View Source Multitool.Numbers (multitool v0.3.4)
The Numbers module holds helper functions for number operations such as primes and factors
Link to this section Summary
Functions
Shifts all digits one place to the right, bringing the right most digit to the leftmost position
Shifts all digits to the right, repeated a given number of times.
Generates a MapSet of numbers resulting from cycling the given number so each digit is in each position once
Evaluates if a number is greater than negative one and does not have a remainder
Returns the given number without the leftmost digit
Returns the given number without the rightmost digit
Link to this section Functions
Shifts all digits one place to the right, bringing the right most digit to the leftmost position
If the operation of bringing the rightmost digit to the leftmost position would result in the leading number of the resulting integer being a zero, the digits are repeatedly shifted until a zero is not in the leftmost position
parameters
Parameters
n: The integer to cycle
examples
Examples
iex> cycle(57)
75
iex> cycle(-57)
-75
iex> cycle(190)
901Shifts all digits to the right, repeated a given number of times.
This operation operates the same as cycle/1 regarding leading zeroes
If the operation of bringing the rightmost digit to the leftmost position would result in the leading number of the resulting integer being a zero, the digits are repeatedly shifted until a zero is not in the leftmost position
parameters
Parameters
n: The integer to cycle
c: The amount of times to apply the cycle operation
examples
Examples
iex> cycle(57, 1)
75
iex> cycle(-57, 2)
-57
iex> cycle(190, 2)
190Generates a MapSet of numbers resulting from cycling the given number so each digit is in each position once
This operation operates the same as cycle/1 regarding leading zeroes
If the operation of bringing the rightmost digit to the leftmost position would result in the leading number of the resulting integer being a zero, the digits are repeatedly shifted until a zero is not in the leftmost position
parameters
Parameters
n: The integer to generate cycles of
examples
Examples
iex> cycles(123) |> MapSet.to_list()
[123, 231, 312]
iex> cycles(-57) |> MapSet.to_list()
[-75, -57]Evaluates if a number is greater than negative one and does not have a remainder
parameters
Parameters
n: Integer to evaluate for naturalness
examples
Examples
iex> natural?(-5)
false
iex> natural?(7)
true
iex> natural?(7.5)
false
iex> natural?(7.0)
trueReturns the given number without the leftmost digit
When the given number is between negative nine and nine, zero is returned
parameters
Parameters
n: Integer to trim the leftmost digit off of
examples
Examples
iex> trim_left(57689)
7689
iex> trim_left(7)
0
iex> trim_left(-56788)
-6788
iex> trim_left(-3)
0Returns the given number without the rightmost digit
When the given number is between negative nine and nine, zero is returned
parameters
Parameters
n: Integer to trim the rightmost digit off of
examples
Examples
iex> trim_right(57689)
5768
iex> trim_right(7)
0
iex> trim_right(-56788)
-5678
iex> trim_right(-3)
0