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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
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Is it possible to insert multiple rows at a time in an SQLite database?
...at you will need to break it up into 500 element blocks (sqlite.org/limits.html)
– Jamie Cook
Mar 6 '11 at 6:02
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How to edit incorrect commit message in Mercurial? [duplicate]
...ledgestockpile.blogspot.com/2010/12/changing-commit-message-of-revision-in.html
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How can I convert an RGB image into grayscale in Python?
...atplotlib.
Background:
http://matplotlib.sourceforge.net/api/colors_api.html
http://en.wikipedia.org/wiki/HSL_and_HSV
Alternatively, you could use PIL or the builtin colorsys.rgb_to_yiq() to convert to a colorspace with a true luma value. You could also go all in and roll your own luma-only co...
What are some resources for getting started in operating system development? [closed]
...hing OS written in ANSI C for x86
http://pdos.csail.mit.edu/6.828/2012/xv6.html
XV6 source - as a printed booklet with line numbers
http://pdos.csail.mit.edu/6.828/2012/xv6/xv6-rev7.pdf
XV6 book - explains the main ideas of os design
http://pdos.csail.mit.edu/6.828/2012/xv6/book-rev7.pdf
The mate...
How to pass arguments to a Button command in Tkinter?
...d=fce)
See: http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/extra-args.html
For more buttons you can create a function which returns a function:
def fce(myX, myY):
def wrapper(x=myX, y=myY):
pass
pass
pass
return x+y
return wrapper
button1 = Tk.Button(m...
Casting interfaces for deserialization in JSON.NET
... or Serialize(JsonWriter, Object, Type)." Source: newtonsoft.com/json/help/html/…
– Mafii
May 21 '17 at 19:34
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How to express infinity in Ruby?
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http://www.ruby-doc.org/stdlib-1.9.3/libdoc/bigdecimal/rdoc/BigDecimal.html#label-Infinity
1.9.3p429 :025 > BigDecimal('Infinity')
=> #<BigDecimal:7f8a6c548140,'Infinity',9(9)>
1.9.3p429 :026 > BigDecimal('-Infinity')
=> #<BigDecimal:7f8a6a0e3728,'-Infinity',9(9)>
1.9....
How to amend older Git commit? [duplicate]
... terminal, this page is a very good reference cs.colostate.edu/helpdocs/vi.html
– flopshot
Sep 6 '18 at 15:45
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Why are primes important in cryptography?
...icle is from 2014 (m.phys.org/news/2014-11-largest-factored-quantum-device.html) Have we seen any public data from 2016? Not to exclude what might be classified. Although it can't run Shors Algorithm, D-Wave is now over 1000 qbits
– stujo
Sep 14 '16 at 14:44
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