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Bug 493363 - Several issues in Utils.deepEquals()

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Use triple-equals to determine if two things are the same; otherwise, check if both are objects with the same keys and same values for the keys.
This commit is contained in:
Edward Lee 2009-05-19 10:53:30 -05:00
parent f370ce60e9
commit d611c2b661
1 changed files with 10 additions and 33 deletions
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43
services/sync/modules/util.js
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@ -224,42 +224,19 @@ let Utils = {
dest.__defineGetter__(prop, getter);
},
deepEquals: function Weave_deepEquals(a, b) {
if (!a && !b)
deepEquals: function eq(a, b) {
// If they're triple equals, then it must be equals!
if (a === b)
return true;
if (!a || !b)
// Grab the keys from both sides
let [A, B] = [[i for (i in a)], [i for (i in b)]];
// Don't bother doing any more if they aren't objects with same # keys
if (typeof a != "object" || typeof b != "object" || A.length != B.length)
return false;
// if neither is an object, just use ==
if (typeof(a) != "object" && typeof(b) != "object")
return a == b;
// check if only one of them is an object
if (typeof(a) != "object" || typeof(b) != "object")
return false;
let isArray = [Utils.isArray(a), Utils.isArray(b)];
if (isArray[0] && isArray[1]) {
if (a.length != b.length)
return false;
for (let i = 0; i < a.length; i++) {
if (!Utils.deepEquals(a[i], b[i]))
return false;
}
} else {
// check if only one of them is an array
if (isArray[0] || isArray[1])
return false;
for (let key in a) {
if (!Utils.deepEquals(a[key], b[key]))
return false;
}
}
return true;
// Check if both sides have the same keys and same value for the key
return A.every(function(A) B.some(function(B) A == B && eq(a[A], b[B])));
},
deepCopy: function Weave_deepCopy(thing, noSort) {