this is surely not optimal withit works pretty fine :
var HashCounter = Class.create(Hash, {
initialize : function( $super ) {
$super( {} );
},
store: function(data) {
found = this.seek(data);
if( !found) {
newid = (this.keys().map(parseInt).max() || 0) + 1;
this.set(newid, $H( {id : newid, data: data, count: 1} ));
} else {
var id = found.get('id');
var newcount = 1 + found.get('count');
this.set(id, $H( {id: id, count: newcount, data: data} ));
}
},
seek: function(data) {
var pair = this.detect( function(entry) {
return data == entry[1].get('data');
});
return pair ? pair[1] : false;
},
toString : function() {
var text = "toString\n";
this.each( function(pair) {
text += pair.key + ' => '
+ pair.value.get('data') + ' ('
+ pair.value.get('count')
+ ')\n';
});
return text;
}
});
// -- USAGE
// var Tags = new HashCounter();
// Tags.store('abc');
// Tags.store('abc');
// Tags.store('def');
// -- displayed with Firebug console
// console.log(Tags.toString());
it is the first step for building javascript cloud tags parsing an
Ajax string like
ARTICLE1_TITLE
TAG1, TAG2, TAG3
ARTICLE2_TITLE
TAG4, TAG5, TAG1
ARTICLE3_TITLE
TAG6, TAG7, TAG2, TAG3
(a big list...)
the number I attemp to compute is the STRENGTH of the coupling between
all possible pair of tags :
e.g. given a pair of tags, find the number of articles sharing this
pair
for example
strength(TAG1, TAG7) = 0
strength(TAG2, TAG3) = 2 because of ARTICLE1 and ARTICLE3
strength(TAG1, TAG2) = 1 *
etc, for all pairs
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