What filename do you want to read? run2.txt
Command: append a 10
CoolVector a: [10] size=1 cap=3
CoolVector b: [] size=0 cap=3

Command: append a 20
CoolVector a: [10 20] size=2 cap=3
CoolVector b: [] size=0 cap=3

Command: append a 30
CoolVector a: [10 20 30] size=3 cap=3
CoolVector b: [] size=0 cap=3

Command: append a 40
CoolVector a: [10 20 30 40] size=4 cap=6
CoolVector b: [] size=0 cap=3

Command: append b -2
CoolVector a: [10 20 30 40] size=4 cap=6
CoolVector b: [-2] size=1 cap=3

Command: append b a
CoolVector a: [10 20 30 40] size=4 cap=6
CoolVector b: [-2 10 20 30 40] size=5 cap=5

Command: append a b
CoolVector a: [10 20 30 40 -2 10 20 30 40] size=9 cap=9
CoolVector b: [-2 10 20 30 40] size=5 cap=5