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When should one use final for method parameters and local variables?
...can do the preceding with out making String name final to get the compiler error (which I never said you couldn't) but you could easily make the compiler error go away setting name after the switch statement which throws away the expression semantics or worse forgetting to break which you cannot cau...
error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘c...
error: cannot dynamic_cast ‘b’ (of type ‘class Base*’) to type ‘class Derived*’ (source type is not polymorphic)在将父类型转换为子类型时,可以使用static_cast和dynamic_cast.如果使用dynamic_cast,它要求父类必须为多态的,即要求至少有一个虚函数,因此....
虚拟机安装CentOS出错：EDD:Error 8000 reading sector 2106934 - 环境配置...
EDD:Error 8000 reading sector 2106934
No DEFAULT or UI configuration directive found!
boot:
Getting closer!
When i start to install every thing seem to be fine.
1.Select language k
2.select location k
3.configure keyboard k
4.network config k
then it gets stuck on a purple screen with n...
NuGet Package Manager errors when trying to update
... Issue
If you are running VS 2010 SP1, you might run into an installation error when attempting to upgrade NuGet if you have an older version installed.
The workaround is to simply uninstall NuGet and then install it from the VS Extension Gallery. See http://support.microsoft.com/kb/2581019 for mo...
No identities were available - administrator request
...he old one was probably expired which is one of the biggest causes for the error message you saw)
Verify that your bundle ID is correct (CaSe SeNsEtIvE)
Back to XCode Organizer - Devices. Click TEAM (Left sidebar) and click "Refresh" (right-bottom). You will find XCode fetch the new profile. If new ...
Test if something is not undefined in JavaScript
I'm checking if(response[0].title !== undefined) , but I get the error:
11 Answers
11...
How to get a dependency tree for an artifact?
...:tree
Unfortunately dependency mojo must use pom.xml or you get following error:
Cannot execute mojo: tree. It requires a project with an existing pom.xml, but the build is not using one.
2) Find pom.xml of your artifact in maven central repository
Dependencies are described In pom.xml of your ar...
typecast string to integer - Postgres
...er as well as to_number(<column_name>,'9999999') but I am getting errors, as there are a few empty fields, I need to retrieve them as empty or null into the new table.
...
Constant pointer vs Pointer to constant [duplicate]
...pointer
constant_pointer.c: In function ‘main’:
constant_pointer.c:13: error: increment of read-only variable ‘ptr’
Hence we see very clearly above that compiler complains that we cannot changes the address held by a constant pointer.
Pointer to Constants
#include<stdio.h>
int mai...
Twitter API returns error 215, Bad Authentication Data
...= false". We have traced down that it is cURL SSL certificate verification error, that makes Twitter library always return empty response.
– lubosdz
May 14 '15 at 15:20
add a ...