PerlとJSの比較 (配列、ハッシュ)

@goods = qw/pen pencil/; 
pop(@goods); # @goods becomes (pen) 
push(@goods, 'brush'); # @goods becomes (pen, brush) 

pop @goods; # @goods becomes pen 
push @goods, 'brush'; # @goods becomes (pen, brush) 

@goods = qw/pen pencil/; 
 
# Assign an array variable to a scalar variable 
$len = @goods; 
 
# Use the scalar function 
$len = scalar(@goods); 
 
# Add 1 to the index of the last element 
$len = $#goods + 1; 

@goods = qw/pen pencil brush/; 
 
# default $_ 
foreach (@goods) { 
 print "$_". "\n"; 
} 
 
# Custom variables 
foreach $item (@goods) { 
 print "$item". "\n"; 
} 

['pen', 'pencil', 'brush'].forEach(function(item) { 
  console.log(item) 
}) 

%person = ( 
 name => 'Jack', 
 age => 30, 
); 
@k = keys %person; # (name, age) 
@v = values $person; # ('Jack', 30) 

person = { 
 name: 'Jack', 
 age: 30 
} 
Object.keys(person) // ['name', 'age'] 

%person = ( 
 name => 'Jack', 
 age => 30, 
); 
$len = keys %person; # 2 

function getObjLen(obj) { 
  var len = 0 
  for (var a in obj) { 
    if (obj.hasOwnProperty(a)) 
    len++ 
  } 
  return len 
} 
 
var person = { 
  name: 'Jack', 
  age: 30 
} 
getObjLen(person) // 2

%person = ( 
 name => 'Jack', 
 age => 30, 
); 
 
# way 1 
while ( ($k, $v) = each %person ) { 
 print "$k: $v". "\n"; 
} 
 
# way2 
@keys = keys %person; 
foreach(@keys) { 
 print "$_: ". $person{$_}. "\n"; 
} 

%person = ( 
 name => 'Jack', 
 age => 30, 
); 
if (exists $person{ndame}) { 
 print 'yes'; 
} else { 
 print 'no'; 
} 

%person = ( 
 name => 'Jack', 
 age => 30, 
); 
delete $person{'name'}; 

%person = ( 
 name => 'Jack', 
 age => 30, 
); 
@arr = %person; # convert hash to array becomes ('name', 'Jack', 'age', 30) 

@nums = qw/zero 0 one 1 two 2/; 
%hash = @nums; 
while( ($k, $v) = each %hash ) { 
 print "$k: $v\n"; 
}