核心数据结构与语法
探索 Clojure 的基本数据结构，例如列表、向量、映射和集合，并学习基础语法。
核心数据结构与语法 是 CoddyKit 上的免费 Clojure Functional Programming & JVM Backend Development 课时。 这是第 2 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 Clojure Functional Programming & JVM Backend Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Clojure Functional Programming & JVM Backend Development 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
Clojure's Building Blocks
Now the core: Clojure's fundamental data structures and the simple syntax that makes it so expressive.
S-Expressions: The Core Syntax
Clojure is built from S-expressions: parenthesized lists where the first element is a function and the rest are its arguments. Everything is an expression.
Basic Literals: Numbers & Strings
The basic literals are numbers, double-quoted strings, and the booleans true/false — each evaluates to itself.
(ns coddykit.core
(:gen-class))
(defn -main
"Basic literals in action."
[& args]
(println 123)
(println "Hello, CoddyKit!")
(println true))Lists: Ordered & Flexible
A list in parentheses is treated as a function call by default. To make it data, quote it with an apostrophe like '(1 2 3).
Vectors: Indexed & Efficient
Vectors use square brackets and are zero-indexed. Prefer them over lists when you want fast positional access.
(ns coddykit.core
(:gen-class))
(defn -main
"Lists and Vectors demo."
[& args]
(let [my-list '(apple banana cherry)
my-vec [10 20 30]]
(println "First list item:" (first my-list))
(println "Second vector item:" (nth my-vec 1))))Maps: Key-Value Pairs
Maps store key-value pairs in curly braces, usually with keyword keys like :name — perfect for structured data.
Sets: Unique & Unordered
A set in #{} holds unique, unordered items and silently drops duplicates. Ideal for fast membership checks.
Keywords: Self-Evaluating Identifiers
Keywords start with a colon, like :email. They are self-evaluating constants, used everywhere as efficient map keys.
(ns coddykit.core
(:gen-class))
(defn -main
"Maps, Sets, and Keywords demo."
[& args]
(let [person {:name "Alice" :age 30 :city "London"}
skills #{"Clojure" "Java" "SQL"}]
(println "Person's name:" (:name person))
(println "Has Clojure skill?" (contains? skills "Clojure"))))Symbols: Referring to Things
A symbol is a name that refers to a variable or function. Clojure resolves it on evaluation; quote it ('sym) to treat it as data.
Quick Check: Clojure Structures
Which of the following Clojure data structures is best suited for storing a collection of unique items where order doesn't matter?
Recap: Core Data & Syntax
Recap: S-expressions drive the syntax, with lists, vectors, maps, sets, keywords, and symbols as your core building blocks.
常见问题解答
「核心数据结构与语法」课时是免费的吗？
是的 — 「核心数据结构与语法」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Clojure Functional Programming & JVM Backend Development 课程的其余内容，请升级到 CoddyKit PRO。 Clojure Functional Programming & JVM Backend Development 课程共包含 4 节课。
「核心数据结构与语法」这节课中我会学到什么？
探索 Clojure 的基本数据结构，例如列表、向量、映射和集合，并学习基础语法。 你通过在浏览器中直接运行的动手代码来练习 Clojure Functional Programming & JVM Backend Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 Clojure Functional Programming & JVM Backend Development 需要有经验吗？
无需任何先前经验。CoddyKit 上的 Clojure Functional Programming & JVM Backend Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 2 节课，共 4 节。
「核心数据结构与语法」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 Clojure Functional Programming & JVM Backend Development 课中编写并运行代码吗？
能。每节 Clojure Functional Programming & JVM Backend Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。