如果有两个以上 if/else 粘在一起或其大小是不可预测的块,那么您可能会非常考虑一个 switch 陈述。或者,您也可以抓住 多态性。首先创建一些界面:public interface Action { void execute(String input); }并在某些情况下掌握所有实现 Map。您可以静态或动态地执行以下操作:Map<String, Action> actions
else if ( type == candidateModeMemory[4] ) { mode_index = 4; } else if ( type == candidateModeMemory[5] ) { mode_index = 5; } else if ( type == candidateModeMemory[6] ) { mode_index = 6; } else if ( type == candidateModeMemory[7] ) { mode_index = 7; } else if ...
对比下if else 和switch的性能,并且怎么优化if else,最好我们开发时最好的方式是什么 两者的对比 使用if else 还是switch目前一般是从代码可读性的角度出发,基于判断条件的数量来决定:数量越多就越倾向于switch而不是 if else。 事实证明除了代码可读性,switch的运行速度是比 if else 更快 ...
A PHP switch statement is evaluated only once, whereas a series of if and elseif statements are evaluated every time they are specified. This slight difference can impact the expected behavior of your code, so keep this in mind. In terms of performance, there is very little performance differ...
But who's to say if Metroid Prime 4 will be a launch game, or a launch window game? Will the Switch 2 be Backwards Compatible? Here’s one thing we do know: The Switch 2 will be mostly backwards compatible. This was the first thing we learned about the Switch 2 when Shuntaro ...
If fans of the game don’t want to play as anyone from “The Pat McAfee Show,” then choose not to. It’s simple. Is there too much Pat McAfee? That’s a whole other discussion. But him being a part of “WWE 2K24” makes a lot of sense to me. He has a younger crowd; and...
The switch statement can be optimized by JavaScript engines, leading to faster code execution compared to a series of if-else statements, and it also makes it easier to add, remove, or modify cases. The switch statement provides additional functionality and techniques to improve code performance,...
The result of the switch if switchValue does not match any of the cases. comparison Type: System.Reflection.MethodInfo The equality comparison method to use. cases Type: System.Collections.Generic.IEnumerable<SwitchCase> The set of cases for this switch expression. Return Value Type: Syste...
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C++11--使用表驱动(Table-Driven)模式消除if-else和switch-case语句 常见的实现途径是通过if-else或者switch-case的方式来实现,如下代码所示: const std::string GetDayName(const int day) { std::string...dayName; } 这样的代码优势是简单,初学者也可以写出这样的代码;代码的问题在于: 1) 代码太长,逻辑重复...