switch(expression){casevalue1:// 当 expression 等于 value1 时执行的代码break;casevalue2:// 当 expression 等于 value2 时执行的代码break;default:// 当没有匹配项时执行的代码} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 2. 执行效率对比 从执行效率的角度来看,i
1. if-else 两个调用相同的Function,但是参数不同, 通常情况性能下降一半 2 使用Constants 或者Load/Fetch来替代大量的if-elseif实现查找表 lookup table 3 使用多个if语句替代if-elseif以使用少量的ALU来替代分支语句。 4 switch-case优化 1. if-else 两个调用相同的Function,但是参数不同, 通常情况性能下降一半...
The results show that the switch statement is faster to execute than the if-else-if ladder. This is due to the compiler's ability to optimise the switch statement. In the case of the if-else-if ladder, the code must process each if statement in the order determined by the programmer. ...
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...
If vs Switch Caseis one of clarity. It shouldn't make much difference in term of performance.
Expression.SwitchCase Method (Expression, array<Expression[]) Microsoft Silverlight will reach end of support after October 2021. Learn more. Creates a SwitchCase for use in a SwitchExpression. Namespace: System.Linq.Expressions Assembly: System.Core (in System.Core.dll) Syntax VB 複製 'Dec...
Use of switch case statements as a cleaner, more maintainable way of doing something that you often see done with else/if statements.
Case Study: A Few Packets Are Dropped 2 Minutes After the Multicast Service Is Enabled on a SwitchInvolved Products and Versions S series switches of all versions Networking Description As shown in the figure, a switch is upstream to a multicast server and downstr...
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Check whether the called view is a text editor, in which case it would make sense to automatically display a soft input window for it. (Inherited from View) OnCommitCompletion(CompletionInfo) Called by the framework in response to a text completion from the current input method, provided ...