Comments (11)
+1
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this is indeed useful and not hard to implement. +1
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one thing I realized while coding it is that since objects are passed by reference they will end up being updated/edited during the merge, so the proper way of implementing it to avoid undesired side-effects is to clone
the object before merging...
what do you guys think? should it also clone arrays?
Current behavior:
var obj1 = {a: 1, b : { c: 1}};
var obj2 = {a: 2, b : { c : { d : 2 } }};
var obj3 = { b : { e : 3 } };
merge(obj1, obj2, obj3); // { a: 2, b : { c : { d : 2 }, e : 3 } }
// since objects are passed by reference this weird behavior happens
// obj2 is also affected during merge
obj1.b === obj2.b; // true
obj2.b.e === 3; // true
PS: I didn't merged this into master yet since current behavior is funky
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Yes, I would say both objects and arrays should be cloned. Some people would then say, "what about object/class instances?"; I, however, have never found myself wanting to merge any structure that contains such things... only plain data objects.
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Also, you may find some of the discussion interesting in this JSFixed thread: https://github.com/JSFixed/JSFixed/issues/16
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bump!
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@satazor thanks for the "bump!", I've been busy lately and forgot about it. Merged into master.
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@millermedeiros Is the committed behavior still funky?
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@JamesMGreene now it clones all the Object
/Array
/Date
/RegExp
, so it shouldn't cause any side-effects. see specs for more info
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Greats, thanks!
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@millermedeiros no problem! I was long waiting for this function :D
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Related Issues (20)
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