In reply to ritheshraj:
For a queue, you can refer the following code:
int index[$];
do begin
index = q_int.find_index(x) with (x == 500);
if(index.size()) begin
q_int.delete(index.pop_front());
end
end
while(index.size());
Or this way:
for(int i = 0; i < q_int.size(); i++) begin
if(q_int[i] == 500) begin
q_int.delete(i--);
end
end