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How to express a NOT IN query with ActiveRecord/Rails?
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edited Nov 27 '14 at 16:05
answered Apr 14 '11 at 17:02
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Convert from ASCII string encoded in Hex to plain ASCII?
...ta if it is to be interpreted as text. Using 'latin-1' will get rid of any errors but may well produce complete gibberish if the text is not actually Latin-1.
– tripleee
Oct 5 '19 at 6:56
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How can I configure my makefile for debug and release builds?
...uild debug/release into its own folders. Example: stackoverflow.com/a/48793058/412080
– Maxim Egorushkin
Jul 9 '18 at 9:23
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What's the difference between a proc and a lambda in Ruby?
...t;Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lambda {|a, b| puts a**2+b**2 } # => #<Proc:0x15016c@(irb):5 (lambda)>
l.call 1, 2 # => 5
l.call 1 # => ArgumentError: wrong number of ...
rmagick gem install “Can't find Magick-config”
I get the error shown below when attempting to install the rmagick gem. I am on Snowleopard 10.6 using RVM, Ruby 1.9.2-head and Rails 3.05. Responses to similar questions recommended installing ImageMagick, which I successfully did. Other suggested installing the "libmagick9-dev library", however, I...
.htaccess - how to force “www.” in a generic way?
...ne On as the first line to complete it, as this could lead to a 500 Server Error if copy-pasted as it is.
– Ryan Casas
Oct 7 '15 at 16:50
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Transport endpoint is not connected
...ly (every 2 - 3 days) giving me this Transport endpoint is not connected error on my mount point and the only thing that seems to fix it is rebooting.
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C/C++ macro string concatenation
...fragment
#define PPCAT_NX(A, B) A ## B
PPCAT_NX("s", "1")
produces this error message from the preprocessing phase of gcc: error: pasting ""s"" and ""1"" does not give a valid preprocessing token
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However, for general token pasting, try this:
/*
* Concatenate preprocessor tokens A and B wit...
How can I recursively find all files in current and subfolders based on wildcard matching?
...nt to be notified about directories you don't have permission to (or other errors), you can do find . -name "foo*" 2>/dev/null
– Jobbo
Aug 15 '17 at 10:54
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