Created
March 19, 2018 07:08
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Basic Statements
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| // 1. for 循环条件筛选 | |
| let urlStrings: [String?] = ["https://baidu.com", nil, "https://im.qq.com"] | |
| for case let urlString? in urlStrings where !urlString.isEmpty { | |
| if let u = URL(string: url) { | |
| print(u) | |
| } | |
| } | |
| // 2. |
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