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How do I ALTER a PostgreSQL table and make a column unique?

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How do I change tab size in Vim?

...as to how to set things up, you'll need to read Vim docs on tabstop, shiftwidth, softtabstop and expandtab. The most interesting bit is found under expandtab (:help 'expandtab): There are four main ways to use tabs in Vim: Always keep 'tabstop' at 8, set 'softtabstop' and 'shiftwidth' to 4 (or 3 o...
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XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12

... dialog box (press Win+R), then type: services.msc Then search for World Wide Web Publishing Service (WWW-Publishing Service) and Web Deployment Agent Service and stop them. You should also disable them. Start Apache again with XAMPP :) Link Ref: https://www.sitepoint.com/unblock-port-80-on-windo...
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how to append a list object to another

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snprintf and Visual Studio 2010

...ng the terminating null character. Releases prior to Visual Studio 2015 didn't have a conformant implementation. There are instead non-standard extensions such as _snprintf() (which doesn't write null-terminator on overflow) and _snprintf_s() (which can enforce null-termination, but returns -1 on ...
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HTML Form: Select-Option vs Datalist-Option

...he use can enter whatever, use the datalist element. Edit 2: Found this tidbit in the HTML Living Standard: "Each option element that is a descendant of the datalist element...represents a suggestion." share | ...
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Correct mime type for .mp4

... According to RFC 4337 § 2, video/mp4 is indeed the correct Content-Type for MPEG-4 video. Generally, you can find official MIME definitions by searching for the file extension and "IETF" or "RFC". The RFC (Request for Comments) articles published by th...
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How can I find all matches to a regular expression in Python?

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Backbone.js: `extend` undefined?

...the comment from Tjorriemorrie into the answer? – sumid Nov 22 '12 at 22:42 add a comment  |  ...
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Right mime type for SVG images with fonts embedded

... of a sudden broke and now I have to release a new version to fix that (no idea how though, that's why I'm here!) – AlexStack Oct 20 '14 at 18:55 ...