comparisonvector-factory works

Author: velfundert

.gitignore

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+node_modules
+

css-simplify.js

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+var css = require('css'),
+		fs = require('fs'),
+		_ = require('underscore');
+
+var cumulativeComparisonVectorFactory = function() {
+
+	var dict = {}
+			dictlength = 0;
+	
+
+	return function (rule) {
+		var vector = Array.apply(null, Array(dictlength)).map(Number.prototype.valueOf,0);
+
+		console.log(dict.length);
+		_.each(rule.selectors, function(element){
+
+
+			if (dict[element]) {
+				vector[dict[element]] = 1;
+			}else {
+				dict[element] = dictlength++;
+				vector.push(1);
+			}
+		});
+
+		// look up rules in dictionary, add the ones that doesn't exist.
+		// ... while simultaneously building an array (the vector)
+		// return that vector:
+		console.log(vector);
+
+		return vector;
+	}
+};
+
+var vecfac = cumulativeComparisonVectorFactory();
+
+function  parseit(err, res) {
+	if (res != null) {
+		_.each(_.filter(css.parse(res).stylesheet.rules, function(x) { return x.type === 'rule';}), vecfac);
+	} else {
+		console.log(err);
+	}
+}
+
+fs.readFile('lol.css', 'utf8', parseit);
+
+
+var safeCosineSimilarity = function(a, b) {
+	var result = 0, denom = 0;
+	for (var i = 0; i < a.length && i < b.length; ++i ) {
+		result += a[i] * b[i];
+	}
+	var reducer = function(memo, value) { return memo + value*value; };
+	return result / (1+ sqrt( _.reduce(a, reducer, 0) * _.reduce(b, reducer, 0) ));
+};
+
+var findSimilarRules = function () {
+	// how can we save time and computations when doing the comparisons? can we?
+	// what are we really looking for, how do we find the most similar things?
+
+};

package.json

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+{
+  "name": "css-simplify",
+  "version": "0.0.1",
+  "description": "A utility script that tries to simplify a css by using cosine similarity",
+  "main": "css-simplify.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/velfundert/css-simplify.git"
+  },
+  "keywords": [
+    "css"
+  ],
+  "author": "Christian Strandenæs",
+  "license": "GPL-3.0",
+  "devDependencies": {
+    "css": "^2.2.1"
+  }
+}