如何通過功能參數

Question

這是我的天賦的幫手之一：

def remove_slides_from_page(to_delete_array, to_leave_array, button_name) 
    to_delete_array.map { |slide| 
    page.check("slide_select_#{slide.id}") 
    } 

    click_button(button_name) # <- I would like to pass this command(s) as an argument 

    to_leave_array.map { |slide| 
    expect(page).to have_selector("tr#slide_#{slide.id}") 
    expect(page).to have_field("slide_select_#{slide.id}") 
    expect(page).to have_field("slide_delete_#{slide.id}", visible: false) 
    expect(page).to have_field("slide_move_#{slide.id}", visible: false) 
    } 
    to_delete_array.map {|slide| 
    expect(page).to_not have_selector("tr#slide_#{slide.id}") 
    expect(page).to_not have_field("slide_select_#{slide.id}") 
    expect(page).to_not have_field("slide_delete_#{slide.id}") 
    expect(page).to_not have_field("slide_move_#{slide.id}") 
    }   
end 

與其說這remove_slides_from_page(@foo, @bar, "baz")我希望能夠通過click_button("baz")作爲其最後一個參數（拉姆達？）不知何故。我想問你的幫助，因爲我不知道如何在Ruby中製作它。

Answer 1

使用yield：

def remove_slides_from_page(to_delete_array, to_leave_array) 
    to_delete_array.map { |slide| 
    page.check("slide_select_#{slide.id}") 
    } 

    yield 

    to_leave_array.map { |slide| 
    expect(page).to have_selector("tr#slide_#{slide.id}") 
    expect(page).to have_field("slide_select_#{slide.id}") 
    expect(page).to have_field("slide_delete_#{slide.id}", visible: false) 
    expect(page).to have_field("slide_move_#{slide.id}", visible: false) 
    } 
    to_delete_array.map {|slide| 
    expect(page).to_not have_selector("tr#slide_#{slide.id}") 
    expect(page).to_not have_field("slide_select_#{slide.id}") 
    expect(page).to_not have_field("slide_delete_#{slide.id}") 
    expect(page).to_not have_field("slide_move_#{slide.id}") 
    }   
end 

remove_slides_from_page(to_delete_array, to_leace_array) { click_button('baz') }