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Is there some way to PUSH data from web server to browser?

Of course I am aware of Ajax, but the problem with Ajax is that the browser should poll the server frequently to find whether there is new data. This increases server load. ...
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Linking to an external URL in Javadoc?

...follow | edited Apr 19 at 17:40 Arsen Khachaturyan 5,90933 gold badges3232 silver badges3434 bronze badges ...
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Xcode + remove all breakpoints

... press CMD(⌘)+6, in Xcode3 press CMD(⌘)+ALT+B. Select all breakpoints with CMD(⌘)+A and delete them, like deleting text, with backspace. There's no step 3 :) share | improve this answer ...
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Can I Replace Apache with Node.js?

I have a website running on CentOS using the usual suspects (Apache, MySQL, and PHP). Since the time this website was originally launched, it has evolved quite a bit and now I'd like to do fancier things with it—namely real-time notifications. From what I've read, Apache handles this poorly. I'm w...
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Using semicolon (;) vs plus (+) with exec in find

... This might be best illustrated with an example. Let's say that find turns up these files: file1 file2 file3 Using -exec with a semicolon (find . -exec ls '{}' \;), will execute ls file1 ls file2 ls file3 But if you use a plus sign instead (find . -e...
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How does the paste image from clipboard functionality work in Gmail and Google Chrome 12+?

I noticed a blog post from Google that mentions the ability to paste images directly from the clipboard into a Gmail message if you're using the latest version of Chrome. I tried this with my version of Chrome (12.0.742.91 beta-m) and it works great using control keys or the context menu. ...
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Android: show soft keyboard automatically when focus is on an EditText

I'm showing an input box using AlertDialog . The EditText inside the dialog itself is automatically focused when I call AlertDialog.show() , but the soft keyboard is not automatically shown. ...
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git diff file against its last change

Is it possible to get git to produce a diff between a specific file as it exists now, and as it existed before the last commit that changed it? ...
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When to use IMG vs. CSS background-image?

In what situations is it more appropriate to use an HTML IMG tag to display an image, as opposed to a CSS background-image , and vice-versa? ...
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Exploitable PHP functions

I'm trying to build a list of functions that can be used for arbitrary code execution. The purpose isn't to list functions that should be blacklisted or otherwise disallowed. Rather, I'd like to have a grep -able list of red-flag keywords handy when searching a compromised server for back-doors. ...