PERL6 revolutionary reform relative to PERL5

July 19, 2000, in a boring and dreary political organization meeting, Jon Orwant stood aside for a few minutes, then calmly went to the coffee table, picked up a cup and threw it across the wall, and said, "We have to find a way to motivate the community, or it's over, we're getting bored, To do something else. I don't care what you do, but you have to do something big. And then he turned around and walked, and this incident triggered the flames of Perl6 's birth. After 10 years of sharpening, July 29, 2010, PERL6 's first implementation version of Rakudo Star finally released, the once burdened camel on the road.

PERL5 is a C-write core, although already very mature, but the core code is too large, full of various difficult to understand the call, and multithreading, Unicode support is not good, Perl6 relatively Perl5 made a revolutionary change, in addition to the more perfect support thread, Unicode, Reliable signal control has been added at the start of the design, the new kernel is smaller, faster, and the external extension API is clearer, and in the past binary compatibility issues have been completely resolved.

START

Install PERL6, you can download http://rakudo.org/how-to-get-rakudo/from the following URL, installation steps are as follows:

Install Perl6

Parameter –gen-parrot is actually a call to SVN or git to generate the appropriate parrot to compile it, parrot is Perl6 Perl6 in the related proposal, which means that Perl programs will be executed on Machine, The program is faced with a common cross-platform Virtual Machine environment, regardless of the OS environment you are facing, just like the VMs used by Java,. NET. Parameter-gen-nqp will download a copy of the NQP,NQP is a small Perl6 compiler used to build Rakudo,rakudo is used to Parrot the compiler on the virtual machine.

After installation, go to the installation directory and run./PERL6, when you see the >, you enter the Rakudo environment, you can perform something to see Rakudo response, such as:

Run Perl6

And in Perl5, running./perl directly in the current state, will not enter the user interaction state.

Variables and types

Array

PERL6 arrays and hashes are defined without parentheses, such as:

Array definition in PERL6

Output：

Here, the dour function is a newly introduced function in Perl6, which is to print one line of text to the terminal.

Hash

Access to the hash value in Perl6, if the key value is in double quotation marks, the {} is required, and if the double quotes are not used, the <> is required;

Hash definition in Perl6

Output：

If you do not use the => symbol to define the hash, you can also use the alternate Word method, as follows:

The method of auxiliary words

The Perl6 method provides a numerical name, which is used not only in hash but in many places.