Julia 1.4 release, high-performance dynamic high-level programming languages

Julia 1.4.0 is now available. Julia is a high performance dynamic high-level programming languages. It has a rich library, provides digital accuracy, fine amplifier distributed and parallel operation mode. Kernel Library written by Julia like most libraries, but also to deal with linear algebra mature C and FORTRAN library, random number generation and string processing problems. 

Updates are as follows:

The new language features

• Now, the structure having associated storage and isbitsunion isbits all fields in the array ( # 32448 ).
• importNow allows quoted symbol, for example import Base.:+( # 33158 ).
• a[begin]It can now be used to address the first element of a set of integer index a. Indexed by the firstindex(a)calculated ( # 33946 ).

Language change

• Deprecated syntax  (;)resolves to an empty block expression. In the future it will indicate an empty named tuple

Multithreading change

• $ Can now be inserted into the inner @async and @spawn value, this value will be copied directly to the base closure configuration ( # 33119 )

The establishment of system changes

• Windows Setup has switched to build Inno Setup. Setup command-line parameters have been changed. For example, to unpack the installer to a specific directory, a command line parameter is now / DIR = x: \ dirname. Use julia-installer.exe /? Lists all the new command line parameter.

The new library features

• The new only(x)function returns a collection xelement, and if x contains zero or more elements throws ArgumentError( # 33129 ).
• takewhileAnd dropwhilehave been added to Iterators sub-modules ( # 33437 ).
• accumulateIterators have been added to the sub-modules ( # 34033 ).
• There is now a evalpolyfunction intended to serve as @evalpolythe role of the macro. The macro function as efficient, while providing greater flexibility, and therefore should be given priority @evalpoly( # 32753 ).
• pkgdir(ModuleName)Than is now provided a normally used dirname(dirname(pathof(ModuleName)))a simpler method to return the module (or submodule) package root directory. ( # 33128 )

The remaining large number of updates, see Update Description: https://github.com/JuliaLang/julia/blob/v1.4.0/NEWS.md