mirror of https://github.com/japl-lang/japl.git
140 lines
2.4 KiB
Plaintext
140 lines
2.4 KiB
Plaintext
// Example file to test JAPL's syntax
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// Mathematical expressions
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2 + 2;
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-1 * 6;
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3 * (9 / 2); // Parentheses for grouping
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8 % 2; // Modulo division
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6 ** 9; // Exponentiation
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~5; // Binary NOT
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2 ^ 5; // XOR
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3 & 9; // AND
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9 | 3; // OR
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// Variable definition and assignment
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var name = "bob"; // Dynamically typed
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name = "joe"; // Can only be assigned if it's defined
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del name; // Delete a variable
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var foo; // Unitialized variables are equal to nil
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// Scoping
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var a = "global";
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var b = "global1";
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{ // open a new scope
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var b = "local"; // Shadow the global variable
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print(a); // This falls back to the global scope
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print(b);
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}
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print(a);
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print(b); // The outer scope isn't affected
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/*
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A multiline comment
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yay!
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*/
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// Control flow statements
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var n = 0;
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while (n <= 10) { // While loops
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if (n <= 5) { // If statements
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print(n);
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}
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n = n + 1;
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}
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for (var i = 0; i < 10; i = i + 1) { // For loops
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print(i);
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}
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// Functions
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print(clock()); // Function calls
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fun count(n) { // Function definitions
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if (n > 1) count(n - 1); // Recursion works
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print(n);
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}
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count(3);
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// Closures work too!
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var a = "global";
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{
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fun showA() {
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print(a);
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}
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showA();
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var a = "block";
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showA();
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}
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// Nested functions
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fun makeCounter() {
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var i = 0;
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fun count() {
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i = i + 1;
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print(i);
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}
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return count;
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}
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var counter = makeCounter();
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counter(); // "1".
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counter(); // "2".
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// Classes
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class Person {
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init(name) { // Class initializer
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this.name = name;
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}
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greet() { // Methods don't use the 'fun' keyword!
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print("Hello, " + this.name); // this refers to the current instance
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}
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}
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var bob = Person("Bob"); // Object creation
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bob.greet(); // Prints Hello, Bob
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var greetbob = bob.greet; // Functions and methods are first-class objects! (classes are too)
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greetbob();
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class Male < Person { // Male inherits from person
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init(name) {
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super.init(name); // Inherits constructor behavior
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this.sex = "male";
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}
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greet() {
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super.greet(); // Inherits behavior from superclass
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}
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}
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var mark = Male("Mark");
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mark.greet();
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// Strings
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"string slicing!"[0]; // 0-indexed
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"ranges work too"[0:5];
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"implicit end"[3:]; // Ends at the end of the string
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"implicit start"[:5]; // From 0 to 5
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"hello" + " world"; // Strings are immutable!
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"hello" * 3; //hellohellohello
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