More built-ins.

examples/builtins_extended.fun

@@ -0,0 +1,49 @@
+#!/usr/bin/env fun
+
+// Built-ins: strings, array utils, iteration helpers, and math
+
+// Strings
+print(join(split("a,b,c", ","), "-"))    // -> a-b-c
+print(substr("abcdef", 2, 3))            // -> cde
+print(find("hello world", "wor"))        // -> 6
+
+// Array utils
+arr = [1, 2, 3, 2]
+print(contains(arr, 2))                  // -> 1
+print(indexOf(arr, 3))                   // -> 2
+clear(arr)
+print(len(arr))                          // -> 0
+
+// Iteration helpers
+nums = [10, 20, 30]
+print(enumerate(nums))                   // -> [[0, 10], [1, 20], [2, 30]]
+more = [100, 200, 300, 400]
+print(zip(nums, more))                   // -> [[10, 100], [20, 200], [30, 300]]
+
+// Math
+print(min(5, 9))                         // -> 5
+print(max(5, 9))                         // -> 9
+print(clamp(15, 0, 10))                  // -> 10
+print(abs(-7))                           // -> 7
+print(pow(2, 8))                         // -> 256
+random(123)                              // seed RNG
+print(randomInt(0, 3))                   // -> 0..2 (deterministic for seed 123)
+print(randomInt(5, 6))                   // -> 5
+
+/* Expected output:
+a-b-c
+cde
+6
+1
+2
+0
+[[0, 10], [1, 20], [2, 30]]
+[[10, 100], [20, 200], [30, 300]]
+5
+9
+10
+7
+256
+0
+5
+*/