Microsoft® JScript® Exists Method |
Scripting Run-Time Reference Version 2 |
Returns true if a specified key exists in the Dictionary object, false if it does not.
object.Exists(key)The Exists method syntax has these parts:
Part Description object Required. Always the name of a Dictionary object. key Required. Key value being searched for in the Dictionary object. The following example illustrates the use of the Exists method:
function keyExists(k) { var fso, s = ""; d = new ActiveXObject("Scripting.Dictionary"); d.Add("a", "Athens"); d.Add("b", "Belgrade"); d.Add("c", "Cairo"); if (d.Exists(k)) s += "Specified key exists."; else s += "Specified key doesn't exist."; return(s); }