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What is causing this ActiveRecord::ReadOnlyRecord error?
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Rails 2.3.3 and lower
From the ActiveRecord CHANGELOG(v1.12.0, October 16th, 2005):
Introduce read-only records. If you call object.readonly! then it will
mark the object as read-only and raise
ReadOnlyRecord if you call
obje...
How to check if the user can go back in browser history or not
...with this is that in most browsers this is considered a security violation and usually just returns undefined.
history.length
Is a property that others have suggested...
However, the length doesn't work completely because it doesn't indicate where in the history you are. Additionally, it doesn't...
Where can I find my Facebook application id and secret key?
...rom 2018:
Go to Settings -> Basic -> App Secret (type your password and you're ready to go).
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How to pass arguments into a Rake task with environment in Rails? [duplicate]
...ironment using the :needs option. For example:
desc "Testing environment and variables"
task :hello, :message, :needs => :environment do |t, args|
args.with_defaults(:message => "Thanks for logging on")
puts "Hello #{User.first.name}. #{args.message}"
end
Updated per @Peiniau's comment...
Concept of void pointer in C programming
... is there is any way of generalizing a function which can receive pointer and store it in void pointer and by using that void pointer we can make a generalized function..
You cannot just dereference it in a portable way, as it may not be properly aligned. It may be an issue on some architectures ...
How to delete projects in IntelliJ 12?
...of the project you just deleted. So I am thinking there should be another (and really easy way) to delete a project.
10 Ans...
Serializing to JSON in jQuery [duplicate]
...need to serialize an object to JSON . I'm using jQuery . Is there a "standard" way to do this?
11 Answers
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Given two directory trees, how can I find out which files differ by content?
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Nice. But shorter is diff -qr dir1/ dir2/ and my extended version to diff -qr dir1/ dir2/ | grep ' differ'
– sobi3ch
Aug 7 '15 at 13:18
1
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Best C++ Code Formatter/Beautifier
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AStyle can be customized in great detail for C++ and Java (and others too)
This is a source code formatting tool.
clang-format is a powerful command line tool bundled with the clang compiler which handles even the most obscure language constructs in a coherent way.
It...
Reading and writing environment variables in Python? [duplicate]
My python script which calls many python functions and shell scripts. I want to set a environment variable in Python (main calling function) and all the daughter processes including the shell scripts to see the environmental variable set.
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