FLEX Collection Array ArrayCollection operation instance

FLEX Collection Array ArrayCollection operation instance

<?xml version="1.0"encoding="Utf-8"?><!--Simple example to demonstrate the Halo DataGrid control. --><s:application xmlns:fx="http://ns.adobe.com/mxml/2009"xmlns:s="Library://ns.adobe.com/flex/spark"xmlns:mx="LIBRARY://NS.ADOBE.COM/FLEX/MX"> <fx:Script> <![cdata[Importmx.collections.ArrayCollection; //adding Objects                 Public functionInsertcollection ():void{                    //Method 1                    //a curly brace represents an object                    varSelecttype01:string ="Tokyo"; varSelecttype02:string ="Yokohama"; varOnearraycollection:arraycollection =NewArrayCollection ([{label:selecttype01, data:1}, {label:selecttype02, data:2}]); //Method 2                    vartwoarraycollection:arraycollection; varArray:array =NewArray ();  for(varI Number= 0; I < 10; i++) {array.unshift ({city:"B"+ I, DATA:I, size:1000 +i}); } twoarraycollection=NewArrayCollection (array);//The length is 10, which means there are 10 objects                                        //Method 3                    varThreearraycollection:arraycollection =Newarraycollection ();  for(varJ: Number= 0; J < 5; J + +) {//Add 5 ObjectsThreearraycollection.additem ({name:"C"+ J, Sequence:j, OK:"Hello"+J}); } Trace (threearraycollection[2].ok);//Hello2                                        //Method 4, add the object at the specified indexThreearraycollection.additemat ({name:"K", Sequence:"A"Ok:"H"},2); Trace (threearraycollection[2].ok);//H                                        //Method 5, add the object at the established indexThreearraycollection.setitemat ({name:"W", Sequence:"X"Ok:"Q"}, 5); Trace (threearraycollection[5].sequence);//X                }                                //Delete object, arraycollection equivalent Array (array collection)                 Public functionDeleteCollection ():void{                    varDelcollection:arraycollection =Newarraycollection ();  for(varJ: Number= 0; J < 5; J + +) {//Add 5 ObjectsDelcollection.additem ({name:"DEL"+ J, Sequence:j, OK:"Hello"+J}); }                     for(varValue:stringinchdelcollection)                    {Trace (Delcollection[value].ok); } Delcollection.removeitemat (2);//Delete the third element                     for(varValue2:stringinchdelcollection)                    {Trace (Delcollection[value2].ok);    } delcollection.removeall (); //Delete all                     for(varValue3:stringinchdelcollection) {Trace ("=========");                    Trace (Delcollection[value3].ok); }                }                                //Querying Objects                 Public functionSelectcollection ():void{                    vartwoarraycollection:arraycollection; varArray:array =NewArray ();  for(varI Number= 0; I < 10; i++) {array.unshift ({city:"B"+ I, DATA:I, size:1000 +i}); } twoarraycollection=NewArrayCollection (array);//if the ArrayCollection method has parameters, it must be an array object as a parameter.                    if(Twoarraycollection.contains (array[1])){                        varObjindex:int = Twoarraycollection.getitemindex (array[1]);//returns the index of the itemTrace (Objindex); }                    //Trace ("OK");                    //     }                }                                            ]]> </Fx:script> <mx:button id="Insertid"x=" the"Label="Add Object"click="Insertcollection ();" /> <mx:button id="Deleteid"x=" the"Label="Delete Object"click="DeleteCollection ();" /> <mx:button id="Seleteid"x=" the"Label="Query Object"click="Selectcollection ();" /> <fx:Declarations> <!--place non-visual elements (e.g., services, value objects) h Ere-</Fx:declarations> </S:application>

FLEX Collection Array ArrayCollection operation instance