Re: Hash element exists/delete

Dr. Manhattan:

While there are a few interesting topics, no-one has mentioned that the easiest way to remove the upper-case characters is not to have any in the first place:

my %H;
while (<>) {
   my @words = map { lc }       # map all words to lower case
               split /\s+/, $_; # break $_ into a list of words
   $H{$_}++ for @words;         # add words to hash
}
[download]

If you needed the upper-case versions at some point, then this may not be useful. But people frequently miss the opportunity to clean up the data before storing it, so I thought I'd mention it, just in case.

...roboticus

When your only tool is a hammer, all problems look like your thumb.

Comment on Re: Hash element exists/delete Download Code

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Re^2: Hash element exists/delete by tmharish (Friar) on Jan 22, 2013 at 11:16 UTC
Update: roboticus, You have assumed that the input is a list of words but it is of the format: `Word Frequency Word Frequency Word Frequency Word Frequency` [download] Given this, the code should probably be: `my %H; while (<>) { my ( $word, $freq ) = split /\s+/, $_; $word = lc( $word ) ; $H{ $word } += $freq ; }` [download] Although that does not change your primary thesis: people frequently miss the opportunity to clean up the data before storing it The way to achieve this with minimum changes to your code is in my original response: Original Response: I think you meant: `$H{ $words[0] } += $words[1] ;` [download]	[reply] [d/l] [select]
Re^3: Hash element exists/delete by roboticus (Chancellor) on Jan 22, 2013 at 12:56 UTC
tmharish: Yes, I was making an assumption about the input. For your input format, your code looks appropriate. ...roboticus When your only tool is a hammer, all problems look like your thumb.	[reply]


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