feat(math): add clamp min, val, max func

Author: kollhof

src/math.fnk

@@ -66,6 +66,9 @@ sign = Math.sign
 max = Math.max
 min = Math.min
 
+clamp = fn min_val, value, max_val:
+  max min_val, min value, max_val
+
 int_mul = Math.imul
 
 random = Math.random

src/math.test.fnk

@@ -1,6 +1,6 @@
 {describe, it, expect, to_equal} = import '@fink/jest'
 
-{π} = import './math'
+{π, clamp} = import './math'
 
 
 describe 'math', fn:
@@ -9,3 +9,13 @@ describe 'math', fn:
       π
       to_equal Math.PI
 
+
+  it 'clamp', fn:
+    expect
+      clamp 0, -1, 2
+      to_equal 0
+
+    expect
+      clamp 0, 3, 2
+      to_equal 2
+