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MySQL - Using COUNT(*) in the WHERE clause

...ause that They Don't Bother To Teach Properly on sql courses or books and knowing about it generally the sign that the coder has progressed beyond novice level. – Cruachan Nov 19 '08 at 12:59 ...
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Error 1022 - Can't write; duplicate key in table

...out this sort of thing when I opened the project. – SnowInferno Oct 1 '14 at 0:17 Thank you, mate :) That helps me a l...
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Gem::LoadError for mysql2 gem, but it's already in Gemfile

...e with a specific mysql version like below gem 'mysql2', '~> 0.3.18' Now stop the server and run bundle bundle install Now restart your server. It should work. rails s share | improve thi...
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What is 'Currying'?

...function that takes two arguments, a and b, and returns their sum. We will now curry this function: function add (a) { return function (b) { return a + b; } } This is a function that takes one argument, a, and returns a function that takes another argument, b, and that function returns th...
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Android - startActivityForResult immediately triggering onActivityResult

... I know this is old, but this was so absolutely invaluable to me that I wanted to say thanks to the user, and point out for anyone jumping between activities that this is freaking gold! Saved my ass during a hackathon ;) ...
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Exception messages in English?

... many times when I simply dumped localized exception messages into Google, now it's not available anymore. – Martin Braun May 18 at 13:52 ...
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Where is Android Studio layout preview?

...16) The newer Android Studio version changed the location of this button. Now if you want to see the layout design preview you will need to press one of the buttons at the top right of your xml. The button that looks like an image icon will open the design dashboard, while the button next to it wil...
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Make header and footer files to be included in multiple html pages

...l <a href="http://www.google.com">click here for google</a> Now, when you visit index.html, you should be able to click the link tags. share | improve this answer | ...
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“No newline at end of file” compiler warning

... foo.cpp. What if the last line of foo.h was a comment without a new line? Now the first line of foo.cpp is commented out. These are just a couple of examples of the types of problems that can creep up. Just wanted to point any interested parties to James' answer below. While the above answer is ...
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git-svn: how do I create a new svn branch via git?

... I know this question has been answered a while ago, but after reading it, I it might help adding examples of the specific git svn branch command and relate it to a typical workflow. Like kch answered, use git svn branch. Here i...