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From "Jochen Kemnade (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TAP5-2047) ElementWrapper#find jQuery implementation is broken if there is no match
Date Tue, 08 Jan 2013 14:12:12 GMT

     [ https://issues.apache.org/jira/browse/TAP5-2047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jochen Kemnade updated TAP5-2047:
---------------------------------

    Labels: dom javascript jquery patch  (was: dom javascript jquery)
    
> ElementWrapper#find jQuery implementation is broken if there is no match
> ------------------------------------------------------------------------
>
>                 Key: TAP5-2047
>                 URL: https://issues.apache.org/jira/browse/TAP5-2047
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.4
>            Reporter: Jochen Kemnade
>              Labels: dom, javascript, jquery, patch
>         Attachments: 0001-fix-ElementWrapper-find-for-jQuery-dom-implementatio.patch
>
>
> When `ElementWrapper#find` is called with a selector that does not match any element,
an array of two `ElementWrapper`s with `undefined` elements is returned. That happens, because
the loop that turns the jquery matches into `ElementWrapper`s iterates from `0` to `matches.length
-1`. That means there is one pass for `i=0` and one pass for `i=-1`, because CoffeeScript
ranges can also be specified from the higher end to the lower one.

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