Question

我来编写代码：

driver.get(#####URL#####);

WebDriverWait wait = new WebDriverWait(driver, 120);

//bypass security warning
wait.until(ExpectedConditions.presenceOfElementLocated(By.linkText("Continue to this website (not recommended).")));

WebElement webReport        = driver.findElement(By.linkText("Continue to this website (not recommended)."));
builder.moveToElement(webReport).click().perform();

//Login page            
wait.until(ExpectedConditions.presenceOfElementLocated(By.name("username")));
WebElement usernameElement = driver.findElement(By.name("username"));
WebElement passwordElement = driver.findElement(By.name("pwd"));
WebElement submitElement = driver.findElement(By.name("B1"));

usernameElement.sendKeys("ABCD.XYZ");
passwordElement.sendKeys("Abcd@1234");

js.executeScript("arguments[0].click();", submitElement);

//code breaks here at the line below, as it doesn't login on submit...and thus can't acccess "menu"
wait.until(ExpectedConditions.presenceOfElementLocated(By.className("menu")));

我期望的唯一结果|运算符是第一个命令的结果。我看到它的行为就像一个逻辑，还是在第二个命令中添加了元素。

有人可以解释|的工作吗？运算符使用整数作为运算符？

Answer 1

这只是整数值（1或1 = 1、1或0 = 1、0或1 = 1、0或0 = 0）的二进制表示的每一位之间的逻辑or

val a = 0 | 1 
//0 or 1 = 1 (1 - decimal number)

val a = 0 | 1 | 2
//00 or 01 or 10 = 11 (3 - decimal number)

val a = 0 | 1 | 2 | 3
//00 or 01 or 10 or 11 = 11 (3 - decimal number)

val a = 0 | 1 | 2 | 3 | 4
//000 or 001 or 010 or 011 or 100 = 111 (7 - decimal number)

Answer 2

|是bitwise OR运算符：

val a = 0 | 1
a: Int = 1

00  0
01  1
-----
01  1

val a = 0 | 1 | 2 | 3
a: Int = 3

00  0
01  1
10  2
11  3
------
11  3

val a = 0 | 1 | 2 | 3 | 4
a: Int = 7

000  0
001  1
010  2
011  3
100  4
-------
111  7

了解| Scala中的运算符

2 个答案: