the way Go implements generics since version 1.18 (see Type parameters, Generic types);
• goroutines are a lightweight threads managed by the Go runtime (see Goroutines), which communicate and synchronize through channels (see Channels) as sends and receives on channels block until the other side is ready;

Usage

To build the exercises do the following:

1. Clone the repository (e.g. in your home directory):

git clone --recurse-submodules https://github.com/gdsotirov/go-tour.git
cd go-tour

1. Build all exercises:

make --jobs

1. Run exercises (e.g. ex_mtp_23_wc):

./ex_mtp_23_wc