Vb1988: nur das letzte Vorkommen eines Strings entfernen

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statt:

var original = "user hashimoto has two dogs";
var pos = original.lastIndexOf("has");
var neu = original.substr(0,pos) + original.substr(pos+3);

muss es lauten:

var original = "user hashimoto has two dogs";
var pos = original.lastIndexOf("has"); 
var neu = original.substr(0,pos) + original.substr(pos+1);