Why are arrays Objects, but can not be used as a base class?

Java was a compromise between non-object languages and very slow languages of that time where everything was an object (think about Smalltalk). Even in more recent languages, having a fast structure at the language level for arrays (and usually maps) is considered a strategic goal. Most people wouldn’t like the weight of an inheritable object … Read more

How do I compile a PyQt script (.py) to a single standalone executable file for windows (.exe) and/or linux?

if you want completelly create one stand alone executable, you can try PyInstaller . i feel it’s better to create one stand alone executable than cx_freeze or py2exe (in my experience). and easy to use (full documentation available in the site). It supports Python 3.6 or newer. Pass the –onefile argument if you want to … Read more

Why does gcc not implicitly supply the -fPIC flag when compiling static libraries on x86_64

See question 3544035. Also discussed here and there. It depends on what use you will have for your static library. If you only want to link it into programs, it doesn’t need PIC code (libtool calls that a convenience library, because you could pretty much do without it, it simply helps get your compilation process … Read more

How can I compile and run c# program without using visual studio? [duplicate]

If you have .NET v4 installed (so if you have a newer windows or if you apply the windows updates) C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe somefile.cs or C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe nomefile.sln or C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe nomefile.csproj It’s highly probable that if you have .NET installed, the %FrameworkDir% variable is set, so: %FrameworkDir%\v4.0.30319\csc.exe … %FrameworkDir%\v4.0.30319\msbuild.exe …

Do programming language compilers first translate to assembly or directly to machine code?

gcc actually produces assembler and assembles it using the as assembler. Not all compilers do this – the MS compilers produce object code directly, though you can make them generate assembler output. Translating assembler to object code is a pretty simple process, at least compared with C→Assembly or C→Machine-code translation. Some compilers produce other high-level … Read more

Is it possible to compile a single C# code file with the .NET Core Roslyn compiler?

Yes, it is possible to compile a single file with csc or vbc compilers in .NET Core. To invoke the Roslyn compiler directly it is necessary to use the command line driver csc.{exe|dll} and since Roslyn in contrast to the old csc.exe does not reference mscorlib.dll implicitly it is necessary to pass a reference to … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)