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#2447 closed bug (worksforme)

Opened March 03, 2008 09:22AM UTC

Closed March 10, 2008 04:30AM UTC

$.extend overwrites inner objects nstead of extending

Reported by: aercolino Owned by:
Priority: major Milestone: 1.2.4
Component: core Version: 1.2.3
Keywords: Cc:
Blocked by: Blocking:

After writing:

var z = $.extend( {a: 1, b: {c: {d: 2}}, f: 5}, {a: 3, b: {c: {e: 4


I'd expect:

z == {a: 3, b: {c: {d: 2, e: 4}}, f: 5}

But I get:

z == {a: 3, b: {c: {e: 4}}, f: 5}

(Undocumented 'deep' parameter only works for the 1st level)

Attachments (0)
Change History (3)

Changed March 03, 2008 07:58PM UTC by aercolino comment:1

I think the fix could be this (line 599 of jquery-1.2.3.js)

- target[ name ] = jQuery.extend( target[ name ], options[ name ] );
+ target[ name ] = jQuery.extend( true, target[ name ], options[ name ] );

In fact, the 'deep' (true) argument should be propagated to recursion steps.

Changed March 03, 2008 08:17PM UTC by aercolino comment:2

OK, I now understand that $.extend works as expected, by overwriting any matching property in the target, so this is not a bug, but a 'true' deep option should not change to 'false' after its first recursion step.

Changed March 10, 2008 04:30AM UTC by davidserduke comment:3

resolution: → worksforme
status: newclosed

Reported "not a bug" by author.