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Issue #484: _.uniq() should work with sparse arrays.

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This commit is contained in:
Kit Cambridge
2012-02-20 12:21:36 -07:00
parent 23931b2716
commit c8d4025621
2 changed files with 28 additions and 7 deletions
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22
test/arrays.js
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@@ -89,6 +89,28 @@ $(document).ready(function() {
var result = (function(){ return _.uniq(arguments); })(1, 2, 1, 3, 1, 4);
equal(result.join(', '), '1, 2, 3, 4', 'works on an arguments object');
var list = [];
list[2] = list[3] = null;
list[8] = 2;
list[10] = 2;
list[11] = 5;
list[14] = 5;
list[16] = 8;
list[19] = 8;
list[26] = list[29] = undefined;
list[33] = "hi";
var result = _.uniq(list, true);
if (0 in [undefined]) {
// According to the JScript ES 3 spec, section 2.1.26, JScript 5.x (IE <=
// 8) treats `undefined` elements in arrays as elisions.
deepEqual(result, [null, 2, 5, 8, undefined, "hi"], "Works with sorted sparse arrays");
equal(result.length, 6, "The resulting array should not be sparse");
} else {
deepEqual(result, [null, 2, 5, 8, "hi"], "Works with sorted sparse arrays where `undefined` elements are elided");
equal(result.length, 5, "The resulting array should not be sparse");
}
});
test("arrays: intersection", function() {