D · Introductory

Lesson 1 · On the house

Program structure

A D source file, main, imports from Phobos, writeln, and compiling with dmd, ldc2, or gdc.

Lesson 2

Variables and types

Built-in types with fixed sizes, auto inference, default initialization, const and immutable, and casts.

Lesson 3

Decisions

if/else, the ternary operator, switch on integers and strings, case ranges, and final switch.

Lesson 4

Loops

while, do-while, for, foreach over ranges and arrays with index, labeled break and continue.

Lesson 5

Functions

Passing parameters by value, ref, out, and in, plus default arguments, overloading, UFCS, and nested functions.

Lesson 6

Arrays and slices

Static arrays, dynamic arrays, slicing, appending with ~=, length, and bounds checks.

Lesson 7

Strings

string as immutable(char)[], UTF-8, concatenation, std.string helpers, std.format, and conversions.

Lesson 8

Associative arrays

Built-in hash maps: V[K], insert, in lookups, get with default, remove, keys, values, and iteration.

Lesson 9

Structs

Value types with fields, methods, constructors, default values, static members, and toString.

Lesson 10

Enums and modules

Named enums with base types, enum properties, std.conv for names, and splitting code into modules.