Basic Examples
(
1
)
Find the duplicates in a
L
i
s
t
:
I
n
[
1
6
]
:
=
[
◼
]
D
u
p
l
i
c
a
t
e
s
L
i
s
t
[
{
x
,
y
,
x
,
z
,
y
,
w
}
]
O
u
t
[
1
6
]
=
{
x
,
y
}
P
r
o
p
e
r
t
i
e
s
a
n
d
R
e
l
a
t
i
o
n
s
(
1
)