But Ruby is dynamic, so those caches can't necessarily live forever. If we call String#gsub , for example, and then undef it without expiring the method cache, it'll still be reachable. Cache invalidation is hard, as we know, so MRI takes a somewhat brute force approach.
How MRI's Method Caches Work
Currently, MRI has two types of method caches. Ruby code is compiled down to MRI's instructions . Each instruction has some data associated with it. The send …
- A Fresh Cup: Double Shot #1108
- Phusion Corporate Blog: Phusion Passenger 3.0.14 released
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- Segment7: Verifying benchmarks with ministat
- Matthew Bass: RubyConf 2012 recap
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…reason for unspecified behaviors is a failure to specify Ruby's coercion protocol, so String#+ is unspecified if the other is not a String, even though all Ruby implementations will call to_str on the other to attempt to coerce it. The coercion protocol has been underspecified for a long time, and it's understandable that the group punted on it, but because it is heavily relied on by real-life code, it is important that we actually describe the behavior.
This week, I am in …
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- Headius: Invokedynamic in JRuby: Constant Lookup
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- Momoro Machine: Hack the planet
- Blog on Applicake's ideas, Ruby on Rails and Internet start-ups: Writing a JavaScript debugger in... JavaScript!
…the program.
These ruby_eval commands will output into the tempfile that redirect_stdout created, so you'll need to tail -f that file in a different console. Now, with that small headache over with, you can see exactly where your program is and if there is a stupid loop where you forgot to check a boundary condition, or what thing you're doing with a regular expression on where you should have just used String#index .
Written by Jon Yurek .
- New Relic: Debugging Stuck Ruby Processes - What to do Before You Kill -9
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- Giles Bowkett: A Simple Protocol For "You Are Not Your Code"
- Headius: Refining Ruby
- Ruby News: Unintentional file creation caused by inserting a illegal NUL character
Upgrade to Rails 4 - An ebook from Philip De Smedt covering what you'll need to change on the way from Rails 3.
sidr - jQuery plugin for developing responsive side menus.
Awesome Print for RubyMotion - Dump RubyMotion objects in a pretty format.
fast_blank - String#blank reimplemented in C for speed.
- Viget.com Blogs: Using Time Zones with Rails
- giant robots smashing into other giant robots: Giving thanks
- Hobo Blog: Hobo 2.0.0 released!
- Ruby Inside: This Week in Ruby: JRuby 1.7.0, Passenger 4.0b1, Ruby 2.0 Feature Freeze
- Scout ~ The Blog: The year at Scout - 2012 edition
- Opscode Blog: Chef 11 Released!
…variable that starts with a capital letter. Class and module names like Object, Kernel, String, are all constants defined under the Object class. When I say constants are both lexical and hierarchically accessed, what I mean is that at access time we first search outward through lexically-enclosing scopes, and failing that we search through the class hierarchy of the innermost scope. For example:
Here, the first two constant accesses inside class B are successful; the first ( IN FOO) is located …
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- RubyLearning Blog: Free Course: An Introduction to JRuby
…suggested checking $; (it's a special global variable that defines the default separator for String#split ). It was OK.
In an attempt to look smarter than I am, I suggested reply.method(:split).source_location to see if the String class had been monkey-patched by something annoying. Nope. (Though this is a handy trick if you do want to detect if anyone's tampered with something.)
Someone suggested Mr. Ysr23 show us reply.codepoints.to_a : # reply.codepoints.to_a …
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The "refine" method takes a class or module (the String class, in this case) and a block. Within the block, methods defined (camelize) are added to what might be called a patch set (a la monkey-patching) that can be applied to specific scopes in the future. The methods are not actually added to the refined class ( String) except in a "virtual" sense when a body of code activates the refinement via the "using" method.
The "using" method takes a refinement-containing …
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- Opscode Blog: Ohai 6.14.0 released
- Ruby Inside: The Mega Ruby News and Release Roundup for February 2012
- Giles Bowkett: Rails Went Off The Rails: Why I'm Rebuilding Archaeopteryx In CoffeeScript
…for issue #101 - Mock#respond_to? doesn't work with a String argument - thanks to @ urbanautomaton .
Fix for issue #105 - Travis CI link in the README - thanks to @ cknadler .
Various improvements to automated testing of integration with test libraries.
Make deprecation warnings more prominent.
- Viget.com Blogs: Testing Google Analytics with PhantomJS
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…collide their hash values each other . This fix changes the Hash function of String object from the MurmurHash to SipHash 2-4 .
Solution
Please update to ruby-1.9.3 patchlevel 327 if you are using ruby 1.9 versions. Please update to trunk revision 37575 or later if you are using ruby 2.0.0 preview1 or ruby trunk. In addition to it, all ruby applications that accept input data from untrusted entity for parsing should restrict the size of the input data to reasonable …
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…OSes and other libraries tend not. They usually treat a NUL as an End of String mark. So to interface them with Ruby, NUL chars should properly be avoided.
However methods like IO#open did not check the filename passed to them, and just passed those strings to lower layer routines. This led to create unintentional files like this: p File.exists?("foo") #=> false open("foo\0bar", "w") { |f| f.puts "hai" } p File.exists?("foo") …
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- Paul Gross's Blog: Useful unix tricks - part 3