comment on

I think that Version (2) and (1) do exactly the same thing.
Version 2 is easier to understand. And I think that it is as least as fast if not faster. If we are benchmarking things, then we need to to "apples to apples".

#!/usr/bin/perl -w
use strict;
use Data::Dumper;

## version 1....
my $num =0;
my %h = map{$_, $num++}('A'..'Z','a'..'z'); 
print Dumper \%h;

## version 2...
my %hash;
foreach my $letter (('A'..'Z','a'..'z'))
{
   $hash{$letter}++;
}
print Dumper \%hash;

foreach (sort keys %h)
{
   print "$_ OK\n" if $hash{$_};
}
[download]

$VAR1 = {
          'S' => 18,
          'a' => 26,
          'T' => 19,
          'N' => 13,
          'K' => 10,
          'd' => 29,
          'Y' => 24,
          'E' => 4,
          'j' => 35,
          'y' => 50,
          'Z' => 25,
          'u' => 46,
          'k' => 36,
          'g' => 32,
          't' => 45,
          'e' => 30,
          'J' => 9,
          'W' => 22,
          'v' => 47,
          's' => 44,
          'B' => 1,
          'H' => 7,
          'c' => 28,
          'q' => 42,
          'b' => 27,
          'D' => 3,
          'I' => 8,
          'G' => 6,
          'z' => 51,
          'U' => 20,
          'w' => 48,
          'F' => 5,
          'r' => 43,
          'x' => 49,
          'V' => 21,
          'Q' => 16,
          'h' => 33,
          'M' => 12,
          'C' => 2,
          'L' => 11,
          'f' => 31,
          'i' => 34,
          'A' => 0,
          'n' => 39,
          'O' => 14,
          'X' => 23,
          'P' => 15,
          'm' => 38,
          'l' => 37,
          'p' => 41,
          'R' => 17,
          'o' => 40
        };
$VAR1 = {
          'S' => 18,
          'a' => 26,
          'T' => 19,
          'N' => 13,
          'K' => 10,
          'd' => 29,
          'Y' => 24,
          'E' => 4,
          'j' => 35,
          'y' => 50,
          'Z' => 25,
          'u' => 46,
          'k' => 36,
          'g' => 32,
          't' => 45,
          'e' => 30,
          'J' => 9,
          'W' => 22,
          'v' => 47,
          's' => 44,
          'B' => 1,
          'H' => 7,
          'c' => 28,
          'q' => 42,
          'b' => 27,
          'D' => 3,
          'I' => 8,
          'G' => 6,
          'z' => 51,
          'U' => 20,
          'w' => 48,
          'F' => 5,
          'r' => 43,
          'x' => 49,
          'V' => 21,
          'Q' => 16,
          'h' => 33,
          'M' => 12,
          'C' => 2,
          'L' => 11,
          'f' => 31,
          'i' => 34,
          'A' => 0,
          'n' => 39,
          'O' => 14,
          'X' => 23,
          'P' => 15,
          'm' => 38,
          'l' => 37,
          'p' => 41,
          'R' => 17,
          'o' => 40
        };
A OK
B OK
C OK
D OK
E OK
F OK
G OK
H OK
I OK
J OK
K OK
L OK
M OK
N OK
O OK
P OK
Q OK
R OK
S OK
T OK
U OK
V OK
W OK
X OK
Y OK
Z OK
a OK
b OK
c OK
d OK
e OK
f OK
g OK
h OK
i OK
j OK
k OK
l OK
m OK
n OK
o OK
p OK
q OK
r OK
s OK
t OK
u OK
v OK
w OK
x OK
y OK
z OK

Process completed successfully
[download]

In reply to Re: Efficiency of map vs. more verbose basic/fundamental code by Marshall
in thread Efficiency of map vs. more verbose basic/fundamental code by marquezc329

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