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Explain ExtJS 4 event handling

I've recently started learning ExtJS, and have trouble understanding how to handle Events. I have no experience of any previous versions of ExtJS. ...
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How to add item to the beginning of List?

... Use the Insert method: ti.Insert(0, initialItem); share | improve this answer | follow | ...
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Creating a textarea with auto-resize

...is , which I've tried. But there is one problem: the textarea doesn't shrink if you delete the content. I can't find any way to shrink it to the correct size - the clientHeight value comes back as the full size of the textarea , not its contents. ...
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How can I change a secret Gist to public?

...set it to be secret. Now I want to change the gist to public, but I can't find how to set it publi Since May, 9th 2014, it is possible: "Change the visibility of your Gists" You can change the visibility of your Gists whenever you want. When editing a Gist you'll now notice a new option to toggle ...
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Unique BooleanField value in Django?

...s) but the edit was rejected. Could any of the reviewers take time to explain why - since this would seem to be consistent with Django best practice. – scytale Oct 22 '12 at 16:57 ...
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Detecting when a div's height changes using jQuery

I've got a div that contains some content that's being added and removed dynamically, so its height is changing often. I also have a div that is absolutely positioned directly underneath with javascript, so unless I can detect when the height of the div changes, I can't reposition the div below it. ...
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Revert to a commit by a SHA hash in Git? [duplicate]

...it revert works. For example, I want to revert to a commit six commits behind the head, reverting all the changes in the intermediary commits in between. ...
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How to import an excel file in to a MySQL database

Can any one explain how to import a Microsoft Excel file in to a MySQL database? 11 Answers ...
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What is the difference between the OAuth Authorization Code and Implicit workflows? When to use each

OAuth 2.0 has multiple workflows. I have a few questions regarding the two. 9 Answers ...
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Ignoring time zones altogether in Rails and PostgreSQL

I'm dealing with dates and times in Rails and Postgres and running into this issue: 2 Answers ...