所以这只是下面的一些类似的示例代码。我试图把所有人的身高都加在一起,这样我就可以得到平均水平。我似乎无法弄清楚如何用一系列词典来做到这一点。我也使用Xcode 3.字典中的值总和 - Swift
let people = [
[
"name": "John Doe",
"sex": "Male",
"height": "183.0"
],
[
"name": "Jane Doe",
"sex": "Female",
"height": "162.0"
],
[
"name": "Joe Doe",
"sex": "Male",
"height": "179.0"
],
[
"name": "Jill Doe",
"sex": "Female",
"height": "167.0"
],
]
下面的代码似乎只是创建新的空数组。
var zero = 0.0
var peopleHeights = Double(player["height"]!)
var totalHeights = zero += peopleHeights!
下面的代码双打所以不是我所期待的每个单独的值。
var zero = 0.0
var peopleHeights = Double(player["height"]!)
var totalHeights = peopleHeights.map {$0 + $0}
在下面的代码中,我得到了响应:Double类型的值没有成员reduce。
var peopleHeights = Double(player["height"]!)
var totalHeights = peopleHeights.reduce(0.0,combine: +)
任何帮助,将不胜感激。
'player'是一个数组,你期望'player [“height”]'做什么? – njzk2