math: inf,nan,fmod for the JS backend (#11246)

vlib/math/evaluate.v

@@ -0,0 +1,18 @@
+module math
+
+// Provides functions that don't have a numerical solution and must
+// be solved computationally (e.g. evaluation of a polynomial)
+
+pub fn polynomial(z f64, coeff []f64) f64 {
+	n := coeff.len
+	if n == 0 {
+		return 0.0
+	}
+
+	mut sum := coeff[n - 1]
+	for i := n - 1; i >= 0; i-- {
+		sum *= z
+		sum += coeff[i]
+	}
+	return sum
+}