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All Ruby tests raising: undefined method `authenticate' for nil:NilClass

Most of my tests are raising the following and I don't understand why. All methods call raise the 'authenticate' error. I've checked the code if there was a method called "authenticate" but there is no such method. ...
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How can I set the default timezone in node.js?

... this google group thread, you can set the TZ environment variable before calling any date functions. Just tested it and it works. > process.env.TZ = 'Europe/Amsterdam' 'Europe/Amsterdam' > d = new Date() Sat, 24 Mar 2012 05:50:39 GMT > d.toLocaleTimeString() '06:50:39' > ""+d 'Sat Mar...
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How to concatenate multiple lines of output to one line?

...t file | grep pattern , I get many lines of output. How do you concatenate all lines into one line, effectively replacing each "\n" with "\" " (end with " followed by space)? ...
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iPhone app signing: A valid signing identity matching this profile could not be found in your keycha

...utton "Renew". After renewing and downloading updated provisioning profile all seems to work as expected, so problem is definitely solved :) Update: you may have to contact Apple to get a "Renew"-button, or they removed it -- and the solution is to just download it and add it to the keychain, no ne...
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What is the difference between localStorage, sessionStorage, session and cookies?

...stion, and a lot of the pros/cons will be contextual to the situation. In all cases, these storage mechanisms will be specific to an individual browser on an individual computer/device. Any requirement to store data on an ongoing basis across sessions will need to involve your application server si...
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Explain the use of a bit vector for determining if all characters are unique

...ge for bits. Every bit in integer value can be treated as a flag, so eventually int is an array of bits (flag). Each bit in your code states whether the character with bit's index was found in string or not. You could use bit vector for the same reason instead of int. There are two differences betwe...
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SQL update fields of one table from fields of another one

... The question is asking about how to do it without specifying all the column names. (And I am too.) – cluesque Jun 6 '12 at 16:29 2 ...
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Programmatically trigger “select file” dialog box

...Note that I used visibility: hidden, instead of display: none. You cannot call the click event on a non-displayed file input. share | improve this answer | follow ...
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How to disable all caps menu titles in Visual Studio

...nt to change the look of the Visual Studio 2012 not to show menu title in all capital letters. 11 Answers ...
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How to set environment variable for everyone under my linux system?

Can I have certain settings that are universal for all my users? 7 Answers 7 ...