Ruby中数组的修正形式

Question

我希望有人能帮忙。

我有一个数组是通过调用Google电子表格返回的，该电子表格返回如下：

{"2014 week"=>"01", "Weekly reach"=>"2.93"}
{"2014 week"=>"02", "Weekly reach"=>"3.37"}
{"2014 week"=>"03", "Weekly reach"=>"3.24"}
{"2014 week"=>"04", "Weekly reach"=>"2.39"}
{"2014 week"=>"05", "Weekly reach"=>"2.96"}
{"2014 week"=>"06", "Weekly reach"=>"6.31"}
{"2014 week"=>"07", "Weekly reach"=>"9.11"}
{"2014 week"=>"08", "Weekly reach"=>"8.59"}
{"2014 week"=>"09", "Weekly reach"=>"2.11"}
{"2014 week"=>"10", "Weekly reach"=>"2.24"}
{"2014 week"=>"11", "Weekly reach"=>"1.88"}
{"2014 week"=>"12", "Weekly reach"=>"2"}
{"2014 week"=>"13", "Weekly reach"=>"3"}
{"2014 week"=>"14", "Weekly reach"=>"2"}
{"2014 week"=>"15", "Weekly reach"=>"2"}
{"2014 week"=>"16", "Weekly reach"=>"3"}

基本上，我想将这个数组修改为以下形式：

结果= {x:1，y: 2.93}，{x:2，y:3.37}，{x:3，y:3.24}.

由于我在Ruby中的地位，我正在挣扎，但相信解决方案在于arr.map!，如果我真正理解这个函数，就不需要问这个问题了！任何帮助都将是非常感谢的。

Answer 1

map返回由每个元素的块计算结果组成的数组。所以你应该：

result = array.map do |data|
  {
    x: data['2014 week'],
    y: data['reach']
  }
end

Answer 2

马立克·利普卡说得对--我记得当时我找不到地图，所以这里有一个更详细的解释。

假设array的定义如下所示，他的答案相当于这段代码：

array = [
  {"2014 week"=>"01", "Weekly reach"=>"2.93"},
  {"2014 week"=>"02", "Weekly reach"=>"3.37"},
  {"2014 week"=>"03", "Weekly reach"=>"3.24"},
  {"2014 week"=>"04", "Weekly reach"=>"2.39"},
  {"2014 week"=>"05", "Weekly reach"=>"2.96"},
  {"2014 week"=>"06", "Weekly reach"=>"6.31"},
  {"2014 week"=>"07", "Weekly reach"=>"9.11"},
  {"2014 week"=>"08", "Weekly reach"=>"8.59"},
  {"2014 week"=>"09", "Weekly reach"=>"2.11"},
  {"2014 week"=>"10", "Weekly reach"=>"2.24"},
  {"2014 week"=>"11", "Weekly reach"=>"1.88"},
  {"2014 week"=>"12", "Weekly reach"=>"2"},
  {"2014 week"=>"13", "Weekly reach"=>"3"},
  {"2014 week"=>"14", "Weekly reach"=>"2"},
  {"2014 week"=>"15", "Weekly reach"=>"2"},
  {"2014 week"=>"16", "Weekly reach"=>"3"},
]

result = []
array.map do |data|
  result << { x: data['2014 week'], y: data['reach'] }
end
return result

因此，map做的事情和每个都完全一样，但是把它所做的任何事情的结果都推到数组中，所以您不必这样做。

希望这有助于解释，但是勾选马立克的答案--这太长了，不能发表评论