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Posted By

vbert on 02/20/08


Tagged

javascript array hash associative


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vbert


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());


Plain TextExpand 
  1. var AssociativeArray = function() {
  2.  
  3. 	this.hash = new Array();
  4.  
  5. 	this.size = function() {
  6. 		var size = 0;
  7. 		for(var i in this.hash) {
  8. 			if(this.hash[i] != null) {
  9. 				size++;
  10. 			}
  11. 		}
  12. 		return size;
  13. 	};
  14.  
  15. 	this.clear = function() {
  16. 		this.hash = new Array();
  17. 	};
  18.  
  19. 	this.add = function(key, value) {
  20. 		if(key == null || value == null) {
  21. 			throw "NullPointerException { \"" + key + "\" : \"" + value + "\" }";
  22. 		}
  23. 		else {
  24. 			this.hash[key] = value;
  25. 		}
  26. 	};
  27.  
  28. 	this.get = function(key) {
  29. 		return this.hash[key];
  30. 	};
  31.  
  32. 	this.remove = function() {
  33. 		var value = this.hash[key];
  34. 		this.hash[key] = null;
  35. 		return value;
  36. 	};
  37.  
  38. 	this.contains_key = function() {
  39. 		var exist = false;
  40. 		for(var i in this.hash) {
  41. 			if(i == key && this.hash[i] != null) {
  42. 				exist = true;
  43. 				break;
  44. 			}
  45. 		}
  46. 		return exist;
  47. 	};
  48.  
  49. 	this.contains_value = function(value) {
  50. 		var contains = false;
  51. 		if(value != null) {
  52. 			for(var i in this.hash) {
  53. 				if(this.hash[i] == value) {
  54. 					contains = true;
  55. 					break;
  56. 				}
  57. 			}
  58. 		}
  59. 		return contains;
  60. 	};
  61.  
  62. 	this.is_empty = function() {
  63. 		return (parseInt(this.size()) == 0) ? true : false;
  64. 	};
  65.  
  66. 	this.keys = function() {
  67. 		var keys = new Array();
  68. 		for(var i in this.hash) {
  69. 			if(this.hash[i] != null) {
  70. 				keys.push(i);
  71. 			}
  72. 		}
  73. 		return keys;
  74. 	};
  75.  
  76. 	this.values = function() {
  77. 		var values = new Array();
  78. 		for(var i in this.hash) {
  79. 			if(this.hash[i] != null) {
  80. 				values.push(this.hash[i]);
  81. 			}
  82. 		}
  83. 		return values;
  84. 	};
  85.  
  86. 	this.to_string = function() {
  87. 		var string = "{\"array\": [\n";
  88. 		for(var i in this.hash) {
  89. 			if(this.hash[i] != null) {
  90. 				string += "\t{ \"" + i + "\" : \"" + this.hash[i] + "\" },\n";
  91. 			}
  92. 		}
  93. 		return string += "]}";
  94. 	};
  95. }

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