switch 语句是 JavaScript 的"条件"语句的一部分,用于根据不同的条件执行不同的操作。使用 switch 选择要执行的许多代码块之一。这是长的嵌套 if/else 语句的完美解决方案。switch 语句计算表达式。然后将表达式的值与结构中每个 case 的值进行比较。如果匹配,则执行关联的代码块。
The slowest test in 2012 was 1-31 times slower compared to the fastest, while in 2021, it was 36-107% slower. Chrome still has the poorest performance on this test, but its performance has improved significantly from being 32 times slower in 2012 to only 2 times slower presently. switch ...
JavaScript Tutorial:JavaScript Switch Statement JavaScript Reference:JavaScript if/else Statement JavaScript Reference:JavaScript break Statement Browser Support switchis an ECMAScript1 (JavaScript 1997) feature. It is supported in all browsers: ChromeEdgeFirefoxSafariOperaIE ...
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values = [c.get_attribute('innerText') for c in elements] javascript is faster, it takes 1/6 of the time values = driver.execute_script("var result = [];" + "var all = arguments[0];" + "for (var i=0, max=all.length; i < max; i++) {" + " result.push(all[i...
To build apps though you need a working knowledge of HTML, CSS and some JavaScript. Read the chapters, do code exercises and take quizzes at the end.- https://www.w3schools.com/html/- https://www.w3schools.com/css/- https://www.w3schoo...
A break can save a lot of execution time because it "ignores" the execution of all the rest of the code in the switch block. The default Keyword Thedefaultkeyword specifies some code to run if there is no case match: Example intday=4;switch(day){case6:System.out.println("Today is Sa...
❮ PreviousNext ❯ The switch Statement Use theswitchstatement to select one of many code blocks to be executed. Theswitchstatement in Go is similar to the ones in C, C++, Java, JavaScript, and PHP. The difference is that it only runs the matched case so it does not need abreakstat...
When JavaScript reaches abreakkeyword, it breaks out of the switch block. This will stop the execution inside the switch block. It is not necessary to break the last case in a switch block. The block breaks (ends) there anyway. Note:If you omit the break statement, the next case will ...
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