## Detect all Arabic Characters: ##

`/[\u0600-\u06ff]|[\u0750-\u077f]|[\ufb50-\ufbc1]|[\ufbd3-\ufd3f]|[\ufd50-\ufd8f]|[\ufd92-\ufdc7]|[\ufe70-\ufefc]|[\uFDF0-\uFDFD]/`

## Summary: ##
``` ruby  
  Arabic (0600—06FF, 225 characters)

  Arabic Supplement (0750—077F, 48 characters)

  Arabic Extended-A (08A0—08FF, 39 characters)

  Arabic Presentation Forms-A (FB50—FDFF, 608 characters)

  Arabic Presentation Forms-B (FE70—FEFF, 140 characters)

  Rumi Numeral Symbols (10E60—10E7F, 31 characters)

  Arabic Mathematical Alphabetic Symbols (1EE00—1EEFF, 143 characters)
```

For more info check this Wiki link to see arabic letters in Unicode:

https://en.wikipedia.org/wiki/Arabic_(Unicode_block)


### References:
http://stackoverflow.com/questions/11323596/regular-expression-for-arabic-language