rttc - npm Package Compare versions

Comparing version 8.1.0 to 8.1.1

lib/coerce-exemplar.js

@@ -54,12 +54,27 @@ /**
     else if (_.isArray(valuePart)) {
-      // multi-item arrays become pattern arrays
-      if (valuePart.length > 1) {
+      // empty arrays just become generic arrays
+      if (valuePart.length === 0) {
+        return valuePart;
+      }
+      // NON-empty arrays become pattern arrays
+      // (any extra items beyond the first are folded together, in order to deduce the best pattern exemplar)
+      else {
         // To do this, we union together all of the items in the array,
         // then use the result as our deduced pattern.
+        var pattern = _.reduce(valuePart.slice(1), function (patternSoFar, item) {
+          patternSoFar = union(patternSoFar, _recursivelyCoerceExemplar(item), true, false);  // <= recursive step
+          // meaning of `union` flags, in order:
+          //  • `true` (yes these are exemplars)
+          //  • `false` (no, don't use strict validation rules)
+          return patternSoFar;
+        }, _recursivelyCoerceExemplar(valuePart[0]) /* <= recursive step */);
+
+        // If the narrowest common schema for the pattern is "===" (ref), that means
+        // the schema for the entire pattern array is `['===']`.  If that's the case,
+        // we can simply think of it as `[]` (generic/heterogeneous array), since there's
+        // no material guarantee of homogeneity anyways (and since that way you're less
+        // likely to inadverently deduce any weird conclusions about mutability).
+        // So for our purposes here:   `['===']` is the same as `[]`
         return [
-          _.reduce(valuePart.slice(1), function (patternSoFar, item) {
-            item = _recursivelyCoerceExemplar(item); // <= recursive step
-            patternSoFar = union(patternSoFar, item, true, false);  // <= flags are `true` (yes these are exemplars) and `false` (no, don't use strict validation rules)
-            return patternSoFar;
-          }, _recursivelyCoerceExemplar(valuePart[0]) /* <= recursive step */)
+          pattern
         ];
@@ -66,0 +81,0 @@ }

package.json

 {
   "name": "rttc",
-  "version": "8.1.0",
+  "version": "8.1.1",
   "description": "Runtime type-checking for JavaScript.",
@@ -5,0 +5,0 @@ "main": "index.js",

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4543

increased by0.31%

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