twiddles

js/strudel.mjs

@@ -134,11 +134,25 @@ class Hap {
         return new Hap(this.whole, this.part, func(this.value))
     }
 
-    has_onset() {
+    hasOnset() {
         // Test whether the event contains the onset, i.e that
         // the beginning of the part is the same as that of the whole timespan."""
         return (this.whole != undefined) && (this.whole.begin.equals(this.part.begin))
     }
+
+    spanEquals(other) {
+        return((this.whole === undefined && other.whole === undefined)
+               || this.whole.equals(other.whole)
+              )
+    }
+
+    equals(other) {
+        return(this.spanEquals(other)
+               && this.part.equals(other.part)
+               // TODO would == be better ??
+               && this.value === other.value
+        )
+    }
 }
 
 class Pattern {
@@ -146,8 +160,6 @@ class Pattern {
         this.query = query
     }
 
-
-
     splitQueries() {
         // Splits queries at cycle boundaries. This makes some calculations 
         // easier to express, as all events are then constrained to happen within 
@@ -157,14 +169,20 @@ class Pattern {
         }
         return new Pattern(query)
     }
-//     def with_query_span(self, func):
-//         """ Returns a new pattern, with the function applied to the timespan of the query. """
-//         return Pattern(lambda span: self.query(func(span)))
 
-//     def with_query_time(self, func):
+    withQuerySpan(func) {
-//         """ Returns a new pattern, with the function applied to both the begin
+        return new Pattern(span => this.query(func(span)))
-//         and end of the the query timespan. """
+    }
-//         return Pattern(lambda span: self.query(span.with_time(func)))
+
+    withQueryTime(func) {
+        // Returns a new pattern, with the function applied to both the begin
+        // and end of the the query timespan
+        return new Pattern(span => this.query(span.withTime(func)))
+    }
+
+    //withEventSpan(func) {
+
+    //}
 
 //     def with_event_span(self, func):
 //         """ Returns a new pattern, with the function applied to each event
@@ -431,3 +449,4 @@ function pure(value) {
 }
 
 export {TimeSpan, Hap, Pattern, pure, Fraction}
+

test/pattern.test.mjs

@@ -5,7 +5,7 @@ import { strict as assert } from 'assert';
 import {TimeSpan, Hap, Pattern, pure} from "../js/strudel.mjs";
 
 describe('TimeSpan', function() {
-  describe('equal()', function() {
+  describe('equals()', function() {
     it('Should be equal to the same value', function() {
       assert.equal((new TimeSpan(0,4)).equals(new TimeSpan(0,4)), true);
     });
@@ -18,11 +18,27 @@ describe('TimeSpan', function() {
 });
 
 describe('Hap', function() {
-    describe('has_onset()', function() {
+    describe('hasOnset()', function() {
       it('True if part includes onset from whole', function() {
-        assert.equal(new Hap(new TimeSpan(0,1), new TimeSpan(0,1), "thing").has_onset(), true);
+        assert.equal(new Hap(new TimeSpan(0,1), new TimeSpan(0,1), "thing").hasOnset(), true);
       });
     });
+    var a = new Hap(new TimeSpan(Fraction(0), Fraction(0.5)), new TimeSpan(Fraction(0), Fraction(0.5)), "a")
+    var b = new Hap(new TimeSpan(Fraction(0), Fraction(0.5)), new TimeSpan(Fraction(0), Fraction(0.5)), "b")
+    var c = new Hap(new TimeSpan(Fraction(0), Fraction(0.25)), new TimeSpan(Fraction(0), Fraction(0.5)), "c")
+    var d = new Hap(undefined, new TimeSpan(Fraction(0), Fraction(0.5)), "d")
+    var e = new Hap(undefined, new TimeSpan(Fraction(0), Fraction(0.5)), "e")
+    describe('spanEquals', function() {
+      it('True if two haps have the same whole and part', function() {
+        assert.equal(a.spanEquals(b), true)
+      })
+      it('False if two haps don\'t the same whole and part', function() {
+        assert.equal(a.spanEquals(c), false)
+      })
+      it('True if two haps have the same part and undefined wholes', function() {
+        assert.equal(d.spanEquals(e), true)
+      })
+    })
   });
   
 describe('Pattern', function() {