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SQL UPDATE all values in a field with appended string CONCAT not working

... That's pretty much all you need: mysql> select * from t; +------+-------+ | id | data | +------+-------+ | 1 | max | | 2 | linda | | 3 | sam | | 4 | henry | +------+-------+ 4 rows in set (0.02 sec) mysql> update t se...
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How do you reinstall an app's dependencies using npm?

Is there a simple way to reinstall all packages that my app depends on (i.e. they are in my apps node_modules folder)? 9 ...
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What REALLY happens when you don't free after malloc?

... Just about every modern operating system will recover all the allocated memory space after a program exits. The only exception I can think of might be something like Palm OS where the program's static storage and runtime memory are pretty much the same thing, so not freeing mig...
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When should I use OWIN Katana?

I am new to OWIN and Katana. I really don't get why I should use OWIN, while I can use IIS . To simplify, my question is: What do I lose if I skip learning OWIN and use IIS for my websites? ...
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How to empty a list in C#?

... It's really easy: myList.Clear(); share | improve this answer | follow | ...
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How to remove RVM (Ruby Version Manager) from my system

... that will pull it: rvm implode This will remove the rvm/ directory and all the rubies built within it. In order to remove the final trace of rvm, you need to remove the rvm gem, too: gem uninstall rvm If you've made modifications to your PATH you might want to pull those, too. Check your .bas...
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Firing a double click event from a WPF ListView item using MVVM

... Please, code behind is not a bad thing at all. Unfortunately, quite a lot people in the WPF community got this wrong. MVVM is not a pattern to eliminate the code behind. It is to separate the view part (appearance, animations, etc.) from the logic part (workflow). F...
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How can I make an entire HTML form “readonly”?

...the submission form again with a confirmation message. On this second form all fields must be static. 12 Answers ...
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How to loop through all the files in a directory in c # .net?

...= Directory.GetFiles(txtPath.Text, "*ProfileHandler.cs", SearchOption.AllDirectories); That last parameter effects exactly what you're referring to. Set it to AllDirectories for every file including in subfolders, and set it to TopDirectoryOnly if you only want to search in the directory give...
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Difference between DTO, VO, POJO, JavaBeans?

...eans are reusable software components for Java that can be manipulated visually in a builder tool. Practically, they are classes written in the Java programming language conforming to a particular convention. They are used to encapsulate many objects into a single object (the bean), so that they can...