我有一个 JSON 数组,我正在循环遍历它并添加三个键和它们的值,我还想从数组中的每个元素中删除一个键(subject_id)。
如何处理这个问题?
s=JSON.parse(subjects.to_json)
s.each do |j|
j["total_classes"] = total_classes[i]
j["attended_classes"] = attended_classes[i]
j["subject_name"] = subject_name[i]
j["subject_id"] #remove this key, how?
i=i+1
end
render json: { attendances: s }