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<!DOCTYPE html
>
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FP.Recursion — hackerrank v0.1.0
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hackerrank v0.1.0
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FP.Recursion
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<
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moduledoc
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<
p
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Elixir solutions for HackerRank functional programming challenges: recursions.
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Summary
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Functions
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compress_string(str)
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p
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String compression
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<
div
class
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summary-row
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>
<
div
class
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<
a
href
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#fibonacci/1
"
>
fibonacci(n)
</
a
>
</
div
>
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div
class
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summary-synopsis
"
>
<
p
>
Fibonocci numbers
</
p
>
</
div
>
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div
>
<
div
class
="
summary-row
"
>
<
div
class
="
summary-signature
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>
<
a
href
="
#filter_elements/2
"
>
filter_elements(k, nums)
</
a
>
</
div
>
<
div
class
="
summary-synopsis
"
>
<
p
>
Filter elements
</
p
>
</
div
>
</
div
>
<
div
class
="
summary-row
"
>
<
div
class
="
summary-signature
"
>
<
a
href
="
#gcd/1
"
>
gcd(list)
</
a
>
</
div
>
<
div
class
="
summary-synopsis
"
>
<
p
>
Computing the greatest common divisor (GCD) with Euclidean Algorithm
</
p
>
</
div
>
</
div
>
<
div
class
="
summary-row
"
>
<
div
class
="
summary-signature
"
>
<
a
href
="
#mingle_string/1
"
>
mingle_string(list)
</
a
>
</
div
>
<
div
class
="
summary-synopsis
"
>
<
p
>
String mingling
</
p
>
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div
>
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div
>
<
div
class
="
summary-row
"
>
<
div
class
="
summary-signature
"
>
<
a
href
="
#pascal_tri/3
"
>
pascal_tri(k, m \\ 1, tri_data \\ [])
</
a
>
</
div
>
<
div
class
="
summary-synopsis
"
>
<
p
>
Pascal's triangle
</
p
>
</
div
>
</
div
>
<
div
class
="
summary-row
"
>
<
div
class
="
summary-signature
"
>
<
a
href
="
#permute_string/1
"
>
permute_string(string)
</
a
>
</
div
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div
class
="
summary-synopsis
"
>
<
p
>
String-o-Permute
</
p
>
</
div
>
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div
>
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div
class
="
summary-row
"
>
<
div
class
="
summary-signature
"
>
<
a
href
="
#prefix_compress/1
"
>
prefix_compress(data)
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a
>
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div
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div
class
="
summary-synopsis
"
>
<
p
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Prefix compression
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p
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div
class
="
summary-row
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>
<
div
class
="
summary-signature
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>
<
a
href
="
#string_reduce/1
"
>
string_reduce(str)
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a
>
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div
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div
class
="
summary-synopsis
"
>
<
p
>
String reductions
</
p
>
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div
>
</
div
>
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div
class
="
summary-row
"
>
<
div
class
="
summary-signature
"
>
<
a
href
="
#sum_of_powers/1
"
>
sum_of_powers(list)
</
a
>
</
div
>
<
div
class
="
summary-synopsis
"
>
<
p
>
The Sum of powers
</
p
>
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id
="
functions
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class
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class
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>
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<
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class
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Link to this section
</
span
>
</
a
>
Functions
</
h1
>
<
div
class
="
functions-list
"
>
<
section
class
="
detail
"
id
="
compress_string/1
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div
class
="
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"
>
<
a
href
="
#compress_string/1
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class
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detail-link
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title
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Link to this function
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>
<
span
class
="
icon-link
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aria-hidden
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class
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a
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<
h1
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compress_string(str)
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section
class
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<
p
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String compression
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<
p
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https://www.hackerrank.com/challenges/string-compression/problem
</
p
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</
section
>
</
section
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<
section
class
="
detail
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id
="
fibonacci/1
"
>
<
div
class
="
detail-header
"
>
<
a
href
="
#fibonacci/1
"
class
="
detail-link
"
title
="
Link to this function
"
>
<
span
class
="
icon-link
"
aria-hidden
="
true
"
>
</
span
>
<
span
class
="
sr-only
"
>
Link to this function
</
span
>
</
a
>
<
h1
class
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signature
"
>
fibonacci(n)
</
span
>
<
div
class
="
specs
"
>
<
pre
>
fibonacci(
<
a
href
="
https://hexdocs.pm/elixir/typespecs.html#basic-types
"
>
integer
</
a
>
()) ::
<
a
href
="
https://hexdocs.pm/elixir/typespecs.html#basic-types
"
>
integer
</
a
>
()
</
pre
>
</
div
>
</
div
>
<
section
class
="
docstring
"
>
<
p
>
Fibonocci numbers
</
p
>
<
p
>
https://www.hackerrank.com/challenges/functional-programming-warmups-in-recursion---fibonacci-numbers/problem
</
p
>
</
section
>
</
section
>
<
section
class
="
detail
"
id
="
filter_elements/2
"
>
<
div
class
="
detail-header
"
>
<
a
href
="
#filter_elements/2
"
class
="
detail-link
"
title
="
Link to this function
"
>
<
span
class
="
icon-link
"
aria-hidden
="
true
"
>
</
span
>
<
span
class
="
sr-only
"
>
Link to this function
</
span
>
</
a
>
<
h1
class
="
signature
"
>
filter_elements(k, nums)
</
span
>
</
div
>
<
section
class
="
docstring
"
>
<
p
>
Filter elements
</
p
>
<
p
>
https://www.hackerrank.com/challenges/filter-elements/problem
</
p
>
</
section
>
</
section
>
<
section
class
="
detail
"
id
="
gcd/1
"
>
<
div
class
="
detail-header
"
>
<
a
href
="
#gcd/1
"
class
="
detail-link
"
title
="
Link to this function
"
>
<
span
class
="
icon-link
"
aria-hidden
="
true
"
>
</
span
>
<
span
class
="
sr-only
"
>
Link to this function
</
span
>
</
a
>
<
h1
class
="
signature
"
>
gcd(list)
</
span
>
<
div
class
="
specs
"
>
<
pre
>
gcd([
<
a
href
="
https://hexdocs.pm/elixir/typespecs.html#basic-types
"
>
integer
</
a
>
()]) ::
<
a
href
="
https://hexdocs.pm/elixir/typespecs.html#basic-types
"
>
integer
</
a
>
()
</
pre
>
</
div
>
</
div
>
<
section
class
="
docstring
"
>
<
p
>
Computing the greatest common divisor (GCD) with Euclidean Algorithm
</
p
>
<
p
>
https://www.hackerrank.com/challenges/functional-programming-warmups-in-recursion---gcd/problem
</
p
>
</
section
>
</
section
>
<
section
class
="
detail
"
id
="
mingle_string/1
"
>
<
div
class
="
detail-header
"
>
<
a
href
="
#mingle_string/1
"
class
="
detail-link
"
title
="
Link to this function
"
>
<
span
class
="
icon-link
"
aria-hidden
="
true
"
>
</
span
>
<
span
class
="
sr-only
"
>
Link to this function
</
span
>
</
a
>
<
h1
class
="
signature
"
>
mingle_string(list)
</
span
>
</
div
>
<
section
class
="
docstring
"
>
<
p
>
String mingling
</
p
>
<
p
>
https://www.hackerrank.com/challenges/string-mingling/problem
</
p
>
</
section
>
</
section
>
<
section
class
="
detail
"
id
="
pascal_tri/3
"
>
<
span
id
="
pascal_tri/1
"
>
</
span
>
<
span
id
="
pascal_tri/2
"
>
</
span
>
<
div
class
="
detail-header
"
>
<
a
href
="
#pascal_tri/3
"
class
="
detail-link
"
title
="
Link to this function
"
>
<
span
class
="
icon-link
"
aria-hidden
="
true
"
>
</
span
>
<
span
class
="
sr-only
"
>
Link to this function
</
span
>
</
a
>
<
h1
class
="
signature
"
>
pascal_tri(k, m \\ 1, tri_data \\ [])
</
span
>
</
div
>
<
section
class
="
docstring
"
>
<
p
>
Pascal's triangle
</
p
>
<
p
>
https://www.hackerrank.com/challenges/pascals-triangle/problem
</
p
>
</
section
>
</
section
>
<
section
class
="
detail
"
id
="
permute_string/1
"
>
<
div
class
="
detail-header
"
>
<
a
href
="
#permute_string/1
"
class
="
detail-link
"
title
="
Link to this function
"
>
<
span
class
="
icon-link
"
aria-hidden
="
true
"
>
</
span
>
<
span
class
="
sr-only
"
>
Link to this function
</
span
>
</
a
>
<
h1
class
="
signature
"
>
permute_string(string)
</
span
>
</
div
>
<
section
class
="
docstring
"
>
<
p
>
String-o-Permute
</
p
>
<
p
>
https://www.hackerrank.com/challenges/string-o-permute/problem
</
p
>
</
section
>
</
section
>
<
section
class
="
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prefix_compress/1
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prefix_compress(data)
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prefix_compress([
<
a
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"
>
binary
</
a
>
()]) :: [
<
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"
>
tuple
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()]
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Prefix compression
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https://www.hackerrank.com/challenges/prefix-compression/problem
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string_reduce/1
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string_reduce(str)
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String reductions
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sum_of_powers(list)
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The Sum of powers
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p
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https://www.hackerrank.com/challenges/functional-programming-the-sums-of-powers/problem
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