JavaScript Implementation Map

1 functionMap () {2      This. elements =NewArray ();3 4     //get the number of map elements5      This. Size =function() {6         return  This. elements.length;7     }8 9     //determine if the map is emptyTen      This. IsEmpty =function() { One         return( This. elements.length < 1); A     } -  -     //Delete all elements of map the      This. Clear =function() { -          This. elements =NewArray (); -     } -  +     //add a unique element to the map (key, value) -      This. put =function(_key, _value) { +          This. Remove (_key); A          This. Elements.push ({ at key: _key, - Value: _value -                 }); -     } -  -     //add duplicate elements to map (key, value) in      This. Putrepeat =function(_key, _value) { -          This. Elements.push ({ to key: _key, + Value: _value -                 }); the     } *  $     //deletes the element of the specified key, returns true successfully, and fails to return falsePanax Notoginseng      This. remove =function(_key) { -         varbln =false; the         Try { +              for(i = 0; i < This. elements.length; i++) { A                 if( This. Elements[i].key = =_key) { the                      This. Elements.splice (I, 1); +                     return true; -                 } $             } $}Catch(e) { -bln =false; -         } the         returnbln; -     }Wuyi  the     //gets the element value of the specified key, and the failure returns null -      This. get =function(_key) { Wu         Try { -             varresult =NULL; About              for(i = 0; i < This. elements.length; i++) { $                 if( This. Elements[i].key = =_key) { -result = This. Elements[i].value; -                 } -             } A             returnresult; +}Catch(e) { the             return NULL; -         } $     } the  the     //sets the value of the specified key element in the map, and fails to return null the      This. Set =function(_key, _value) { the         Try { -              This. Remove (_key); in              This. Put (_key, _value); the}Catch(e) { the             return NULL; About         } the     } the  the     //gets the element of the specified index (using Element.key,element.value to get the key and value), and fails to return null +      This. Element =function(_index) { -         if(_index < 0 | | _index >= This. Elements.length) { the             return NULL;Bayi         } the         return  This. Elements[_index]; the     } -  -     //determine if the map contains an element of the specified key the      This. ContainsKey =function(_key) { the         varbln =false; the         Try { the              for(i = 0; i < This. elements.length; i++) { -                 if( This. Elements[i].key = =_key) { thebln =true; the                 } the             }94}Catch(e) { thebln =false; the         } the         returnbln;98     } About  -     //Determines whether the map contains an element of the specified value101      This. Containsvalue =function(_value) {102         varbln =false;103         Try {104              for(i = 0; i < This. elements.length; i++) { the                 if( This. Elements[i].value = =_value) {106bln =true;107                 }108             }109}Catch(e) { thebln =false;111         } the         returnbln;113     } the  the     //get an array of all the value in the map (array) the      This. Values =function() {117         vararr =NewArray ();118          for(i = 0; i < This. elements.length; i++) {119Arr.push ( This. Elements[i].value); -         }121         returnarr;122     }123 124     //gets an array of all keys in the map (array) the      This. Keys =function() {126         vararr =NewArray ();127          for(i = 0; i < This. elements.length; i++) { -Arr.push ( This. Elements[i].key);129         } the         returnarr;131     } the}

JavaScript Implementation Map