Apex Code Development You need to sign in to do that
Don't have an account?
Remove items from List A if they appear in List B
Trying to be a good coder and using lists instead of loops but now I want to remove items from a List but I don't know the index of said items.
List<Contact>myRecipients = [SELECT id, firstname, lastname, email FROM contact WHERE firstname='Tim'];
List<Task> myTasks=[SELECT id, whoid, subject FROM task WHERE createddate >:dtRange];
I need to determine if the whoid in myTasks exists in myRecipients and if so, myRecipients.remove(x);
Do I need to loop through myRecipients in reverse order and then for each iteration loop through myTasks or is there a better way?
for(Integer c=myRecipients.size()-1; c>=0; --c){
for(Task t:myTasks){
if(myRecipients.get(c).id == t.whoid){
myRecipients.remove(c);
}
}
}
List<Contact>myRecipients = [SELECT id, firstname, lastname, email FROM contact WHERE firstname='Tim'];
List<Task> myTasks=[SELECT id, whoid, subject FROM task WHERE createddate >:dtRange];
I need to determine if the whoid in myTasks exists in myRecipients and if so, myRecipients.remove(x);
Do I need to loop through myRecipients in reverse order and then for each iteration loop through myTasks or is there a better way?
for(Integer c=myRecipients.size()-1; c>=0; --c){
for(Task t:myTasks){
if(myRecipients.get(c).id == t.whoid){
myRecipients.remove(c);
}
}
}
List<Task> myTasks=[SELECT id, whoid, subject FROM task WHERE createddate >:dtRange];
List<Id> whoIds = new List<Id>();
for(Task t : myTasks)
{
whoIds.add(t.WhoId);
}
List<Contact>myRecipients = [SELECT id, firstname, lastname, email FROM contact WHERE firstname='Tim' and Id not in : whoIds];
You can also have a look at the set object that you could use instead of list. There's a contains and a remove mtehod if you have the specific object ( in your example you dont have the object)
Or you could get it to work using a map.