exception

what does Error “Thread 1:EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)” mean?

由 久未见 提交于 2020-01-09 03:21:07
问题 I got this error: Thread 1:EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) How can I solve this? The code works normally, but in the calculator when I click the only equal button, it gives that error. @IBAction func equals(sender: AnyObject) { secondNumber = Screen.text!.toInt()! // here it shows an error which is "Thread 1:EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)" if operation == "+"{ result = firstNumber + secondNumber } else if operation == "-" { result = firstNumber -

method called after release() exception unable to resume with android camera

由 旧巷老猫 提交于 2020-01-08 19:40:24
问题 While developing a camera app I've encountered an exception that only happened when I switch to other app ( onPause() for my app). 01-15 17:22:15.017: E/AndroidRuntime(14336): FATAL EXCEPTION: main 01-15 17:22:15.017: E/AndroidRuntime(14336): java.lang.RuntimeException: Method called after release() 01-15 17:22:15.017: E/AndroidRuntime(14336): at android.hardware.Camera.setPreviewDisplay(Native Method) 01-15 17:22:15.017: E/AndroidRuntime(14336): at android.hardware.Camera.setPreviewDisplay

Cost of exception handlers in Python

由 时光毁灭记忆、已成空白 提交于 2020-01-08 14:05:27
问题 In another question, the accepted answer suggested replacing a (very cheap) if statement in Python code with a try/except block to improve performance. Coding style issues aside, and assuming that the exception is never triggered, how much difference does it make (performance-wise) to have an exception handler, versus not having one, versus having a compare-to-zero if-statement? 回答1: Why don't you measure it using the timeit module? That way you can see whether it's relevant to your

Cost of exception handlers in Python

由 北战南征 提交于 2020-01-08 14:04:11
问题 In another question, the accepted answer suggested replacing a (very cheap) if statement in Python code with a try/except block to improve performance. Coding style issues aside, and assuming that the exception is never triggered, how much difference does it make (performance-wise) to have an exception handler, versus not having one, versus having a compare-to-zero if-statement? 回答1: Why don't you measure it using the timeit module? That way you can see whether it's relevant to your

Cost of exception handlers in Python

由 丶灬走出姿态 提交于 2020-01-08 14:03:04
问题 In another question, the accepted answer suggested replacing a (very cheap) if statement in Python code with a try/except block to improve performance. Coding style issues aside, and assuming that the exception is never triggered, how much difference does it make (performance-wise) to have an exception handler, versus not having one, versus having a compare-to-zero if-statement? 回答1: Why don't you measure it using the timeit module? That way you can see whether it's relevant to your

Collection was modified; enumeration operation may not execute in ArrayList [duplicate]

由 谁都会走 提交于 2020-01-08 11:25:41
问题 This question already has answers here : How to remove elements from a generic list while iterating over it? (26 answers) Closed 6 years ago . I'm trying to remove an item from an ArrayList and I get this Exception: Collection was modified; enumeration operation may not execute. Any ideas? 回答1: You are removing the item during a foreach , yes? Simply, you can't. There are a few common options here: use List<T> and RemoveAll with a predicate iterate backwards by index, removing matching items

【maven】java.lang.ClassNotFoundException

由 守給你的承諾、 提交于 2020-01-07 15:15:33
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 项目背景： 使用maven创建的java web项目，yongmaven管理依赖。 异常描述： SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:532) at org.apache.catalina.core.DefaultInstanceManager

It is impossible to create a new session because 'createSession' which takes HttpClient,

由 ↘锁芯ラ 提交于 2020-01-07 09:19:09
问题 org.openqa.selenium.WebDriverException: It is impossible to create a new session because 'createSession' which takes HttpClient, InputStream and long was not found or it is not accessible Build info: version: '3.12.0', revision: '7c6e0b3', time: '2018-05-08T14:04:26.12Z' I am getting this error randomly i want to know the route cause for this issue in IOS 回答1: There are multiple reason behind this issue. There are multiple ways to resolve this issues, depending upon, where these issues are

Mock exception raised from class method with side effect gives 'did not raise'

由 时光怂恿深爱的人放手 提交于 2020-01-07 07:59:09
问题 Note: This question is based on a previous question I asked but modified to be different according to this answer . Using side_effect, I am trying to raise a 'URLError' exception when a mock is called but I get a DID NOT RAISE error that I do not understand. I have a Query class with a class method make_request_and_get_response which can raise several exceptions. I am not catching the 'URLError' exception within the get_response_from_external_api method in main.py , so I should be able to

form validation exception not catching by Exception in laravel 5.1?

由 戏子无情 提交于 2020-01-07 06:49:08
问题 In laravel5, I have catching all error at app/Exceptions/Handler@render function and it was working fine. code given below, public function render($request, Exception $e) { $error_response['error'] = array( 'code' => NULL, 'message' => NULL, 'debug' => NULL ); if ($e instanceof HttpException && $e->getStatusCode() == 422) { $error_response['error']['code'] = 422; $error_response['error']['message'] = $e->getMessage(); $error_response['error']['debug'] = null; return new JsonResponse($error
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