Question

我想知道这是检查tryCatch函数类错误或警告的方法，例如在Java中。

try {
            driver.findElement(By.xpath(locator)).click();
            result= true;
        } catch (Exception e) {
               if(e.getMessage().contains("is not clickable at point")) {
                   System.out.println(driver.findElement(By.xpath(locator)).getAttribute("name")+" are not clicable");
               } else {
                   System.err.println(e.getMessage());
               }
        } finally {
            break;
        }

在R中我只找到以一种方式处理所有错误的解决方案，例如

result = tryCatch({
    expr
}, warning = function(w) {
    warning-handler-code
}, error = function(e) {
    error-handler-code
}, finally = {
    cleanup-code
}

Answer 1

您可以使用try来处理错误：

result <- try(log("a"))

if(class(result) == "try-error"){
    error_type <- attr(result,"condition")

    print(class(error_type))
    print(error_type$message)

    if(error_type$message == "non-numeric argument to mathematical function"){
        print("Do stuff")
    }else{
        print("Do other stuff")
    }
}

# [1] "simpleError" "error"       "condition"  
# [1] "non-numeric argument to mathematical function"
# [1] "Do stuff"

Answer 2

我们还可以使用 tryCatch 处理错误并分析发出的消息，在您的示例中，它将是 library(tidyverse) original <- tibble(x = c(1,1,1,2,2,2,4,4,4)) aggregated <- original %>% count(x) deaggregated <- aggregated %>% uncount(weights = n)。我已将您的示例改编为适用于这种情况。

e$message

（我不确定 e$message 是否可以有多个字符串，在这种情况下，您可能还需要考虑使用 result = tryCatch({ expr }, warning = function(w) { warning-handler-code }, error = function(e) { if(e$message == "This error should be treated in some way"){ error-handler-code-for-one-type-of-error-message } else{ error-handler-code-for-other-errors } }, finally = { cleanup-code } ) 函数 any

R tryCatch处理一种错误

2 个答案: