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Diff.map.

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This commit is contained in:
Rob Rix 2015-10-23 18:59:24 -04:00
parent eb598effa5
commit 57fb7dda4c
1 changed files with 13 additions and 0 deletions
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13
prototype/UI/index.html
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@ -165,6 +165,19 @@
if (object.roll != null) { this.roll = object.roll; }
return this;
}
// forall a b. Diff a -> (a -> b) -> Diff b
Diff.prototype.map = function(transform) {
if (this.pure != null) { return new Diff({ pure: transform(this.pure) }); }
if (this.roll != null) {
return new Diff({
roll: {
extract: roll.extract,
unwrap: roll.unwrap.map(function(x) { return x.map(transform); })
}
});
}
}
</script>
</head>
<body>