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The 'Access-Control-Allow-Origin' header contains multiple values

...rties.Settings.Default.Cors, "", "")) as well as app.UseCors(CorsOptions.AllowAll); on the server. This results in two header entries. Just use the latter one and it works. share | improve this a...
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Match linebreaks - \n or \r\n?

... had to match exclusively on linebreaks instead of using the s -flag ( dotall - dot matches linebreaks). 5 Answers ...
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How do I use shell variables in an awk script?

...o it becomes a part of it. If you want to make an awk that changes dynamically with use of variables, you can do it this way, but DO NOT use it for normal variables. variable="line one\nline two" awk 'BEGIN {print "'"$variable"'"}' line one line two Here is an example of code injection: variabl...
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How to reload apache configuration for a site without restarting apache

I have edited the variable AllowOverride for one of my websites in sites-enabled directory. How do I reload the new configuration without restarting apache? Is it possible? ...
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What does Class mean in Java?

...nt which type is Class<?>, So Class<?> is more convenient for all situation. – petertc Oct 5 '18 at 7:08  |  show 1 more comment ...
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How to generate a random alpha-numeric string?

...er that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated). ...
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What does “javascript:void(0)” mean?

...rator is often used merely to obtain the undefined primitive value, usually using “void(0)” (which is equivalent to “void 0”). In these cases, the global variable undefined can be used instead (assuming it has not been assigned to a non-default value). An explanation is provi...
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Error type 3 Error: Activity class {} does not exist

...the Build directory Restarted Android Studio Rebuild the Project Run Optionally (Go to the files menu on android, click on "Invalidate Caches / Restart..." uninstall the app on your phone and try again) And everything worked fine! I think the key is to restart your IDE. Hope this helps you or a...
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Parallel.ForEach vs Task.Factory.StartNew

... The first is a much better option. Parallel.ForEach, internally, uses a Partitioner<T> to distribute your collection into work items. It will not do one task per item, but rather batch this to lower the overhead involved. The second option will schedule a...
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Escape double quotes in parameter

... batch file myscript.bat containing just @echo.%1 or even @echo.%~1, I get all quotes: '"test"' Perhaps you can try the escape character ^ like this: myscript '^"test^"'? share | improve this answe...