implement parser breaks

1 files changed, 12 insertions, 0 deletions

diff --git a/util/number.ts b/util/number.ts
index c28864f..98b7e50 100644
--- a/util/number.ts
+++ b/util/number.ts
@@ -9,3 +9,15 @@ Number.prototype.toChar = function() {
 	return String.fromCharCode(this as number);
 }
 
+/** @summary get minimum of valid numbers, returns NaN when no valid values are entered */
+export function min(...values: Array<number | null | undefined>) {
+  values.push(NaN); // make sure .reduce doesn't crash
+  return (values.filter(v => typeof v === "number") as Array<number>)!.reduce((acc, v) => acc = v < acc ? v : acc);
+}
+
+/** @summary get maximum of valid numbers, returns NaN when no valid values are entered */
+export function max(...values: Array<number | null | undefined>) {
+  values.push(NaN); // make sure .reduce doesn't crash
+  return (values.filter(v => typeof v === "number") as Array<number>)!.reduce((acc, v) => acc = v > acc ? v : acc);
+}
+