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How expensive is the lock statement?
I've been experimenting with multi threading and parallel processing and I needed a counter to do some basic counting and statistic analysis of the speed of the processing. To avoid problems with concurrent use of my class I've used a lock statement on a private variable in my class:
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ViewBag, ViewData and TempData
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TempData
Basically it's like a DataReader, once read, data will be lost.
Check this Video
Example
public class HomeController : Controller
{
public ActionResult Index()
{
ViewBag.Message = "Welcome to ASP.NET MVC!";
TempData["T"] = "...
Set environment variables from file of key/value pairs
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Although reading the file line-by-line and passing each line to export is not ideal, the problem can also be fixed by simply using input redirection on the loop: while read line; do ... ; done < ./conf/$1.
– c...
How does libuv compare to Boost/ASIO?
... with other Boost libraries. For example, Boost.Asio will not provide a thread abstraction, as Boost.Thread already provides one.
On the other hand, libuv is a C library designed to be the platform layer for Node.js. It provides an abstraction for IOCP on Windows, kqueue on macOS, and epoll on Li...
Why are these constructs using pre and post-increment undefined behavior?
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Reading the Standard and the published rationale, It's clear why the concept of UB exists. The Standard was never intended to fully describe everything a C implementation must do to be suitable for any particular purpose (se...
List submodules in a Git repository
... WARNING: awk fails for submodules with spaces! The command should read git config -z --file .gitmodules --get-regexp '\.path$' | sed -nz 's/^[^\n]*\n//p' | tr '\0' '\n' (you need a modern sed with -z). This fails for paths with Newlines in them (they can be created with git mv). If you w...
How do I read the source code of shell commands?
I would like to read the actual source code which the linux commands are written with. I've gained some experience using them and now I think it's time to interact with my machine at a deeper level.
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In mongoDb, how do you remove an array element by its index?
...approach is not atomic and can cause some race conditions if other clients read and/or write between the two operations. If we need the operation to be atomic, we could:
Read the document from the database
Update the document and remove the item in the array
Replace the document in the database. T...
Lost connection to MySQL server at 'reading initial communication packet', system error: 0
I am getting error:
31 Answers
31
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Setting Environment Variables for Node to retrieve
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@mibbit yes, that's what dotenv is all about, as it will read your .env file and apply it.
– balexandre
Feb 21 '19 at 10:39
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