72 lines
1.6 KiB
Elixir
72 lines
1.6 KiB
Elixir
defmodule Numbers do
|
|
require Integer
|
|
use Koans
|
|
|
|
@intro "Numbers"
|
|
|
|
koan "Are you odd?" do
|
|
assert Integer.is_odd(3) == ___
|
|
end
|
|
|
|
koan "Actually you might be even" do
|
|
assert Integer.is_even(4) == ___
|
|
end
|
|
|
|
koan "Let's grab the individual digits in a list" do
|
|
individual_digits = Integer.digits(58127)
|
|
assert individual_digits == ___
|
|
end
|
|
|
|
koan "Oh no! I need it back together" do
|
|
number = Integer.undigits([1, 2, 3, 4])
|
|
|
|
assert number == ___
|
|
end
|
|
|
|
koan "I think I need my number as a char" do
|
|
char_digit = Integer.to_char_list(7)
|
|
|
|
assert char_digit == ___
|
|
end
|
|
|
|
koan "Actually I want my number as a string" do
|
|
string_digit = Integer.to_string(1234)
|
|
|
|
assert string_digit == ___
|
|
end
|
|
|
|
koan "The meaning of life in hexidecimal is 2A!" do
|
|
assert Integer.parse("2A", 16) == {___, ""}
|
|
end
|
|
|
|
koan "I don't want this decimal point, let's round up" do
|
|
assert Float.ceil(34.25) == ___
|
|
end
|
|
|
|
koan "OK, I only want it to 1 decimal place" do
|
|
assert Float.ceil(34.25, 1) == ___
|
|
end
|
|
|
|
koan "Rounding down is what I need" do
|
|
assert Float.floor(99.99) == ___
|
|
end
|
|
|
|
koan "Rounding down to 2 decimal places" do
|
|
assert Float.floor(12.345, 2) == ___
|
|
end
|
|
|
|
koan "Just want to parse to a float" do
|
|
assert Float.parse("34.5") == {___, ""}
|
|
end
|
|
|
|
koan "Hmm, I want to parse this but it has some strings" do
|
|
assert Float.parse("1 million dollars") == {___, " million dollars"}
|
|
end
|
|
|
|
koan "Round the number up or down for me" do
|
|
assert Float.round(5.5) == ___
|
|
assert Float.round(5.4) == ___
|
|
assert Float.round(8.94, 1) == ___
|
|
assert Float.round(-5.5674, 3) == ___
|
|
end
|
|
end |