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First working version.
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‎.gitignore

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/_build
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/deps
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erl_crash.dump
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*.ez
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.idea/

‎README.md

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# Slugger
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This package provides a library and a protocol to create [slugs](http://en.wikipedia.org/wiki/Semantic_URL#Slug) for given strings.
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By default, a slug will be containing _only_ chars `a-z0-9` and the default seperator `-`.
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## Library
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Using the library is straightforward, check out a few examples:
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```elixir
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iex(1)> Slugger.slugify " a b c "
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"a-b-c"
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iex(2)> Slugger.slugify "A cool title of a blog post"
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"a-cool-title-of-a-blog-post"
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iex(3)> Slugger.slugify "A cool title of a blog post, wikipedia style", ?_
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"a_cool_title_of_a_blog_post_wikipedia_style"
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```
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## Protocol
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Next to the library, a protocol is provided to ease creating slugs for own data structures.
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By default, the protocol will try to run `Slugger.slugify(Kernel.to_string(your_data))`, so if your_data implents `String.Chars` that returned string will be slugified.
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If you want to provide a own way to create a slug, check out the following example:
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```elixir
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iex(4)> defmodule User do
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...(4)> defstruct name: "Julius Beckmann"
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...(4)> end
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iex(5)> defimpl Slugify, for: User do
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...(5)> def slugify(user), do: Slugger.slugify(user.name)
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...(5)> end
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iex(6)> Slugify.slugify %User{}
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"julius-beckmann"
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```
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## Replacements
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Special chars like `äöüéáÁÉ` will be replaced by rules given in the file [lib/replacements.exs](lib/replacements.exs).
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Modify that file if you need have own replacement rules and __recompile__.

‎config/config.exs

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# This file is responsible for configuring your application
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# and its dependencies with the aid of the Mix.Config module.
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use Mix.Config
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# This configuration is loaded before any dependency and is restricted
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# to this project. If another project depends on this project, this
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# file won't be loaded nor affect the parent project. For this reason,
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# if you want to provide default values for your application for third-
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# party users, it should be done in your mix.exs file.
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# Sample configuration:
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#
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# config :logger, :console,
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# level: :info,
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# format: "$date $time [$level] $metadata$message\n",
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# metadata: [:user_id]
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# It is also possible to import configuration files, relative to this
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# directory. For example, you can emulate configuration per environment
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# by uncommenting the line below and defining dev.exs, test.exs and such.
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# Configuration from the imported file will override the ones defined
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# here (which is why it is important to import them last).
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#
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# import_config "#{Mix.env}.exs"

‎lib/replacements.exs

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[
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# This file was generated from these two files:
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# https://github.com/easybook/slugger/blob/master/src/Easybook/Slugger.php
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# https://github.com/keyvanakbary/slugifier/blob/master/src/Slugifier.php
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# Latin
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{?°, '0'},{?æ, 'ae'},{?ǽ, 'ae'},{?À, 'A'},{?Á, 'A'},{?Â, 'A'},{?Ã, 'A'},{?Å, 'A'},{?Ǻ, 'A'},{?Ă, 'A'},
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{?Ǎ, 'A'},{?Æ, 'AE'},{?Ǽ, 'AE'},{?à, 'a'},{?á, 'a'},{?â, 'a'},{?ã, 'a'},{?å, 'a'},{?ǻ, 'a'},{?ă, 'a'},
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{?ǎ, 'a'},{?ª, 'a'},{?@, 'at'},{?Ĉ, 'C'},{?Ċ, 'C'},{?ĉ, 'c'},{?ċ, 'c'},{?©, 'c'},{?Ð, 'D'},{?Đ, 'D'},
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{?ð, 'd'},{?đ, 'd'},{?È, 'E'},{?É, 'E'},{?Ê, 'E'},{?Ë, 'E'},{?Ĕ, 'E'},{?Ė, 'E'},{?è, 'e'},{?é, 'e'},
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{?ê, 'e'},{?ë, 'e'},{?ĕ, 'e'},{?ė, 'e'},{?ƒ, 'f'},{?Ĝ, 'G'},{?Ġ, 'G'},{?ĝ, 'g'},{?ġ, 'g'},{?Ĥ, 'H'},
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{?Ħ, 'H'},{?ĥ, 'h'},{?ħ, 'h'},{?Ì, 'I'},{?Í, 'I'},{?Î, 'I'},{?Ï, 'I'},{?Ĩ, 'I'},{?Ĭ, 'I'},{?Ǐ, 'I'},
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{?Į, 'I'},{?IJ, 'IJ'},{?ì, 'i'},{?í, 'i'},{?î, 'i'},{?ï, 'i'},{?ĩ, 'i'},{?ĭ, 'i'},{?ǐ, 'i'},{?į, 'i'},
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{?ij, 'ij'},{?Ĵ, 'J'},{?ĵ, 'j'},{?Ĺ, 'L'},{?Ľ, 'L'},{?Ŀ, 'L'},{?ĺ, 'l'},{?ľ, 'l'},{?ŀ, 'l'},{?Ñ, 'N'},
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{?ñ, 'n'},{?ʼn, 'n'},{?Ò, 'O'},{?Ô, 'O'},{?Õ, 'O'},{?Ō, 'O'},{?Ŏ, 'O'},{?Ǒ, 'O'},{?Ő, 'O'},{?Ơ, 'O'},
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{?Ø, 'O'},{?Ǿ, 'O'},{?Œ, 'OE'},{?ò, 'o'},{?ô, 'o'},{?õ, 'o'},{?ō, 'o'},{?ŏ, 'o'},{?ǒ, 'o'},{?ő, 'o'},
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{?ơ, 'o'},{?ø, 'o'},{?ǿ, 'o'},{?º, 'o'},{?œ, 'oe'},{?Ŕ, 'R'},{?Ŗ, 'R'},{?ŕ, 'r'},{?ŗ, 'r'},{?Ŝ, 'S'},
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{?Ș, 'S'},{?ŝ, 's'},{?ș, 's'},{?ſ, 's'},{?Ţ, 'T'},{?Ț, 'T'},{?Ŧ, 'T'},{?Þ, 'TH'},{?ţ, 't'},{?ț, 't'},
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{?ŧ, 't'},{?þ, 'th'},{?Ù, 'U'},{?Ú, 'U'},{?Û, 'U'},{?Ũ, 'U'},{?Ŭ, 'U'},{?Ű, 'U'},{?Ų, 'U'},{?Ư, 'U'},
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{?Ǔ, 'U'},{?Ǖ, 'U'},{?Ǘ, 'U'},{?Ǚ, 'U'},{?Ǜ, 'U'},{?ù, 'u'},{?ú, 'u'},{?û, 'u'},{?ũ, 'u'},{?ŭ, 'u'},
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{?ű, 'u'},{?ų, 'u'},{?ư, 'u'},{?ǔ, 'u'},{?ǖ, 'u'},{?ǘ, 'u'},{?ǚ, 'u'},{?ǜ, 'u'},{?Ŵ, 'W'},{?ŵ, 'w'},
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{?Ý, 'Y'},{?Ÿ, 'Y'},{?Ŷ, 'Y'},{?ý, 'y'},{?ÿ, 'y'},{?ŷ, 'y'},{?Ç, 'C'},{?Ó, 'O'},{?ç, 'c'},{?ó, 'o'},
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# Arabic
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{?أ, 'a'},{?ب, 'b'},{?ت, 't'},{?ث, 'th'},{?ج, 'g'},{?ح, 'h'},{?خ, 'kh'},{?د, 'd'},{?ذ, 'th'},{?ر, 'r'},
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{?ز, 'z'},{?س, 's'},{?ش, 'sh'},{?ص, 's'},{?ض, 'd'},{?ط, 't'},{?ظ, 'th'},{?ع, 'aa'},{?غ, 'gh'},{?ف, 'f'},
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{?ق, 'k'},{?ك, 'k'},{?ل, 'l'},{?م, 'm'},{?ن, 'n'},{?ه, 'h'},{?و, 'o'},{?ي, 'y'},
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# Croatian
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{?Đ, 'D'},{?đ, 'd'},
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# Czech
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{?Č, 'C'},{?Ď, 'D'},{?Ě, 'E'},{?Ň, 'N'},{?Ř, 'R'},{?Š, 'S'},{?Ť, 'T'},{?Ů, 'U'},{?Ž, 'Z'},{?č, 'c'},
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{?ď, 'd'},{?ě, 'e'},{?ň, 'n'},{?ř, 'r'},{?š, 's'},{?ť, 't'},{?ů, 'u'},{?ž, 'z'},
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# Esperanto
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{?Ĉ, 'C'},{?ĉ, 'c'},{?Ĝ, 'G'},{?ĝ, 'g'},{?Ĥ, 'H'},{?ĥ, 'h'},{?Ĵ, 'J'},{?ĵ, 'j'},{?Ŝ, 'S'},{?ŝ, 's'},
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{?Ŭ, 'U'},{?ŭ, 'u'},
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# German
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{?Ä, 'AE'},{?Ö, 'OE'},{?Ü, 'UE'},{?ß, 'ss'},{?ä, 'ae'},{?ö, 'oe'},{?ü, 'ue'},
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# Greek
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{?Α, 'A'},{?Β, 'B'},{?Γ, 'G'},{?Δ, 'D'},{?Ε, 'E'},{?Ζ, 'Z'},{?Η, 'H'},{?Θ, '8'},{?Ι, 'I'},{?Κ, 'K'},
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{?Λ, 'L'},{?Μ, 'M'},{?Ν, 'N'},{?Ξ, '3'},{?Ο, 'O'},{?Π, 'P'},{?Ρ, 'R'},{?Σ, 'S'},{?Τ, 'T'},{?Υ, 'Y'},
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{?Φ, 'F'},{?Χ, 'X'},{?Ψ, 'PS'},{?Ω, 'W'},{?Ϊ, 'I'},{?Ϋ, 'Y'},{?ά, 'a'},{?έ, 'e'},{?ή, 'h'},{?ί, 'i'},
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{?ΰ, 'y'},{?α, 'a'},{?β, 'b'},{?γ, 'g'},{?δ, 'd'},{?ε, 'e'},{?ζ, 'z'},{?η, 'h'},{?θ, '8'},{?ι, 'i'},
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{?κ, 'k'},{?λ, 'l'},{?μ, 'm'},{?ν, 'n'},{?ξ, '3'},{?ο, 'o'},{?π, 'p'},{?ρ, 'r'},{?ς, 's'},{?σ, 's'},
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{?τ, 't'},{?υ, 'y'},{?φ, 'f'},{?χ, 'x'},{?ψ, 'ps'},{?ω, 'w'},{?ϊ, 'i'},{?ϋ, 'y'},{?ό, 'o'},{?ύ, 'y'},
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{?ώ, 'w'},{?ϐ, 'b'},{?ϑ, 'th'},{?ϒ, 'Y'},{?Ά, 'A'},{?Έ, 'E'},{?Ί, 'I'},{?Ό, 'O'},{?Ύ, 'Y'},{?Ή, 'H'},
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{?Ώ, 'W'},{?ΐ, 'i'},
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# Latvian
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{?Ā, 'A'},{?Ē, 'E'},{?Ģ, 'G'},{?Ī, 'I'},{?Ķ, 'K'},{?Ļ, 'L'},{?Ņ, 'N'},{?Ū, 'U'},{?ŗ, 'r'},{?ū, 'u'},
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{?ā, 'a'},{?ē, 'e'},{?ģ, 'g'},{?ī, 'i'},{?ķ, 'k'},{?ļ, 'l'},{?ņ, 'n'},{?Ŗ, 'R'},{?Ō, 'O'},{?ō, 'o'},
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# Lithuanian
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{?Ė, 'E'},{?ė, 'e'},{?Ĩ, 'I'},{?ĩ, 'i'},{?Į, 'I'},{?į, 'i'},{?Ų, 'U'},{?ų, 'u'},
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# Maltese
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{?Ċ, 'C'},{?ċ, 'c'},{?Ġ, 'G'},{?ġ, 'g'},{?Ħ, 'H'},{?ħ, 'h'},
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# Polish
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{?Ą, 'A'},{?Ć, 'C'},{?Ę, 'E'},{?Ł, 'L'},{?Ń, 'N'},{?Ó, 'O'},{?Ś, 'S'},{?Ź, 'Z'},{?Ż, 'Z'},{?ą, 'a'},
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{?ć, 'c'},{?ę, 'e'},{?ł, 'l'},{?ń, 'n'},{?ó, 'o'},{?ś, 's'},{?ź, 'z'},{?ż, 'z'},
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# Russian
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{?А, 'A'},{?Б, 'B'},{?В, 'V'},{?Г, 'G'},{?Д, 'D'},{?Е, 'E'},{?Ё, 'E'},{?Ж, 'Zh'},{?З, 'Z'},{?И, 'I'},
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{?Й, 'J'},{?К, 'K'},{?Л, 'L'},{?М, 'M'},{?Н, 'N'},{?О, 'O'},{?П, 'P'},{?Р, 'R'},{?С, 'S'},{?Т, 'T'},
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{?У, 'U'},{?Ф, 'F'},{?Х, 'H'},{?Ц, 'C'},{?Ч, 'Ch'},{?Ш, 'Sh'},{?Щ, 'Shch'},{?Ъ, ''},{?Ы, 'Y'},{?Ь, ''},
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{?Э, 'E'},{?Ю, 'Ju'},{?Я, 'Ja'},{?а, 'a'},{?б, 'b'},{?в, 'v'},{?г, 'g'},{?д, 'd'},{?е, 'e'},{?ё, 'e'},
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{?ж, 'zh'},{?з, 'z'},{?и, 'i'},{?й, 'j'},{?к, 'k'},{?л, 'l'},{?м, 'm'},{?н, 'n'},{?о, 'o'},{?п, 'p'},
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{?р, 'r'},{?с, 's'},{?т, 't'},{?у, 'u'},{?ф, 'f'},{?х, 'h'},{?ц, 'c'},{?ч, 'ch'},{?ш, 'sh'},{?щ, 'shch'},
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{?ъ, ''},{?ы, 'y'},{?ь, ''},{?э, 'e'},{?ю, 'ju'},{?я, 'ja'},
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# Sami
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{?Ŋ, 'N'},{?ŋ, 'n'},{?Ǧ, 'G'},{?ǧ, 'g'},{?Ǩ, 'K'},{?ǩ, 'k'},{?Ʒ, 'Z'},{?ʒ, 'z'},{?Ǯ, 'Z'},{?ǯ, 'z'},
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# Serbian
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{?ђ, 'dj'},{?ј, 'j'},{?љ, 'lj'},{?њ, 'nj'},{?ћ, 'c'},{?џ, 'dz'},{?Ђ, 'Dj'},{?Ј, 'j'},{?Љ, 'Lj'},{?Њ, 'Nj'},
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{?Ћ, 'C'},{?Џ, 'Dz'},
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# Slovak
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{?Ľ, 'L'},{?ľ, 'l'},{?Ĺ, 'L'},{?ĺ, 'l'},{?Ŕ, 'R'},{?ŕ, 'r'},
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# Turkish
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{?Ç, 'C'},{?Ğ, 'G'},{?İ, 'I'},{?Ş, 'S'},{?ç, 'c'},{?ğ, 'g'},{?ı, 'i'},{?ş, 's'},
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# Ukrainian
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{?Є, 'Ye'},{?І, 'I'},{?Ї, 'Ji'},{?Ґ, 'G'},{?є, 'ye'},{?і, 'i'},{?ї, 'ji'},{?ґ, 'g'},
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# Vietnamese
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{?ạ, 'a'},{?ả, 'a'},{?ầ, 'a'},{?ấ, 'a'},{?ậ, 'a'},{?ẩ, 'a'},{?ẫ, 'a'},{?ằ, 'a'},{?ắ, 'a'},{?ặ, 'a'},
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{?ẳ, 'a'},{?ẵ, 'a'},{?ẹ, 'e'},{?ẻ, 'e'},{?ẽ, 'e'},{?ề, 'e'},{?ế, 'e'},{?ệ, 'e'},{?ể, 'e'},{?ễ, 'e'},
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{?ị, 'i'},{?ỉ, 'i'},{?ọ, 'o'},{?ỏ, 'o'},{?ồ, 'o'},{?ố, 'o'},{?ộ, 'o'},{?ổ, 'o'},{?ỗ, 'o'},{?ờ, 'o'},
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{?ớ, 'o'},{?ợ, 'o'},{?ở, 'o'},{?ỡ, 'o'},{?ụ, 'u'},{?ủ, 'u'},{?ừ, 'u'},{?ứ, 'u'},{?ự, 'u'},{?ử, 'u'},
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{?ữ, 'u'},{?ỳ, 'y'},{?ỵ, 'y'},{?ỷ, 'y'},{?ỹ, 'y'},{?Ạ, 'A'},{?Ả, 'A'},{?Ầ, 'A'},{?Ấ, 'A'},{?Ậ, 'A'},
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{?Ẩ, 'A'},{?Ẫ, 'A'},{?Ằ, 'A'},{?Ắ, 'A'},{?Ặ, 'A'},{?Ẳ, 'A'},{?Ẵ, 'A'},{?Ẹ, 'E'},{?Ẻ, 'E'},{?Ẽ, 'E'},
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{?Ề, 'E'},{?Ế, 'E'},{?Ệ, 'E'},{?Ể, 'E'},{?Ễ, 'E'},{?Ị, 'I'},{?Ỉ, 'I'},{?Ọ, 'O'},{?Ỏ, 'O'},{?Ồ, 'O'},
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{?Ố, 'O'},{?Ộ, 'O'},{?Ổ, 'O'},{?Ỗ, 'O'},{?Ờ, 'O'},{?Ớ, 'O'},{?Ợ, 'O'},{?Ở, 'O'},{?Ỡ, 'O'},{?Ụ, 'U'},
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{?Ủ, 'U'},{?Ừ, 'U'},{?Ứ, 'U'},{?Ự, 'U'},{?Ử, 'U'},{?Ữ, 'U'},{?Ỳ, 'Y'},{?Ỵ, 'Y'},{?Ỷ, 'Y'},{?Ỹ, 'Y'},
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# Other
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{?¹, '1'},{?², '2'},{?³, '3'},{?¶, 'P'}
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]
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‎lib/slugger.ex

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defmodule Slugger do
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@moduledoc """
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Calcualtes a 'slug' for a given string.
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Such a slug can be used for reading URLs or Search Engine Optimization.
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"""
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@doc """
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Return a string in form of a slug for a given string.
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## Examples
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iex> Slugger.slugify(" Hi # there ")
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"hi-there"
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iex> Slugger.slugify("Über den Wölkchen draußen im Tore")
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"ueber-den-woelkchen-draussen-im-tore"
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iex> Slugger.slugify("Wikipedia Style", ?_)
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"wikipedia_style"
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iex> Slugger.slugify("_trimming_and___removing_inside___")
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"trimming-and-removing-inside"
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"""
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def slugify(text, separator \\ ?-) do
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text
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|> replace_special_chars
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|> normalize
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|> replace_unwanted_chars(separator)
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end
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defp normalize(text) do
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text
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|> String.downcase
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end
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defp replace_unwanted_chars(text, separator) do
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text
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|> String.replace(~r/([^a-z0-9])+/, to_string([separator]))
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|> String.strip(separator)
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end
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defp replace_special_chars(text) do
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text |> to_char_list |> replace_chars |> to_string
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end
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#-- Generated function `replace_chars` below ---
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# Generate replacement functions using pattern matching.
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{replacements, _} = Code.eval_file("replacements.exs", __DIR__)
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for {search, replace} <- replacements do
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defp replace_chars([unquote(search)|t]), do: unquote(replace) ++ replace_chars(t)
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end
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# A unmatched char will be kept.
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defp replace_chars([h|t]), do: [h] ++ replace_chars(t)
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# String has come to an end, stop recursion here.
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defp replace_chars([]), do: []
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end

‎lib/slugify.ex

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defprotocol Slugify do
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@fallback_to_any true
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@doc "Returns the slug for the given data."
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def slugify(data)
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end
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defimpl Slugify, for: Any do
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@doc "Default handler for anything that implements String.Chars Protocol."
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def slugify(data), do: Slugger.slugify(Kernel.to_string data)
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end

‎mix.exs

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defmodule Slugger.Mixfile do
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use Mix.Project
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def project do
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[app: :slugger,
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version: "0.0.1",
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elixir: "~> 1.0",
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deps: deps]
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end
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# Configuration for the OTP application
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#
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# Type `mix help compile.app` for more information
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def application do
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[applications: []]
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end
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# Dependencies can be Hex packages:
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#
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# {:mydep, "~> 0.3.0"}
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#
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# Or git/path repositories:
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#
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# {:mydep, git: "https://github.com/elixir-lang/mydep.git", tag: "0.1.0"}
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#
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# Type `mix help deps` for more examples and options
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defp deps do
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[]
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end
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end

‎test/slugger_test.exs

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defmodule SluggerTest do
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use ExUnit.Case
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doctest Slugger
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test "the truth" do
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assert 1 + 1 == 2
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end
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test "string to lower" do
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assert Slugger.slugify("ABC") == "abc"
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end
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test "removing space at beginning" do
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assert Slugger.slugify(" \t \n ABC") == "abc"
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end
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test "removing space at ending" do
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assert Slugger.slugify("ABC \n \t \n ") == "abc"
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end
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test "removing space at ending and ending" do
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assert Slugger.slugify(" \n \t \n ABC \n \t \n ") == "abc"
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end
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test "replace whitespace inside with seperator" do
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assert Slugger.slugify(" A B C ") == "a-b-c"
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assert Slugger.slugify(" A B C ", ?_) == "a_b_c"
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end
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test "replace multiple seperator inside and outside" do
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assert Slugger.slugify("--a--b c - - - ") == "a-b-c"
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end
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test "replace special char with expected string" do
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assert Slugger.slugify("üba") == "ueba"
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assert Slugger.slugify("büa") == "buea"
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assert Slugger.slugify("baü") == "baue"
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assert Slugger.slugify("büaü") == "bueaue"
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end
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end

‎test/slugify_test.exs

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defmodule SlugifyTest do
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use ExUnit.Case
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doctest Slugify
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test "using protocol fallback to any" do
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assert Slugify.slugify(42) == "42"
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assert Slugify.slugify(3.1415) == "3-1415"
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assert Slugify.slugify("hello") == "hello"
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assert Slugify.slugify(:hello) == "hello"
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assert Slugify.slugify('hello') == "hello"
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assert Slugify.slugify([]) == ""
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assert Slugify.slugify(["hello", "world"]) == "helloworld"
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end
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end

‎test/test_helper.exs

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ExUnit.start()

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