入门 Swift 第三章

折腾 › Swift
, ,

字符串插值

可以在字符串中插入表达式

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let num = 3
let times = 3

print("\(num) 乘以 \(times) 是 \(num * times)")

遍历个字典看看

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let list = [
  "Bill Gates": "Microsoft",
  "Steve Jobs": "Apple",
  "Lawrence Edward Larry Page": "Google"
]

for item in list {
  print(item)
}
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(key: "Steve Jobs", value: "Apple")
(key: "Lawrence Edward Larry Page", value: "Google")
(key: "Bill Gates", value: "Microsoft")

爽

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let list = [
  "Bill Gates": "Microsoft",
  "Steve Jobs": "Apple",
  "Lawrence Edward Larry Page": "Google"
]

for item in list {
  if item.key == "Steve Jobs" {
    print(item.key, item.value)
  } else {
    print(item.value, item.key)
  }
}
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Microsoft Bill Gates
Steve Jobs Apple
Google Lawrence Edward Larry Page

看起来不错