ByeongUkChoi / transformer

Flexible type conversion lightweight library

Transformer

Transformer is lightweight library that helps with flexible type conversion.

Installation

If available in Hex, the package can be installed by adding transformer to your list of dependencies in mix.exs:

def deps do
  [
    {:transformer, "~> 0.0.1"}
  ]
end

Usage

Convert to integer without error.
If it cannot be converted, it returns a substitute.

iex> Transformer.to_integer_or(1)
1

iex> Transformer.to_integer_or("2")
2

iex> Transformer.to_integer_or("a")
"a"

iex> Transformer.to_integer_or("a", nil)
nil

iex> Transformer.to_integer_or("a", & &1 <> &1)
"aa"

Divides a string and convert to integer list without error.
If it cannot be converted, it returns a substitute.

iex> Transformer.to_integer_list_or("1")
[1]

iex> Transformer.to_integer_list_or("1,2")
[1, 2]

iex> Transformer.to_integer_list_or("1,a")
[1, "a"]

iex> Transformer.to_integer_list_or("1,a", nil)
[1, nil]

iex> Transformer.to_integer_list_or([1, 2])
[1, 2]

iex> Transformer.to_integer_list_or(["a", 2], nil)
[nil, 2]

Documentation

Documentation can be generated with ExDoc and published on HexDocs. Once published, the docs can be found at https://hexdocs.pm/transformer.

License

Copyright 2022 ByeongUk Choi

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.