Nim · Easy

Lesson 1 · On the house

ref objects and inheritance

Heap objects with ref, nil, inheritance with of RootObj, and dynamic dispatch with method.

Lesson 2

Generics

Generic procs and types with [T], constraints with typeclasses, and explicit instantiation.

Lesson 3

Tables

Hash maps with std/tables: Table, toTable, getOrDefault, mgetOrPut, and CountTable.

Lesson 4

sequtils and functional style

map, filter, foldl, mapIt, filterIt, anyIt, zip, and toSeq.

Lesson 5

Option and Result-style returns

std/options for missing values, some/none, get, isSome, map, and returning errors.

Lesson 6

Modules and visibility

import, from/import, export markers *, include vs import, and nimble packages.

Lesson 7

Operators and UFCS

Define operators as procs, `$` for printing, `==` for equality, and method-call chaining.

Lesson 8

Distinct types

Type-safe wrappers with distinct, borrow pragmas, and preventing unit mix-ups.

Lesson 9

Files and the OS

readFile, writeFile, lines iterator, File handles, paths, and command-line arguments.

Lesson 10

Iterators

Inline and closure iterators, yield, items/pairs, and writing iterators for your types.