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How does Rails keep track of which migrations have run for a database?
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Rails creates a table in your database called schema_migrations to keep track of which migrations have run.
The table contains a single column, version. When Rails runs a migration, it takes the leading digits in the migration's file name and inserts a row for that "version",...
Effects of changing Django's SECRET_KEY
I made a mistake and committed my Django project's SECRET_KEY into a public repository.
5 Answers
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How to use/install gcc on Mac OS X 10.8 / Xcode 4.4
... Apple LLVM version 6.0 (clang-600.0.51) (based on LLVM 3.5svn) Target: x86_64-apple-darwin14.0.0 Thread model: posix So am I using gcc?
– Thomas
Dec 14 '14 at 16:11
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Fastest way to check if a string matches a regexp in ruby?
...y
require 'benchmark'
str = "aacaabc"
re = Regexp.new('a+b').freeze
N = 4_000_000
Benchmark.bm do |b|
b.report("str.match re\t") { N.times { str.match re } }
b.report("str =~ re\t") { N.times { str =~ re } }
b.report("str[re] \t") { N.times { str[re] } }
b.report("re =~ str...
Why does installing Nokogiri on Mac OS fail with libiconv is missing?
...official solution from the Nokogiri docs (nokogiri.org/tutorials/installing_nokogiri.html#mac_os_x), and the only one that worked on El Capitan. The accepted solution did not work there.
– Johannes
Oct 17 '15 at 20:11
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What's the difference between ViewData and ViewBag?
...ed, here is the source:
http://www.asp.net/whitepapers/mvc3-release-notes#_Toc2_4
MVC 2 controllers support a ViewData
property that enables you to pass data
to a view template using a late-bound
dictionary API. In MVC 3, you can also
use somewhat simpler syntax with the
ViewBag prope...
How to sort in mongoose?
...work in mongoose 2.3.0 :)
// Find First 10 News Items
News.find({
deal_id:deal._id // Search Filters
},
['type','date_added'], // Columns to Return
{
skip:0, // Starting Row
limit:10, // Ending Row
sort:{
date_added: -1 //Sort by Date Added DESC
}
},
function(err,allNews...
How does one remove an image in Docker?
...s using windows powershell: docker ps -aq | Foreach-Object { docker stop $_; docker rm $_; }
– fartwhif
Dec 16 '18 at 22:00
add a comment
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When is -XAllowAmbiguousTypes appropriate?
... Foo a where
whichOne :: a -> String
instance Foo a where
whichOne _ = "a"
instance Foo [a] where
whichOne _ = "[a]"
-- |
-- >>> main
-- [a]
main :: IO ()
main = putStrLn $ whichOne (undefined :: [Int])
But GHC is not okay with overlapping instances when neither is clearly a b...
node.js: read a text file into an array. (Each line an item in the array.)
...ade by Windows, I had to split \r\n but that broke Macs; so a more robust; _array = string.replace(/\r\n/g,'\n').split('\n'); worked for both
– Will Hancock
May 5 '15 at 15:37
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