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String concatenation in MySQL

I am using MySQL and MySQL Workbench 5.2 CE. When I try to concatenate 2 columns, last_name and first_name , it doesn't work : ...
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Is inject the same thing as reduce in ruby?

I saw that they were documented together here . Are they the same thing? Why does Ruby have so many aliases (such as map/collect for arrays)? Thanks a lot. ...
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Why is Attributes.IsDefined() missing overloads?

Inspired by an SO question. The Attribute class has several overloads for the IsDefined() method. Covered are attributes applied to Assembly, Module, MemberInfo, ParameterInfo. The MemberInfo overload covers PropertyInfo, FieldInfo, EventInfo, MethodInfo, ConstructorInfo. ...
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Open files in 'rt' and 'wt' modes

Several times here on SO I've seen people using rt and wt modes for reading and writing files. 4 Answers ...
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Struggling trying to get cookie out of response with HttpClient in .net 4.5

I've got the following code that works successfully. I can't figure out how to get the cookie out of the response. My goal is that I want to be able to set cookies in the request and get cookies out of the response. Thoughts? ...
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How to play a local video with Swift?

I have a short mp4 video file that I've added to my current Xcode6 Beta project. 9 Answers ...
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How to redirect stderr to null in cmd.exe

I have an application that logs a lot of noise to stderr and REALLY slows down the execution of the application. I would like to redirect that output to null. Is this possible with cmd.exe? ...
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Should I use scipy.pi, numpy.pi, or math.pi?

In a project using SciPy and NumPy, should I use scipy.pi , numpy.pi , or math.pi ? 2 Answers ...
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What happened to “Always refresh from server” in IE11 developer tools?

Do the F12 developer tools in Internet Explorer 11 also have the "Always refresh from server" feature of the developer tools in IE 8-10? ...
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How do I change the highlight style in Vim spellcheck?

...t now, when I do :set spell in my Vim, I get spelling errors highlighted as if they are selected text. What I want is an MS-Word like underlining of spelling errors. I tried to lookup :help spell but could not find a clue. Any help is appreciated. ...