docs/
└── tutorials/
└── kotlin/
├── index.mdx
├── 01-introduction/
│ ├── what-is-kotlin.mdx
│ ├── why-learn-kotlin.mdx
│ ├── kotlin-use-cases.mdx
│ ├── kotlin-vs-java.mdx
│ └── kotlin-ecosystem.mdx
├── 02-installation-and-setup/
│ ├── install-kotlin.mdx
│ ├── install-intellij-idea.mdx
│ ├── install-android-studio.mdx
│ ├── kotlin-playground.mdx
│ ├── kotlin-cli.mdx
│ ├── gradle-and-kotlin-dsl.mdx
│ └── first-kotlin-program.mdx
├── 03-kotlin-fundamentals/
│ ├── program-structure.mdx
│ ├── variables-and-mutability.mdx
│ ├── data-types.mdx
│ ├── type-inference.mdx
│ ├── operators.mdx
│ ├── comments-and-documentation.mdx
│ ├── expressions-and-statements.mdx
│ └── type-conversions.mdx
├── 04-control-flow/
│ ├── if-expressions.mdx
│ ├── when-expressions.mdx
│ ├── for-loops.mdx
│ ├── while-and-do-while.mdx
│ ├── ranges-and-progressions.mdx
│ ├── break-and-continue.mdx
│ └── labels-and-jumps.mdx
├── 05-functions/
│ ├ ── defining-functions.mdx
│ ├── parameters-and-return-types.mdx
│ ├── default-and-named-arguments.mdx
│ ├── single-expression-functions.mdx
│ ├── extension-functions.mdx
│ ├── infix-functions.mdx
│ ├── vararg-parameters.mdx
│ ├── local-functions.mdx
│ └── tail-recursion.mdx
├── 06-null-safety/
│ ├── nullable-types.mdx
│ ├── safe-call-operator.mdx
│ ├── elvis-operator.mdx
│ ├── not-null-assertion.mdx
│ ├── smart-casts.mdx
│ ├── safe-casts.mdx
│ └── null-safety-best-practices.mdx
├── 07-strings-and-collections/
│ ├── strings-and-templates.mdx
│ ├── arrays.mdx
│ ├── lists.mdx
│ ├── sets.mdx
│ ├── maps.mdx
│ ├── mutable-and-immutable-collections.mdx
│ ├── collection-operations.mdx
│ ├── sequences.mdx
│ └── collection-performance.mdx
├── 08-object-oriented-programming/
│ ├── classes-and-objects.mdx
│ ├── constructors.mdx
│ ├── properties-and-accessors.mdx
│ ├── visibility-modifiers.mdx
│ ├── inheritance.mdx
│ ├── abstract-classes.mdx
│ ├── interfaces.mdx
│ ├── data-classes.mdx
│ ├── sealed-classes-and-interfaces.mdx
│ ├── object-declarations.mdx
│ ├── companion-objects.mdx
│ ├── enum-classes.mdx
│ ├── nested-and-inner-classes.mdx
│ └── delegation.mdx
├── 09-functional-programming/
│ ├── lambda-expressions.mdx
│ ├── higher-order-functions.mdx
│ ├── function-types.mdx
│ ├── closures.mdx
│ ├── map-filter-and-reduce.mdx
│ ├── scope-functions.mdx
│ ├── inline-functions.mdx
│ └── functional-programming-patterns.mdx
├── 10-generics-and-advanced-types/
│ ├── generic-classes-and-functions.mdx
│ ├── type-constraints.mdx
│ ├── variance-in-out.mdx
│ ├── star-projections.mdx
│ ├── reified-type-parameters.mdx
│ ├── type-aliases.mdx
│ ├── value-classes.mdx
│ └── reflection-basics.mdx
├── 11-exceptions-and-error-handling/
│ ├── exceptions-overview.mdx
│ ├── try-catch-finally.mdx
│ ├── throwing-exceptions.mdx
│ ├── custom-exceptions.mdx
│ ├── result-patterns.mdx
│ ├── sealed-error-types.mdx
│ └── error-handling-best-practices.mdx
├── 12-coroutines-and-asynchronous/
│ ├── concurrency-overview.mdx
│ ├── coroutine-fundamentals.mdx
│ ├── suspend-functions.mdx
│ ├── coroutine-scopes.mdx
│ ├── structured-concurrency.mdx
│ ├── jobs-and-cancellation.mdx
│ ├── dispatchers-and-contexts.mdx
│ ├── async-and-await.mdx
│ ├── flows-introduction.mdx
│ ├── stateflow-and-sharedflow.mdx
│ └── coroutine-testing.mdx
├── 13-files-and-serialization/
│ ├── file-reading-and-writing.mdx
│ ├── paths-and-directories.mdx
│ ├── command-line-arguments.mdx
│ ├── environment-variables.mdx
│ ├── json-serialization.mdx
│ ├── kotlinx-serialization.mdx
│ └── configuration-management.mdx
├── 14-modules-and-build-tools/
│ ├── packages-and-imports.mdx
│ ├── project-structure.mdx
│ ├── gradle-basics.mdx
│ ├── kotlin-dsl.mdx
│ ├── dependencies-and-repositories.mdx
│ ├── multi-module-projects.mdx
│ ├── build-variants-and-tasks.mdx
│ └── publishing-libraries.mdx
├── 15-testing-and-code-quality/
│ ├── testing-fundamentals.mdx
│ ├── kotlin-test.mdx
│ ├── junit-and-kotlin.mdx
│ ├── unit-testing.mdx
│ ├── integration-testing.mdx
│ ├── mocking-and-test-doubles.mdx
│ ├── coroutine-testing.mdx
│ ├── detekt-static-analysis.mdx
│ ├── ktlint-formatting.mdx
│ └── continuous-integration.mdx
├── 16-java-interoperability/
│ ├── calling-java-from-kotlin.mdx
│ ├── calling-kotlin-from-java.mdx
│ ├── platform-types.mdx
│ ├── nullability-interop.mdx
│ ├── jvm-annotations.mdx
│ ├── extension-functions-and-java.mdx
│ └── java-migration-guide.mdx
├── 17-android-development/
│ ├── android-and-kotlin.mdx
│ ├── android-studio-project-setup.mdx
│ ├── activity-and-lifecycle.mdx
│ ├── jetpack-compose-introduction.mdx
│ ├── composable-functions.mdx
│ ├── layouts-and-material-design.mdx
│ ├── state-and-recomposition.mdx
│ ├── navigation-compose.mdx
│ ├── viewmodel-and-stateflow.mdx
│ ├── networking-and-apis.mdx
│ ├── local-persistence.mdx
│ ├── permissions-and-security.mdx
│ └── android-testing.mdx
├── 18-backend-development/
│ ├── kotlin-backend-overview.mdx
│ ├── ktor-introduction.mdx
│ ├── routing-and-handlers.mdx
│ ├── request-validation.mdx
│ ├── rest-api-development.mdx
│ ├── database-integration.mdx
│ ├── authentication-and-authorization.mdx
│ ├── logging-and-monitoring.mdx
│ └── backend-deployment.mdx
├── 19-kotlin-multiplatform/
│ ├── multiplatform-overview.mdx
│ ├── project-configuration.mdx
│ ├── common-and-platform-source-sets.mdx
│ ├── expect-and-actual.mdx
│ ├── multiplatform-libraries.mdx
│ ├── compose-multiplatform.mdx
│ └── multiplatform-testing.mdx
├── 20-projects/
│ ├── command-line-calculator.mdx
│ ├── expense-tracker.mdx
│ ├── task-manager.mdx
│ ├── weather-app.mdx
│ ├── android-notes-app.mdx
│ ├── rest-api-service.mdx
│ ├── multiplatform-app.mdx
│ └── capstone-project.mdx
├── reference/
│ ├── kotlin-cheatsheet.mdx
│ ├── syntax-reference.mdx
│ ├── collection-functions.mdx
│ ├── null-safety-reference.mdx
│ ├── coroutine-reference.mdx
│ ├── gradle-commands.mdx
│ ├── common-errors.mdx
│ ├── glossary.mdx
│ └── official-resources.mdx
└── assets/
├── images/
├── diagrams/
└── examples/