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How does Rails keep track of which migrations have run for a database?

According to Rails doc: http://guides.rubyonrails.org/migrations.html 1 Answer 1 ...
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Overloading Macro on Number of Arguments

..." in a variadic macro. To fix this, add an unused argument (or even just a comma) after the last param in the definition of FOO(...): #define FOO(...) GET_MACRO(__VA_ARGS__, FOO3, FOO2, UNUSED)(__VA_ARGS__) (See it run on Coliru). – metal Apr 12 '17 at 12:26 ...
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Convert nested Python dict to object?

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What is an .axd file?

... from Google An .axd file is a HTTP Handler file. There are two types of .axd files. ScriptResource.axd WebResource.axd These are files which are generated at runtime whenever you use ScriptManager in your Web app. This is being generated only once whe...
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Postgres - FATAL: database files are incompatible with server

... Try this : https://gist.github.com/joho/3735740 It worked perfectly for me. In the end it also generates you 2 bash scripts to check your DB and remove the old cluster. Really Awesome. see: http://www.postgresql.org/docs/9.2/static/pg...
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Change MySQL default character set to UTF-8 in my.cnf?

...ed instead of Latin1. Obviously. # NOTE "utf8" in MySQL is NOT full UTF-8: http://mathiasbynens.be/notes/mysql-utf8mb4 [client] default-character-set = utf8mb4 [mysqld] character-set-server = utf8mb4 collation-server = utf8mb4_unicode_ci [mysql] default-character-set = utf8mb4 New Settings mys...
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How to convert a string or integer to binary in Ruby?

...eUploader: { brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
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Set breakpoint in C or C++ code programmatically for gdb on Linux

...everal attempts. We ended up with a few #ifdefs, helpfully commented here: http://hg.mozilla.org/mozilla-central/file/98fa9c0cff7a/js/src/jsutil.cpp#l66 .) share | improve this answer | ...
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What does “./bin/www” do in Express 4.x?

...var routes = require('./routes'); var user = require('./routes/user'); var http = require('http'); var path = require('path'); var app = express(); // all environments app.set('port', process.env.PORT || 3000); app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); app.us...
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How does std::move() transfer values into RValues?

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