exception

Powershell catching exception type

由 人盡茶涼 提交于 2020-12-06 12:35:22
问题 Is there a convenient way to catch types of exceptions and inner exceptions for try-catch purposes? Example code: $a = 5 $b = Read-Host "Enter number" $c = $a / $b #error if $b -eq 0 $d = get-content C:\I\Do\Not\Exist Row #3 will generate a runtime error with an inner exception (EDIT: fixed this command $Error[1].Exception.InnerException.GetType()), row #4 will generate a "standard"(?) type of exception ($Error[0].Exception.GetType()). Is it possible to get the desired result from both of

Is there a way to use tryCatch (or similar) in R as a loop, or to manipulate the expr in the warning argument?

由 这一生的挚爱 提交于 2020-11-29 09:52:28
问题 I have a regression model ( lm or glm or lmer ...) and I do fitmodel <- lm(inputs) where inputs changes inside a loop (the formula and the data). Then, if the model function does not produce any warning I want to keep fitmodel , but if I get a warning I want to update the model and I want the warning not printed, so I do fitmodel <- lm(inputs) inside tryCatch . So, if it produces a warning, inside warning = function(w){f(fitmodel)} , f(fitmodel) would be something like fitmodel <- update

android - getting nullpointerexception for no specific reason

由 馋奶兔 提交于 2020-11-29 03:07:56
问题 I am working on an android project and as far as I know, I don't make any specific mistakes in my code that would lead to an exception. I get these two error lines everytime I run my project, but the rest of my code runs without any issues. The NullPointerException doesn't have a concrete occurance location , which confuses me. I have already searched for similar issues. A possible solution was adding the READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE as uses-permission in my Android

android - getting nullpointerexception for no specific reason

由 社会主义新天地 提交于 2020-11-29 03:05:37
问题 I am working on an android project and as far as I know, I don't make any specific mistakes in my code that would lead to an exception. I get these two error lines everytime I run my project, but the rest of my code runs without any issues. The NullPointerException doesn't have a concrete occurance location , which confuses me. I have already searched for similar issues. A possible solution was adding the READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE as uses-permission in my Android

How to throw exception to next catch?

由 落爺英雄遲暮 提交于 2020-11-26 07:01:46
问题 I want to throw an exception at next catch, (I attached image) Anybody know how to do this? 回答1: You can't, and trying to do so suggests that you've got too much logic in your catch blocks, or that you should refactor your method to only do one thing. If you can't redesign it, you'll have to nest your try blocks: try { try { ... } catch (Advantage.Data.Provider.AdsException) { if (...) { throw; // Throws to the *containing* catch block } } } catch (Exception e) { ... } 回答2: C# 6.0 to the

malloc()和calloc()

由 痞子三分冷 提交于 2020-11-17 07:15:46
malloc()和calloc() 进程对动态内存的请求被认为是不紧迫的。例如，当进程的可执行文件被装入时，进程并不一定立即对所有的代码进行访问。类似地，当进程调用malloc() 请求动态内存时，并不意味着进程很快就会访问所有获得的内存。因此一般来说，内核总是尽量推迟给用户态进程动态分配内存。 The kernel succeeds in deferring the allocation of dynamic memory to processes by using a new kind of resource. When a User Mode process asks for dynamic memory, it doesn't get additional page frames; instead, it gets the right to use a new range of linear addresses, which become part of its address space. This interval is called a "memory region." 内核使用一种资源成功实现了对进程动态内存的推迟分配。当用户态进程请求动态内存时，并没有获得请求的页框，而仅仅获得对一个新的线性地址区的使用权，而这一线性地址区间就成为进程地址空间的一部分
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