From 2060e868750c649bc84f67d1d0b330b925dd4262 Mon Sep 17 00:00:00 2001
From: Felix Roos <roos@entrecode.de>
Date: Wed, 13 Apr 2022 00:25:53 +0200
Subject: [PATCH] add queryArc + update readme

---
 packages/core/README.md   |  8 +++++---
 packages/core/strudel.mjs | 16 ++++++++++------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/packages/core/README.md b/packages/core/README.md
index d570c09e..c4abf087 100644
--- a/packages/core/README.md
+++ b/packages/core/README.md
@@ -15,14 +15,14 @@ import { sequence, State, TimeSpan } from '@strudel.cycles/core';
 
 const pattern = sequence('a', ['b', 'c']);
 
-const events = pattern.query(new State(new TimeSpan(0, 2)));
+const events = pattern.queryArc(0, 1);
 
 const spans = events.map(
   (event) => `${event.value}: ${event.whole.begin.toFraction()} - ${event.whole.end.toFraction()} `,
 );
 ```
 
-spans:
+yields:
 
 ```log
 a: 0 - 1/2
@@ -33,4 +33,6 @@ b: 3/2 - 7/4
 c: 7/4 - 2
 ```
 
-[play with @strudel.cycles/core on codesandbox](https://codesandbox.io/s/strudel-core-test-qmz6qr?file=/src/index.js).
+- [play with @strudel.cycles/core on codesandbox](https://codesandbox.io/s/strudel-core-test-qmz6qr?file=/src/index.js).
+- [open color pattern example](https://raw.githack.com/tidalcycles/strudel/package-examples/packages/core/examples/canvas.html)
+- [open minimal repl example](https://raw.githack.com/tidalcycles/strudel/package-examples/packages/core/examples/metro.html)
diff --git a/packages/core/strudel.mjs b/packages/core/strudel.mjs
index ec1eaa2e..7fa58859 100644
--- a/packages/core/strudel.mjs
+++ b/packages/core/strudel.mjs
@@ -236,6 +236,10 @@ class Pattern {
     this.query = query;
   }
 
+  queryArc(begin, end) {
+    return this.query(new State(new TimeSpan(begin, end)));
+  }
+
   _splitQueries() {
     // Splits queries at cycle boundaries. This makes some calculations
     // easier to express, as all events are then constrained to happen within
@@ -686,12 +690,12 @@ class Pattern {
   }
 
   _chop(n) {
-    const slices = Array.from({length: n}, (x, i) => i);
-    const slice_objects = slices.map(i => ({begin: i/n, end: (i+1)/n}));
-    const func = function(o) {
-      return(sequence(slice_objects.map(slice_o => Object.assign({}, o, slice_o))))
-    }
-    return(this._squeezeBind(func));
+    const slices = Array.from({ length: n }, (x, i) => i);
+    const slice_objects = slices.map((i) => ({ begin: i / n, end: (i + 1) / n }));
+    const func = function (o) {
+      return sequence(slice_objects.map((slice_o) => Object.assign({}, o, slice_o)));
+    };
+    return this._squeezeBind(func);
   }
 
   // cpm = cycles per minute