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我有这些阵列。我只想从@teachers
数组中选择:teacher
值的实例,并将它们放入@filtered_courses
。从基于来自其他阵列的值的散列阵列中选择
@teachers = ["KAP", "CWD"]
@courses = [
{:gruppnamn=>"ESM15/15MUSINS01Str", :kurskod=>"MUSINS01S", :teacher=>"MWN", :class=>"ESM15", :points=>100.0, :kvot=>nil, :tim=>nil},
{:gruppnamn=>"ESM15/15MUSMUS01", :kurskod=>"MUSMUS01", :teacher=>"KAP", :class=>"ESM15", :points=>100.0, :kvot=>nil, :tim=>nil},
{:gruppnamn=>"Hälsostudion/15år2", :kurskod=>"IDRIDR01", :teacher=>"CWD", :class=>"ESSA", :points=>100.0, :kvot=>nil, :tim=>nil}
]
的方法选择某些元素从一个阵列被称为['select'](http://ruby-doc.org/core-2.3.0/Array。 html#method-i-select) – Stefan