Mal
Mal Web REPL
Mal at a glance
Datatypes
| Maps | {"key1" "val1", "key2" 123} |
| Lists | (1 2 3 "four") |
| Vectors | [1 2 3 4 "a" "b" "c" 1 2] |
| Scalars | a-symbol, "a string", :a_keyword, 123, nil, true, false |
Functions
| Calling | (<function> <args*>) |
| Defining named functions | (def! <name> (fn* [<args*>] <action>)) |
| Anonymous function | (fn* [<args*>] <action>) |
Useful Macros and Special Forms
| Conditionals | if cond or |
| Multiple Actions (side-effects) | (do <action*>...) |
| Defining things | def! defmacro! let* |
| Quoting | ' ` ~ ~@ |
| Examining macros | macroexpand |
Useful Functions
| Math | + - * / |
| Comparison/Boolean | = < > <= >= not |
| Predicates | nil? true? false? symbol? keyword? string? list? vector? map? sequential? |
| Data processing | map apply |
| Data create | list vector hash-map |
| Data inspection | first rest get keys vals count get nth contains? empty? |
| Data manipulation | conj cons concat assoc dissoc |
| Lists and Vectors | first rest nth seq |
| Hash Maps | get keys vals contains? |
| Strings | str pr-str seq |
| Atoms | atom atom? deref[@] reset! swap! |
| Meta | meta with-meta[^] |
| Output | println prn |
JavaScript Interop
| Evaluate JavaScript | (js-eval "JS string to eval") |
| Method call/access | (. js-fn arg...) |