checking the matches

tweetymonk has asked for the wisdom of the Perl Monks concerning the following question:

hii monks... i have 2 different arrays like this :

@array1=('146.234','15.11','78.3','890',3423.23);
@array2=('15.11#abc','890#def','78.3#ghi');
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What i want to do is, 1)split the second array (@array2)as numbers and text. 2)compare the numbers with the elements of the 1st array (@array1). 3)which ever number matches, only its corresponding text and number should be displayd.

so, the result should look like, in an array,

abc = 15.11,
def = 890,
ghi = 78.3
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Re: checking the matches by moritz (Cardinal) on May 22, 2008 at 09:30 UTC
What did you try so far? It's not really complicated, but you won't learn anything unless you try it yourself. And that's what perlmonks is good for: help you learning, not writing your code. Two small hints: take a look at split, and consider storing one of your arrays in a hash.	[reply]
Re: checking the matches by ikegami (Patriarch) on May 22, 2008 at 09:32 UTC
`my %hash = map { split /#/ } @array2; for (@array1) { next if !exists($hash{$_}); print("$hash{$_} = $_\n"); }` [download]	[reply] [d/l]
Re^2: checking the matches by psini (Deacon) on May 22, 2008 at 10:03 UTC
Good, if you're sure that @array1 has no duplicated value. Rule One: Do not act incautiously when confronting a little bald wrinkly smiling man.	[reply]
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Re: checking the matches by mwah (Hermit) on May 22, 2008 at 09:58 UTC
Ikegami already provided a very compact solution using a hash. A more explicit (looped) variant would read like: `... for my $element (@array2) { my ($num, $txt) = split /#/, $element; # extract parts print "$txt = $num\n" if grep $num eq $_, @array1 # use text compa +rison and print txt part } ...` [download] Regards mwa	[reply] [d/l]
Re^2: checking the matches by tweetymonk (Initiate) on May 22, 2008 at 10:47 UTC
This is working absolutely fine, but is it possible to match only the numbers before the decimal point???	[reply]
Re^3: checking the matches by mwah (Hermit) on May 22, 2008 at 10:54 UTC
Whats meant by "match the numbers before the decimal point"? One way could involve to 'int-ify' all comparisons: `... for my $element (@array2) { my ($num, $txt) = split /#/, $element; # extract parts print "$txt = ". int($num) ."\n" if grep int($num) eq int($_), @array1 # use text comparison and + print txt part } ...` [download] But I'm not entirely sure what you are trying to do. Regards mwa	[reply] [d/l]
Re: checking the matches by poolpi (Hermit) on May 22, 2008 at 10:54 UTC
Efficently? Not sure ;) `my %h = map{ reverse /(\d+).*#(.+)/ } grep "@array1", @array2; print Dumper \%h;` [download] `Output: $VAR1 = { 'def' => '890', 'abc' => '15', 'ghi' => '78' };` [download] hth, PooLpi 'Ebry haffa hoe hab im tik a bush'. Jamaican proverb	[reply] [d/l] [select]


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