switch case 当case是某个值的时候会直接把流程执行到那里,只进行一次判断。 而多重else if,else if的层次越深,需要判断的次数就越深。如果判断条件是比较复杂的,那么就会影响性能。 就上面那个switch case 用else if也能实现 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2...
what if i cook dinner what if its all a dre what is bred in the b what is language what is lost in the h what is red a poppys what is subhealth what is the case what is the constitut what is the content o what is the most popu what is the rehealthy what is the target le...
} 把多级elseif改成switch case的话,程序执行的时候就没有判断了,直接就到了option==2的代码处了,可能耗费更少的CPU,更环保了。 其实有点类似于 从数组中找是否存在某个数一样,一般的算法是分别取得数组中的一个数和待定的数比较,而稍微高级点的办法是用了索引或者hash,直接就找到了,速度更快。
Latin is a language that employs case. Case (medicine) An instance of a specific condition or set of symptoms. There were another five cases reported overnight. Case (programming) A section of code representing one of the actions of a conditional switch. Case A box that contains or can con...
The point when a reed switch is to be connected with the inductive load or the load where forward current or high current flows (for example capacitance load, lamp, long cable and so on). Reed Switch Circuit In case an electromagnetic relay which has inductance is provided as a load in ...
Discrete event simulation (DES) is when a series of occurrences or states of being remain unchanged between each event in the series, think of an on/off switch – one moment in time it is off, and then when switched, it is on. This is usually more applicable to process modeling.Discrete...
What Is Switch Virtualization Technology & What Are Stacking and M-LAG, What Are Their Differences This document describes the concepts of stacking and Multichassis Link Aggregation Group (M-LAG), their functions on the network, as well as their differences. Overview What Are Stacking and M-LAG...
The MUX switch is a small piece of hardware on the inside of your laptop, so being able to tell if you already have one isn't always easy. It might be advertised as a feature on the laptop's product page, but this is not always the case. If you can't find the details in produc...
thus securing your information even when you're using an unsecured network. A VPN also masks your IP address so that your online identity and location remain untraceable, making it difficult for cyberthieves to pin you down. Because your IP address is hidden, you're protected against cyberattac...
Restart the switch. When the following message is displayed, press Ctrl+B or Ctrl+E immediately and enter the password to enter the BootROM/BootLoad menu. Press Ctrl+B or Ctrl+E to enter BootROM/BootLoad menu ... 2 password: //Enter the BootROM/BootLoad password. The output varies ac...