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

..._constraint UNIQUE ((payload::text), name); – writofmandamus Oct 6 '17 at 22:22 add a comment...
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How do I show my global Git configuration?

... Thanks, I upvoted you both. I wanted to know the git config --list command because I can look at the effective config in a repository and I can differ local, global and system config with the appropriate parameter (--global, --local, --system). I'll accept your answer as soon as I'm able to beca...
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Press alt + numeric in bash and you get (arg [numeric]) what is that?

Press alt + numeric in bash and you get (arg [numeric]) what is that? 7 Answers 7 ...
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if else in a list comprehension [duplicate]

...d that if putting the condition in the beginning, then it requires both if and else (it must yield an element) - but putting it at the end, requires the if only (you can't put an else there). – Jeppe Dec 9 '18 at 13:07 ...
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Dynamic array in C#

... The question (albeit short and undescriptive) isn't asking about a generic list - Question could be asking about dynamic[] msdn.microsoft.com/en-GB/library/dd264736.aspx (array of dynamic types) or ExpandoObject msdn.microsoft.com/en-us/library/… I c...
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Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]

I have been googling for about 90 minutes now and still don't have an answer to this. Where do I set default_url_options ? I've already set it for config.action_mailer.default_url_options to solve this same bug elsewhere, but now I'm getting this error when trying to use a URL helper inside an ...
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Imitating a blink tag with CSS3 animations

..., it's much simpier. You can add webkit prefix to get it working in Chrome and Safari. – m93a Apr 15 '13 at 18:31 2 ...
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How can I update window.location.hash without jumping the document?

... This is the better answer, in my opinion. – Greg Annandale Jun 10 '14 at 21:15 10 Note that push...
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uncaught syntaxerror unexpected token U JSON

...or "uncaught syntaxerror unexpected token U" when I run my page in chrome. And in firefox I get, "JSON.parse: unexpected character". I'm returning the json data from a php file and the returning json string is valid. I checked it with http://jsonlint.com/ . Any help would be appreciated... Thanks....
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What are the differences between a UIView and a CALayer?

..., both represent different data. What are the differences between a UIView and a CALayer? 6 Answers ...