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How do you test for substrings in Actionscript?

Posted on 2008-06-25
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Last Modified: 2013-11-11
Using pseudocode now, I want the following:

var1 = "foobar"

If (var1 contains "foo") {
    result = True;
}else{
    result =  False;
}


I dont know where "foo" will appear in my test variable var1, so not looking for

substring(start:Number, end:Number) : String

unless there's another way to implement this.
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Question by:kharndog
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3 Comments
 
LVL 42

Accepted Solution

by:
Rob Jurd, EE MVE earned 500 total points
ID: 21863916
what about indexOf?


var searchString:String = "Lorem ipsum dolor sit amet.";

var index:Number;
 

index = searchString.indexOf("L");

trace(index); // output: 0
 

index = searchString.indexOf("l");

trace(index); // output: 14
 

index = searchString.indexOf("i");

trace(index); // output: 6
 

index = searchString.indexOf("ipsum");

trace(index); // output: 6
 

index = searchString.indexOf("i", 7);

trace(index); // output: 19
 

index = searchString.indexOf("z");

trace(index); // output: -1

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LVL 42

Expert Comment

by:Rob Jurd, EE MVE
ID: 21863929
so to use your example
var var1:String = "foobar"

var result:Boolean = false;
 

result = (var1.indexOf("foo") >= 0);

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LVL 34

Expert Comment

by:Aneesh Chopra
ID: 21864059
as tagit mentioned:
actionscript uses "indexOf()" method of string in place of "contains"


below is the exact conversion of your code from  pseudocode to actionscript:

var1 = "foobar";
If (var1.indexOf("foo")!=-1) {
    result = True;
}else{
    result =  False;
}

if returned value is equal to -1, that's mean substring does not exist in main string.
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