https://github.com/parroty/exprintf

A printf / sprintf library for Elixir. It works as a wrapper for :io.format.
https://github.com/parroty/exprintf

Last synced: 2 months ago
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A printf / sprintf library for Elixir. It works as a wrapper for :io.format.

• Host: GitHub
• URL: https://github.com/parroty/exprintf
• Owner: parroty
• License: mit
• Created: 2013-08-24T03:13:36.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2024-08-05T09:09:16.000Z (5 months ago)
• Last Synced: 2024-10-05T15:16:47.886Z (3 months ago)
• Language: Elixir
• Homepage:
• Size: 26.4 KB
• Stars: 34
• Watchers: 2
• Forks: 12
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md

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README

        
ExPrintf [![Build Status](https://secure.travis-ci.org/parroty/exprintf.png?branch=master "Build Status")](http://travis-ci.org/parroty/exprintf)

============

A printf / sprintf library for Elixir. It works as a wrapper for :io.format.

When learning Elixir / Erlang, remembering :io.format style is a little tough. This one can be used as syntax sugar, or an util to convert printf format to Elixir (Erlang) one.

# Examples

## Basic Usage

```elixir

defmodule Sample do

  import ExPrintf

  def test do

    printf("number = %d\n", [10])

    # -> number = 10

    IO.puts sprintf("string = %s", ["abc"])

    # -> string = abc

    format = parse_printf("format = %d %.2f\n")

    IO.inspect format

    # -> "format = ~w ~.2f\n"

    :io.format(format, [10, 10.153])

    # -> format = 10 10.15

    IO.puts :io_lib.format(format, [10, 10.153])

    # -> format = 10 10.15

  end

end

Sample.test

```

## Sample Execution

```

$ mix run sample.ex

number = 10

string = abc

"format = ~w ~.2f\n"

format = 10 10.15

```

## iex

```

$ git clone [email protected]:parroty/exprintf.git

$ cd exprintf

$ ./run_iex.sh

$ iex(1) -> parse_printf("%d")

"~w"

```

## Dynamo

The following hosts a sample dynamo application for the printf format conversion.

http://dynamo-exprintf.herokuapp.com/

## TODO

- Improve error checking

- Improve format support coverage

  - sprintf("%05d", [-10]) results in "00-10", instead of "-00010".