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Search and replace a line in a file in Python

I want to loop over the contents of a text file and do a search and replace on some lines and write the result back to the file. I could first load the whole file in memory and then write it back, but that probably is not the best way to do it. ...
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What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?

... SET XACT_ABORT ON instructs SQL Server to rollback the entire transaction and abort the batch when a run-time error occurs. It covers you in cases like a command timeout occurring on the client application rather than within SQL Server itself (which isn't covered by the default XACT_ABORT OFF setti...
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Is the “struct hack” technically undefined behavior?

... It's not clear if it's legal or portable, but it is rather popular. and: ... an official interpretation has deemed that it is not strictly conforming with the C Standard, although it does seem to work under all known implementations. (Compilers which check array bounds carefully might iss...
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OSGi: What are the differences between Apache Felix and Apache Karaf?

...her features such as a console, an SSH remoting mechanism, a file deployer and more. In this diagram of the Karaf architecture, Felix (or other OSGi implementation - currently Equinox is also supported) is the OSGi box, the other boxes are the features added by Karaf: Therefore, unless you have ...
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Remote Connections Mysql Ubuntu

... been unable to connect remotely to my MySQL server. I've tried everything and I'm still getting errors. 5 Answers ...
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PHP: If internet explorer 6, 7, 8 , or 9

... This is what I ended up using a variation of, which checks for IE8 and below: if (preg_match('/MSIE\s(?P<v>\d+)/i', @$_SERVER['HTTP_USER_AGENT'], $B) && $B['v'] <= 8) { // Browsers IE 8 and below } else { // All other browsers } ...
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jquery live hover

...ery 1.4.1 now supports "hover" for live() events, but only with one event handler function: $("table tr").live("hover", function () { }); Alternatively, you can provide two functions, one for mouseenter and one for mouseleave: $("table tr").live({ mouseenter: function () { }, mous...
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List of all special characters that need to be escaped in a regex

...tml You need to escape any char listed there if you want the regular char and not the special meaning. As a maybe simpler solution, you can put the template between \Q and \E - everything between them is considered as escaped. ...
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Changing navigation bar color in Swift

...r?.tabBar.tintColor = UIColor.yellow On the last two, replace brownColor and yellowColor with the color of your choice. share | improve this answer | follow ...
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How to get default gateway in Mac OSX

... when Time Warner's modem decided it wanted the IP my router used to have, and ifconfig lied about the gateway. – Chris Doggett Jun 20 '13 at 3:05 add a comment ...