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ActionController::Base.new.read_fragment('key') | |
ActionController::Base.new.expire_fragment('key') |
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FATAL -- : error adding listener addr= | |
/Users/k/.rbenv/versions/1.9.3-p429/lib/ruby/gems/1.9.1/gems/unicorn-4.6.2/lib/unicorn/socket_helper.rb:200:in `server_cast': undefined method `getsockname' for nil:NilClass (NoMethodError) |
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command Ruby19Hashes %s/\v:(\w+)(\s*)\=\>/\1:/g |
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h = ActiveSupport::HashWithIndifferentAccess.new {|h,k| h[k] = [] } | |
# => {} | |
h[:key1] | |
# => [] | |
h[:key1] << 13 | |
# => [13] | |
h | |
# => {"key1"=>[13]} | |
h[:key2] << 31 | |
# => [31] |
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irb(main):003:0> def assign=(val); raise "THE WORLD IS BROKEN!"; end | |
=> nil | |
irb(main):004:0> self.assign = 10 | |
RuntimeError: THE WORLD IS BROKEN! | |
from (irb):3:in `assign=' | |
from (irb):4 | |
from C:/Program Files (x86)/ruby-1.9.2/bin/irb:12:in `<main>' | |
irb(main):005:0> assign = 10 | |
=> 10 | |
irb(main):006:0> |
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class C | |
attr_accessor :counter | |
def initialize | |
@counter = 1 | |
end | |
def increment | |
counter = counter + 1 | |
end |
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def val | |
13 | |
end | |
def assign | |
val = val.to_s | |
end | |
p assign | |
# => "" |
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def f | |
p x | |
end | |
f() | |
# undefined local variable or method `x' for main:Object (NameError) | |
def f | |
if false | |
x = 13 |
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h = {a: 13, b: 31} | |
# => {:a=>13, :b=>31} | |
h.merge(h) {|k, v0, v1| v0 * 2 } | |
# => {:a=>26, :b=>62} |
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class C | |
attr_reader :read_only | |
def assert(assertion, message="assertion failed") | |
raise RuntimeError, message unless assertion | |
end | |
def initialize | |
@read_only = 13 | |
assert read_only == 13 |