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Get the first key name of a javascript object [duplicate]
...engineerDave, this is future you. We've changed our stackOverflow account handle and we've made a whole bunch of money by inventing time travel, but that is beside the point. I just wanted to say, "Thanks", this little note helped me out.
– isaacdre
Oct 11 '18 ...
Getting a random value from a JavaScript array
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It is a simple one-liner
const randomElement = array[Math.floor(Math.random() * array.length)];
Example
const months = ["January", "February", "March", "April", "May", "June", "July"];
const random = Math.floor(Math.random() * months.length);
console....
Android AsyncTask testing with Android Test Framework
I have a very simple AsyncTask implementation example and am having problem in testing it using Android JUnit framework.
7...
Is Big O(logn) log base e?
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Kinopkio and bcat, thanks for helping it become useful. It was not very well-written at first. :)
– Heath Hunnicutt
Oct 15 '09 at 1:04
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Java Reflection: How to get the name of a variable?
... class files. One compile-time optimization is to remove it, saving space (and providing some obsfuscation). However, when it is is present, each method has a local variable table attribute that lists the type and name of local variables, and the range of instructions where they are in scope.
Perha...
std::mutex 加锁抛 _DEVICE_OR_RESOURCE_BUSY 异常 - C/C++ - 清泛网 - 专注C/C++及内核技术
std::mutex 加锁抛 _DEVICE_OR_RESOURCE_BUSY 异常device_or_resource_busy最近遇到一个崩溃，在 std::lock_guard<std::mutex> lock(mutex_); 的地方，抛出了_DEVICE_OR_RESOURCE_BUSY 的异常。最终查出原因是：同一个线程对同一个mutex二次加锁导致的 最近遇到...
use of deleted function std::unique_ptr 编译错误剖析，你可能少了一个st...
use of deleted function std::unique_ptr 编译错误剖析，你可能少了一个std::move编译报错日志如下： usr include c++ 4 7 bits stl_construct h:77:7: error: use of deleted function & 39;std::unique_ptr<_Tp, _Dp>::unique_ptr(const std::unique_p 编译报错日志如下：
/usr/...
未能从“const std::string”为“const std::_Tree<_Traits> &”...
http://blog.csdn.net/mfcing/article/details/44157227
error LNK2019: 无法解析的外部符号 _GetFileVersionInfoSizeW@8，该符号在...
GetFileVersionInfoSize build时出现link2019 链接错误：
#pragma comment(lib, "version")
解决。
Intel SMID指令集编译错误: inlining failed in call to always_inline \'x...
Intel SMID指令集编译错误: inlining failed in call to always_inline 'xxx': target specific option mismatch xxxintel_smid_compile_error最近在使用CPU指令集优化代码的时候，编译出错，报错如下： usr lib64 gcc x86_64-suse-linux 7 include avx2intrin h:252:1: error: inlining ...