Ruby 哈希有点扁平化

Question

有了这个哈希数组，:

a = [{"red"=>"130"}, {"blue"=>"94"}, {"green"=>"57"}]

我想像这样得到一个完整的扁平散列:

{"red"=>"130", "blue"=>"94", "green"=>"57"}

Answer 1

[{"red"=>"130"}, {"blue"=>"94"}, {"green"=>"57"}].reduce(:merge)
# => {"red"=>"130", "blue"=>"94", "green"=>"57"} 

注意事项:

1. 将为空数组返回nil
2. 两者:Enumerable#reduce和 Enumerable#inject会工作