search in a textFiedl, a specific word - actionscript-3

Question

I've got, in my AS3 code, a textfield that load sentences from a database (each sentences is a title.
How can I simply do a search bar for this TextField. When the user type the word "computer" (for exemple), it'll search in every sentences the word "computer".
Here's my current code :
function createListItem(index:int, item:Object):void {
var listItem:TextField = new TextField();
var myFormat:TextFormat = new TextFormat();
myFormat.size = 25
myFormat.color = 0x000000;
myFormat.font = "Mohave";
listItem.defaultTextFormat = myFormat;
listItem.text = item.title;
listItem.x = 10;
listItem.y = 140+ index * 40;
listItem.width = 160;
feedbackText.text = "createListItem" +item.title;
listItem.addEventListener(MouseEvent.CLICK, function(e:MouseEvent):void {
showDetails(item);
});
list.addChild(listItem);
}
and it displays a list like this:
"I sell a computer"
"I sell a desk"
"computer and apple"
(and know if I can do a search bar in order to display only the sentences with a specific word).
Thx for your help,

Answer 1

First convert your list into an array
var str: String = "first sentence. second sentence. third sentence. fourth sentence";
var arr: Array = str.split(".");/// to split the string into array items
function searching(val: String): String {
var collectedString: String = "";
for (var i: int = 0; i < arr.length; i++) {
if (arr[i].search(val) > -1) {
collectedString += arr[i].toString()+".";
}
}
return collectedString;
}
trace(searching("second")); /// input the key word
trace( searching("sentence")); /// another the key word