1、沒有了親切的C語言for循環(huán)，先上代碼
var hhArr:Array =[1,2,423,12,123435,2,123,12,234,563,412,3,34,12,4,45,1234,6,23,41,35,4652,34,15,234,124,21,123,23,123,123,12,3,23,4,536,23,124,5,1,24,345,124,5,1234,45,723,4,124,234,124,12,3,123,123,234,4567,546,45,67,456]
var stratTime = CACurrentMediaTime()
//forin 遍歷（只有value）
for num in hhArr {
print(num)
}
var duration:String = String(format: "%.7f", (CACurrentMediaTime() - stratTime))
print("forin執(zhí)行時間\(duration) \n")
stratTime = CACurrentMediaTime()
//Range 遍歷 (index，value)
for index in 0..<hhArr.count {
print("index:\(index),value:\(hhArr[index])");
}
duration = String(format: "%.7f", (CACurrentMediaTime() - stratTime))
print("Range執(zhí)行時間\(duration) \n")
stratTime = CACurrentMediaTime()
//enmerated 遍歷 (offset奶赔，value)
for num in hhArr.enumerated() {
let rs:String = "index:\(num.offset) value:\(num.element)";
print(rs);
}
duration = String(format: "%.7f", (CACurrentMediaTime() - stratTime))
print("enmerated執(zhí)行時間\(duration) \n")
stratTime = CACurrentMediaTime()
//enmerated 賦值遍歷 (index，value)
for (index,value) in hhArr.enumerated() {
print("index:\(index),value:\(value)");
}
duration = String(format: "%.7f", (CACurrentMediaTime() - stratTime))
print("enmerated賦值執(zhí)行時間\(duration) \n")
stratTime = CACurrentMediaTime()
//enmerated 反向遍歷 (index杠氢，value)
for (index,value) in hhArr.enumerated().reversed() {
print("index:\(index),value:\(value)");
}
duration = String(format: "%.7f", (CACurrentMediaTime() - stratTime))
print("enmerated倒序執(zhí)行時間\(duration) \n")
stratTime = CACurrentMediaTime()
2站刑、統(tǒng)計分析
image.png
