为什么当我在线程中时无法访问某些库类？
为什么下面会
require "bio"
threads = (1..2).map do
Thread.new do
seqs = ["gattaca"] * 5
alignment = Bio::Alignment.new(seqs)
end
end
threads.each {|th| th.join} ; nil
给出这个错误信息？
NameError: uninitialized constant Bio::Alignment
from (irb):6
from (irb):10:in `join'
from (irb):10
from (irb):10:in `each'
from (irb):10
Why does the following
require "bio"
threads = (1..2).map do
Thread.new do
seqs = ["gattaca"] * 5
alignment = Bio::Alignment.new(seqs)
end
end
threads.each {|th| th.join} ; nil
give this error message?
NameError: uninitialized constant Bio::Alignment
from (irb):6
from (irb):10:in `join'
from (irb):10
from (irb):10:in `each'
from (irb):10
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bioruby 库（或至少它的某些版本）使用自动加载。自动加载不是线程安全的（至少在 ruby 1.8 中），因此如果两个线程同时访问 Bio::Alignment，则可能会出现错误。
The bioruby library (or at least some versions of it) use autoload. Autoload isn't thread-safe (at least in ruby 1.8), so if two threads are accessing Bio::Alignment at the same time, you can have errors.