Posted By

vbert on 02/20/08

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Last Edited at 02/20/08 08:30pm

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Associative Array - advance

/ Published in: JavaScript

/* ---===[ EXAMPLE ]===--- */

var TT = new AssociativeArray();

TT.add("k-1", "Value 1");
TT.add("k-2", "Value 2");
TT.add("k-3", "Value 3");
TT.add("k-4", "Value 4");

alert(TT.to_string());

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var AssociativeArray = function() {

this.hash = new Array();

this.size = function() {
		var size = 0;
		for(var i in this.hash) {
			if(this.hash[i] != null) {
				size++;
			}
		}
		return size;
	};

this.clear = function() {
		this.hash = new Array();
	};

this.add = function(key, value) {
		if(key == null || value == null) {
			throw "NullPointerException { \"" + key + "\" : \"" + value + "\" }";
		}
		else {
			this.hash[key] = value;
		}
	};

this.get = function(key) {
		return this.hash[key];
	};

this.remove = function() {
		var value = this.hash[key];
		this.hash[key] = null;
		return value;
	};
	
	this.contains_key = function(key) {
		var exist = false;
		for(var i in this.hash) {
			if(i == key && this.hash[i] != null) {
				exist = true;
				break;
			}
		}
		return exist;
	};

this.contains_value = function(value) {
		var contains = false;
		if(value != null) {
			for(var i in this.hash) {
				if(this.hash[i] == value) {
					contains = true;
					break;
				}
			}
		}
		return contains;
	};

this.is_empty = function() {
		return (parseInt(this.size()) == 0) ? true : false;
	};
	
	this.keys = function() {
		var keys = new Array();
		for(var i in this.hash) {
			if(this.hash[i] != null) {
				keys.push(i);
			}
		}
		return keys;
	};

this.values = function() {
		var values = new Array();
		for(var i in this.hash) {
			if(this.hash[i] != null) {
				values.push(this.hash[i]);
			}
		}
		return values;
	};

this.to_string = function() {
		var string = "{\"array\": [\n";
		for(var i in this.hash) {
			if(this.hash[i] != null) {
				string += "\t{ \"" + i + "\" : \"" + this.hash[i] + "\" },\n";
			}
		}
		return string += "]}";
	};
}

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