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我有一個產品選項,可以計算Rails中的加權分數。如何向軌道中的數組添加計算值?
我想返回一個數組,將計算的產品分數添加到數組中。我想:
products.inject {|p| p.exponential_discount_score(0.01) }
不過的了:
NoMethodError: undefined method `exponential_discount_score' for 246.86645269006013:Float
from (irb):39:in `block in irb_binding'
from (irb):39:in `each'
from (irb):39:in `inject'
from (irb):39
from /Users/justin/.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands/console.rb:45:in `start'
from /Users/justin/.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands/console.rb:8:in `start'
from /Users/justin/.rvm/gems/[email protected]/gems/railties-3.1.1/lib/rails/commands.rb:40:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
我想inject
會的工作,但我想我做錯了什麼?我也試過.collect
,但無法正確寫入塊。