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samchencode
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Published
Fall 2018 App Club Lessons
By
samchencode
Edited
Oct 26, 2018
1 fork
Insert cell
Insert cell
Insert cell
Insert cell
{
let
resultArray
=
[
]
for
(
let
i
=
0
;
i
<
array
.
length
;
i
++
)
{
if
(
array
[
i
]
<
30
)
resultArray
.
push
(
array
[
i
]
)
}
return
resultArray
}
Insert cell
Insert cell
lessThanThirty
=
x
=>
x
<
30
Insert cell
array
.
filter
(
lessThanThirty
)
Insert cell
Insert cell
Insert cell
digitToLetters
=
x
=>
(
""
+
x
)
.
split
(
""
)
.
map
(
d
=>
[
"a"
,
"b"
,
"c"
,
"d"
,
'e'
,
'f'
,
'g'
,
'h'
,
'i'
,
'j'
]
[
d
-
1
]
)
.
join
(
""
)
Insert cell
array
.
map
(
digitToLetters
)
Insert cell
Insert cell
Insert cell
reducer
=
(
agg
,
curVal
)
=>
agg
+
curVal
Insert cell
initialValue
=
0
Insert cell
Insert cell
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array
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lessThanThirty
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digitToLetters
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reducer
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initialValue
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