Object initialization problem

Hi
Say I have a Hash, and an instance called wordcount, that maps strings
to a number count, that counts the occurance of the word.

I do

count = Hash.new
count[word]++ if count[word]
count[word]=1 unless count[word]

everytime! Is there a simple way to do it?

Thanks :slight_smile:
Vimal

Hi –

On Mon, 25 Sep 2006, Vimal wrote:

Hi
Say I have a Hash, and an instance called wordcount, that maps strings
to a number count, that counts the occurance of the word.

I do

count = Hash.new
count[word]++ if count[word]

Not in Ruby you don’t :slight_smile:

count[word]=1 unless count[word]

everytime! Is there a simple way to do it?

You could do:

count = Hash.new(0) # default to 0
count[word] += 1 # each time through loop

David

class Hash
def increment_word_count(key)
self[key] ||= 1
self[key] += 1
end
end

count = Hash.new
count.increment_word_count(word)

Of course, if you can think of a better method name, but this will help
with
DRYness.

Jason

Doh! I’m getting caught up in the cooler features of Ruby and forgetting
the
simple stuff. David’s got it right.

Jason

Hi –

On Mon, 25 Sep 2006, Jason R. wrote:

Of course, if you can think of a better method name, but this will help with
DRYness.

There’s also DRR (Don’t Repeat Ruby :slight_smile: Hashes are already good at
this stuff (see my previous response).

David

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