Question

我有以下代码可从github作业API编译作业。每次呼叫一个新城市时，如何将计数器重置为0？我试过将它放在几个不同的地方，没有运气。

def ft_count_and_percentage
    @@url += @city
    uri = URI(@@url)
    response = Net::HTTP.get(uri)
    result = JSON.parse(response)
    result.each do |job|
        if job["type"] == "Full Time"
            @@fulltime_count += 1
        end
    end 
    puts "Total number of jobs in #{@city}: #{result.length}"
    if @@fulltime_count > 0
        puts ("full time percent ") + "#{(@@fulltime_count/result.length) * 100}"
    else
        puts "No FT Positions"
    end 
end

@@ fulltime_count在此方法之外定义为从0开始。目前，正如预期的那样，每次添加新城市时，计数器只会不断添加工作。

    boston = Job.new("Boston")
boston.ft_count_and_percentage
sf = Job.new("San Francisco")
sf.ft_count_and_percentage
la = Job.new("Los Angeles")
la.ft_count_and_percentage
denver = Job.new("Denver")
denver.ft_count_and_percentage
boulder = Job.new("Boulder")
boulder.ft_count_and_percentage
chicago = Job.new("Chicago")
chicago.ft_count_and_percentage
ny = Job.new("New York City")
ny.ft_count_and_percentage

Answer 1

您可能需要在Job init中将其重置

class Job
  def initialize
    @@count = 0
  end

  def ft_count_and_percentage
    #the blah you already have
  end
end

重置Ruby中的计数器

1 个答案: