How to find duplicate word in string?

Question

Write a code to find the duplicate words in a string. 
 input string = "Big black bug bit a big black dog on his big black nose" 
 output: 
 Duplicate words in a given string : big black

Harshit Bumb (Appyzie) · Answer

a!localVariables(
 local!string: "Big black bug bit a big black dog on his big black nose",
 local!array: split(local!string," "),
 local!uniqueItems: union(local!array,local!array),
 a!forEach(
 items: local!uniqueItems,
 expression: if(
 count(wherecontains(fv!item,local!array))>1,
 fv!item,
 {}
 )
 )
)

Harshmodi · Answer

Handling Unnecessary spaces: a!localVariables(
local!string: "Big black bug bit a big black dog on his big black nose nose ",
local!data: split(local!string, " "),
/* Handling null in case of unnecessary spaces */
local!list: reject(fn!isnull, local!data),
local!result: a!forEach(
items: local!list,
expression: if(
length(wherecontains(fv!item, local!list)) > 1,
fv!item,
{}
)
),
union(local!result, local!result)
)

How to find duplicate word in string?

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