analyze-css/lib/collection.js

/**
 * Push items and count them
 */
'use strict';

function collection() {
	this.items = {};
}

collection.prototype = {
	push: function(item) {
		if (typeof this.items[item] === 'undefined') {
			this.items[item] = {
				cnt: 1
			};
		} else {
			this.items[item].cnt++;
		}
	},

	sort: function() {
		var newItems = {},
			sortedKeys;

		// sort in descending order (by cnt)
		sortedKeys = Object.keys(this.items).sort((function(a, b) {
			return this.items[b].cnt - this.items[a].cnt;
		}).bind(this));

		// build new items dictionary
		sortedKeys.forEach(function(key) {
			newItems[key] = this.items[key];
		}, this);

		this.items = newItems;
		return this;
	},

	forEach: function(callback) {
		Object.keys(this.items).forEach(function(key) {
			callback(key, this.items[key].cnt);
		}, this);
	}
};

module.exports = collection;