Life With Perl
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![Page 1: Life With Perl](https://reader034.fdocuments.us/reader034/viewer/2022051108/546ceac3af795953298b508e/html5/thumbnails/1.jpg)
Life with Perl
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Life with Perlboth 5 and 6
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Life with Perlboth 5 and 6
5 stands for both 5.8.8 and 5.10
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Versions of Perl (perlhist)
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Lyrical digression
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Time measuring
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5.000 17 October 1994
5.6.0 22 March 2000
5.8.0 18 July 20025.8.8 31 January 2006
5.10 18 December 2008
Versions of Perl (perlhist)
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5.000 17 October 1994
5.6.0 22 March 2000
5.8.0 18 July 20025.8.8 31 January 2006
5.10 18 December 2008
6.0 ?
Versions of Perl (perlhist)
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5.000 17 October 1994
5.6.0 22 March 2000
5.8.0 18 July 20025.8.8 31 January 2006
5.10 18 December 2008
6.0 Сhristmas
Versions of Perl (perlhist)
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5.000 17 October 1994
5.6.0 22 March 2000
5.8.0 18 July 20025.8.8 31 January 2006
5.10 18 December 2008
6.0 2000
Versions of Perl (perlhist)
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Perl 6 docs, specs, thoughts
RFCsApocalypsesExegesesSynopses
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5 != 6
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Lyrical digression
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Perl 5 mess
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Perl 6 clean-up
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5 != 64 != 5
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Programme (script?)
Compiler
Virtual machine (VM)
Byte-code
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Programme (script?)
Compiler
Virtual machine (VM)
Byte-code
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BasicForthJakoLispm4OokPerl 6Perl 5PythonRubySchemeTcl
PASM
IMC
PBC
PIR
PIL
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C#J#VB.NETJScript.NETmanaged C++
Ada (A#)F#COBOL.NETFORTRAN.NETPerl.NET
CLR
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Java
JRE
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Most practical compilers
languages/perl6 in parrot.tar.gz
Perl6::* on CPAN
PUGS
Rakudo
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Most practical compilers
Rakudo
= = parrot/langauges/perl6
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Most practical compilers
Rakudo
= = parrot/langauges/perl6 + years
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PUGS. Made with Haskell
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PUGS. Made with Haskell
Most full coverage of Perl 6 specs
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PUGS. Made with Haskell
Most full coverage of Perl 6 specs
Needs latest version of GHC
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It is not lyrics
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PUGS. Made with Haskell
Most full coverage of Perl 6 specs
Needs latest version of GHC
Slow
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PUGS. Made with Haskell
Most full coverage of Perl 6 specs
Needs latest version of GHC
Slow
Contains tests
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Perl 6
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perl.it
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perl.it!
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UTF-8
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say and print
say"俄罗斯新闻网";
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say and print
say"俄罗斯新闻网";
"俄罗斯新闻网".say;
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say and print
say"俄罗斯新闻网";
"俄罗斯新闻网".say;
"俄罗斯新闻网".say();
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say and print
say"string";
say123;
say(12+45);
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say and print
say"string";
say123;
say(12+45);
"string".say;
123.say;
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say and print
say"string";
say123;
say(12+45);
"string".say;
123.say;
3.14.say;
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String length
my$str="俄罗斯新闻网";
say$str.length;
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String length
my$str="俄罗斯新闻网";
say$str.length;
say$str.chars;6say$str.bytes;18
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String concatenation
my$string_a="abcde";
my$string_b="fghij";
print$string_a.$string_b;5
print$string_a~$string_b;6
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Lyrical digression
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Different wishes
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Different wishes
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Variables
my$string="abcde";
my@array=(10,20,30);
my%hash=("one"=>10,"two"=>20);
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Variables
my$string="abcde";
my@array=(10,20,30);
my%hash=("one"=>10,"two"=>20);
print$string;
print$string;
5
6
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Variables
my$string="abcde";
my@array=(10,20,30);
my%hash=("one"=>10,"two"=>20);
5
6
print$array[1];
print@array[1];
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Variables
my$string="abcde";
my@array=(10,20,30);
my%hash=("one"=>10,"two"=>20);
5
6
print$hash{"one"};
print%hash{"one"};
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Variables
my$string="abcde";
my@array=(10,20,30);
my%hash=("one"=>10,"two"=>20);
5
6
print$hash{"one"};
print%hash{"one"};print%hash<one>;
print%hash<onetwo>;
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Contexts
my@array=(5..10);
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Contexts
my@array=(5..10);
say~@array; 5 6 7 8 9 10
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Contexts
my@array=(5..10);
say~@array; 5 6 7 8 9 10
say+@array;6
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Contexts
my@array=(5..10);
say~@array; 5 6 7 8 9 10
sayint@array;6
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Contexts
my@array=(5..10);
say~@array; 5 6 7 8 9 10
sayint@array;6
say~hash@array;5678910
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Contexts
my$value=100;
say$value;100
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Contexts
my$value=100;
say$value;100
say?$value;1
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Subroutines
subcallme($first,$second){say"$first,$second";}
callme(10,20);
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Subroutines
subcallme($first,$second){say"$first,$second";}
callme(10,20);callme10,20;
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Subroutines
subcallme($first,$second){say"$first,$second";}
callme(10,20);callme10,20;callme(10,20);
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Subroutines
subcallme($first,$second){say"$first,$second";}
callme(10,20);callme10,20;callme(10,20);callme(second=>20,first=>10);
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Subroutines
subcallme(@a,@b){say@a~","~@b;}
my@odd=(1,3);my@even=(2,4);callme@odd,@even;13,24
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Subroutinessubcallme($argisrw)
subinc($value,$step=1)
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Anonymous subroutines
my$print_line_break={print"<br/>";}
$print_line_break();
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Anonymous subroutines
my$square=‐>($value){$value**2;}
say$square(20);400
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Anonymous subroutines
my$square=‐>($value){$value**2;}
say$square(20);400say$square20;
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Cycles
for@list{say$_;}
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Cycles
for@list‐>$value{say$value;}
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Cycles
for@list‐>$value{say$value;}
for@list,sub($value){say$value;}
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Hyperoperators
my@odd=(1,3,5);my@even=(2,4,6);
my@sum=@odd»+«@even;say~@sum;3711
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Hyperoperators
my@odd=(1,3,5);my@even=(2,4,6);
my@sum=@odd»+«@even;say~@sum;
my@next=@sum»+«1;say~@next;
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Hyperoperators
my@odd=(1,3,5);my@even=(2,4,6);
my@sum=@odd>>+<<@even;say~@sum;
my@next=@sum>>+<<1;say~@next;
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Hyperoperator monument
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Junctions
say"yes"if20==10|20|30;
say"yes"if20==any(10,20,30);
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Junctions
say"yes"if20==10|20|30;
say"yes"if20==any(10,20,30);
say"no"if21==none(10,20,30);
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multi functions
multisubthe_name($scalar){...}multisubthe_name($s1,$s2){...}multisubthe_name(@array){...}
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multi functions
multisubthe_name($scalar){...}multisubthe_name($s1,$s2){...}multisubthe_name(@array){...}
the_name($some_value);the_name($value1,$value2);the_name(@some_array);
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Overriding operators
multiinfix:<+>($a,$b){return$a‐$b;}
say10+20;‐10
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Overriding operators
multipostfix:<@>($power){return2**$power;}
say8@;256
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Overriding operators
subpostfix:<power_of_two>($power){return2**$power;}
say8power_of_two;256
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switch and case
given($x){when"a"{say...}when"b"{say...}when/<[a‐z]>/{...}default{...}}
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Smart matching
~~
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Smart matching
$a~~$b==
$b~~$a
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Smart matching
my$b;
$b~~undef
!defined$b
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Smart matching
my$c='abc';
$c~~'abc'
$ceq'abc'
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Smart matching
my@a=(1..3);my@b=(1..3);
@a~~@b
1==1&&2==2&&3==3
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Smart matching
my@f=('a'..'f');
@f~~'d'
grep{$_eq'd'}@f
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Smart matching
my%h=(a=>'alpha',b=>'beta');
%h~~'a'
exists$h{'a'}
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Smart matchingmy%h=(a=>'alpha',b=>'beta');my%hh=(b=>1,a=>2);
%h~~%hh[sortkeys%h]~~[sortkeys%hh]
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Smart matching
Works
in Perl 5.10!
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People think of Perl 6
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I think of today's Perl 6
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Classes
classAlphabet{}
my$abc=newAlphabet;
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Classes
classAlphabet{has$.Name;has$Length;}
my$abc=newAlphabet;$abc.Name="Latin";$abc.Length=26;
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Classes
classAlphabet{...methodinfo{say"$.Name;$Length";}}
$abc.info();
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Classes
classAlphabet{methodBUILD{...}methodDESTROY{...}}
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Inheritance
classCharactersisAlphabet{}
my$chars=newCharacters;$chars.info();
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Inheritance
classCharactersisAlphabetisUniqueisNonLatin{}
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Roles (interfaces?)
roleHaveName{has$Name;methodGetName{return$.Name;}}
classNamedAbcdoesHaveName{}
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June 2003
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June 2004
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June 2004 2005
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2005
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2007?
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2008?
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Cancelled
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Perl 6in
Perl 5.10
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usefeatureqw(sayswitchstate);
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subf{state$c;say++$c;}f();f();f();
123
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//
defined-or
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my$c=0;my$d=$c//3;say$d;0
my$e=0;my$f=$e||4;say$f;4
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The Way Of The Camel
Rakudа-do
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Rakudo
cdlanguages/perl6/makeperl6
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Binding
my$hour=14;my$summertime:=$hour;
say$hour;$summertime++;
say$hour;
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.WHATclassLanguage{has$!Name;
methodgive_name($newname){$!Name=$newname;}
methodsay_name{say"Thisis$!Name";}}
my$lang=Language.new();$lang.give_name('Perl6');$lang.say_name();
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.WHATclassLanguage{}
my$lang=Language.new();
say$lang.WHAT;
sayLanguage.WHAT;
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say'before';try{die'Bye!';}say'after';
try
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regexlanguage{Perl|XML};
say"ok"
if'Perl'~~/<language>/;
say"notok"
unless'PHP'~~/<language>/;
Regexes
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More
classFoo{};
myFoo$x;
$x=Foo.new();
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More
async{
my@sum=@odd>>+<<@even;
}
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More
atomic{
$a‐=100;
$b+=100;
}
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