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Diff catamorphisms.

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This commit is contained in:
Rob Rix 2015-10-23 20:27:12 -04:00
parent e152b0084c
commit 95cc7e7768
1 changed files with 8 additions and 0 deletions
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8
prototype/UI/index.html
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@ -211,6 +211,14 @@
}); });
} }
} }
// forall a. Diff a -> (Syntax a -> a) -> a
Diff.prototype.cata = function(transform) {
if (this.pure != null) { return this.pure; }
if (this.roll != null) {
return transform(this.roll.unwrap.map(function(diff) { return diff.cata(transform); }))
}
}
</script> </script>
</head> </head>
<body> <body>