Specs

and?(any()) :: (any() -> boolean())

Curried and?/2.

Examples

iex> isTwo? = Fxnk.Logic.and?(2)
iex> isTwo?.(2)
true
iex> isTwo?.(3)
false

Specs

and?(any(), any()) :: boolean()

and? returns true if both inputs are the same, opposite of is_not/2.

Examples

iex> Fxnk.Logic.and?(2, 2)
true
iex> Fxnk.Logic.and?("hello", "world")
false

Specs

both?(function(), function()) :: (any() -> boolean())

Curried both?/3.

Examples

iex> gt10lt20? = Fxnk.Logic.both?(fn x -> x > 10 end, fn x -> x < 20 end)
iex> gt10lt20?.(15)
true
iex> gt10lt20?.(30)
false

Specs

both?(function(), function(), any()) :: boolean()

both?/3 takes an input and two predicate functions, returning true if both functions are true when passed the input.

Examples

iex> Fxnk.Logic.both?(15, fn x -> x > 10 end, fn x -> x < 20 end)
true
iex> Fxnk.Logic.both?(30, fn x -> x > 10 end, fn x -> x < 20 end)
false

Specs

complement(any()) :: boolean()

complement/1 returns the opposite of the boolean passed to it.

Examples

iex> Fxnk.Logic.complement(true)
false
iex> Fxnk.Logic.complement(false)
true

Specs

default_to(any()) :: (any() -> boolean())

Curried default_to/2

Examples

iex> defaultTo42 = Fxnk.Logic.default_to(42)
iex> defaultTo42.(false)
42
iex> defaultTo42.(nil)
42
iex> defaultTo42.("thanks for all the fish")
"thanks for all the fish"

Specs

default_to(any(), any()) :: any()

default_to/2 takes two values and returns the right side value if the left side is false or nil

Examples

iex> false |> Fxnk.Logic.default_to(42)
42
iex> nil |> Fxnk.Logic.default_to(42)
42
iex> "hello, world" |> Fxnk.Logic.default_to(42)
"hello, world"

Specs

either?(function(), function()) :: (any() -> boolean())

Curried either/3

Examples

iex> lt10orGt30? = Fxnk.Logic.either?(fn x -> x < 10 end, fn x -> x > 30 end)
iex> lt10orGt30?.(5)
true
iex> lt10orGt30?.(15)
false

Specs

either?(any(), function(), function()) :: boolean()

either?/3 takes an input and two predicate functions and returns true if either predicate is true.

Examples

iex> Fxnk.Logic.either?(5, fn x -> x < 10 end, fn x -> x > 30 end)
true
iex> Fxnk.Logic.either?(15, fn x -> x < 10 end, fn x -> x > 30 end)
false

Specs

equals(any()) :: (any() -> boolean())

Curried equals/2

Example

iex> eq_three = Fxnk.Logic.equals(3)
iex> eq_three.(3)
true
iex> eq_three.(4)
false

Specs

equals(any(), any()) :: boolean()

Returns true if the two values passed to it are the same, false otherwise.

Example

iex> Fxnk.Logic.equals(%{foo: "foo"}, %{foo: "foo"})
true
iex> Fxnk.Logic.equals(%{foo: "foo"}, %{bar: "bar"})
false

Specs

equals_by(function()) :: (any() -> (any() -> boolean()))

Curried equals_by/3

Example

iex> eq_by_math_abs = Fxnk.Logic.equals_by(&Kernel.abs/1)
iex> eq_by_math_abs.(5).(-5)
true

Specs

equals_by((function() -> any()), any(), any()) :: boolean()

Takes a function and applies the function to both arguments, returning if they are equal.

Example

iex> Fxnk.Logic.equals_by(&Kernel.abs/1, 5, -5)
true

Specs

gt?(number()) :: (number() -> boolean())

Curried greater than function, returns a function that returns true if the second number passed in is greater than the first.

Examples

iex> greaterThan5? = Fxnk.Logic.gt?(5) iex> greaterThan5?.(19) true iex> greaterThan5?.(3) false

Specs

is_empty(any()) :: boolean()

is_empty/1 returns true if passed an empty Map or List.

Examples

iex> Fxnk.Logic.is_empty([])
true
iex> Fxnk.Logic.is_empty(%{})
true
iex> Fxnk.Logic.is_empty([1,1,2,3,5,8])
false

Specs

is_not?(any()) :: (any() -> boolean())

Curried is_not?/2

Examples

iex> isNotThree = Fxnk.Logic.is_not?(3)
iex> isNotThree.(3)
false
iex> isNotThree.(4)
true

Specs

is_not?(any(), any()) :: boolean()

is_not/3 returns true if both inputs are not the same, opposite of and?/2

Examples

iex> Fxnk.Logic.is_not?(3, 3)
false
iex> Fxnk.Logic.is_not?(3, 4)
true

Specs

lt?(number()) :: (number() -> boolean())

Curried less than function, returns a function that returns true if the second number passed in is less than the first.

Examples

iex> lessThan5? = Fxnk.Logic.lt?(5) iex> lessThan5?.(19) false iex> lessThan5?.(3) true

Specs

nil?(any()) :: boolean()

Checks if a value is equal to nil.

Examples

iex> Fxnk.Logic.nil?(nil)
true
iex> Fxnk.Logic.nil?("not nil")
false

Specs

not_nil?(any()) :: boolean()

Checks if a value is not nil.

Examples

iex> Fxnk.Logic.not_nil?(nil)
false
iex> Fxnk.Logic.not_nil?("not nil")
true

Specs

or?(any()) :: (boolean() -> boolean())

Curried or/2

Examples

iex> willBeTrue = Fxnk.Logic.or?(true) iex> willBeTrue.(false) true

Specs

or?(boolean(), boolean()) :: boolean()

or/2 returns true if one or both of its arguments are true.

Examples

iex> Fxnk.Logic.or?(true, false)
true
iex> Fxnk.Logic.or?(true, true)
true
iex> Fxnk.Logic.or?(false, false)
false