kotlin-fundamentals

Name: kotlin-fundamentals
Rating: 62
Author: pluginagentmarketplace

Kotlin语言基础——语法、空安全、数据类、扩展

SKILL.md

--- frontmatter

name: kotlin-fundamentals
description: Kotlin language fundamentals - syntax, null safety, data classes, extensions
version: "1.0.0"
sasmp_version: "1.3.0"
bonded_agent: 01-kotlin-fundamentals
bond_type: PRIMARY_BOND

execution:
  timeout_ms: 30000
  retry:
    max_attempts: 3
    backoff: exponential
    initial_delay_ms: 1000

parameters:
  required:
    - name: topic
      type: string
      validation: "^(syntax|null_safety|data_classes|extensions|collections|idioms)$"
  optional:
    - name: kotlin_version
      type: string
      default: "2.0"

logging:
  level: info
  events: [skill_invoked, topic_loaded, error_occurred]

Kotlin Fundamentals Skill

Master Kotlin programming fundamentals with production-ready patterns.

Topics Covered

Null Safety

kotlin

// Safe call + Elvis
val name = user?.name ?: "Anonymous"

// requireNotNull for validation
requireNotNull(user) { "User required" }

Data Classes

kotlin

data class User(val id: Long, val name: String) {
    init { require(name.isNotBlank()) }
}

Scope Functions

Function	Context	Returns	Use Case
`let`	it	Lambda result	Null-safe transforms
`apply`	this	Same object	Object configuration
`run`	this	Lambda result	Object scope + result
`also`	it	Same object	Side effects

Troubleshooting

Issue	Resolution
NPE despite null check	Check platform types from Java
Smart cast fails	Use local variable or let

Usage

code

Skill("kotlin-fundamentals")