From 5d8ccdff25478ba7355c501808c6c7daf392df0c Mon Sep 17 00:00:00 2001
From: Felix Roos <roos@entrecode.de>
Date: Sun, 13 Mar 2022 11:41:39 +0100
Subject: [PATCH] add silent flag to asNumber

---
 strudel.mjs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/strudel.mjs b/strudel.mjs
index 5e3f94a6..4659d2f6 100644
--- a/strudel.mjs
+++ b/strudel.mjs
@@ -468,8 +468,8 @@ class Pattern {
         return this.fmap(func).appLeft(reify(other))
     }
 
-    _asNumber() {
-      return this._withEvent(event => {
+    _asNumber(silent = false) {
+      return this._withEvent((event) => {
         const asNumber = Number(event.value);
         if (!isNaN(asNumber)) {
           return event.withValue(() => asNumber);
@@ -485,8 +485,11 @@ class Pattern {
           // set context type to midi to let the player know its meant as midi number and not as frequency
           return new Hap(event.whole, event.part, toMidi(event.value), { ...event.context, type: 'midi' });
         }
-        throw new Error('cannot parse as number: "' + event.value + '"');
-      });
+        if (!silent) {
+          throw new Error('cannot parse as number: "' + event.value + '"');
+        }
+        return event.withValue(() => undefined); // silent error
+      })._removeUndefineds();
     }
 
     add(other) {