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Introducing Regular Expressions

Regular Expressions (abbreviation: RegEx) are signs which built in an intelligent and easy to understand system. We have the ability to use this system in AlQuran.eu and improve our work much faster and even exactly. If users of OpenQuran doing research to the counts and calculations of Letters/words/verses and there gematrical values than its very important to understand the idea behind RegEx. RegEx is mostly used in programming languages, databases, search engines, Spam filters etc. It's easy to understand but needs from us more the artistic talent on how to build the RegEx definitions. There are also a lot of Sites which have more detailed informations on how to use this small powerful language, but the would like easily show how to use with the Arabic language and specially for the Quran.

The theoretical part

RegEx Meaning
. a dot replaces any sign like letter, number oder space
* a star after a sign means: this sign can exist even many times or it does not exist at all
.* The example finds this whole string
[a-z]* finding only small letters or none
(?i) finding small or capital letters
th.*s find th………….s
^A The text must begin with  A
s$ The text has to end with s
 
[a-z|A-Z] Only small or capitel letters
[^a-z] find none of these letters
[a1] find a or 1
[^abcd] find none of a b c or d
s|t s or t
M(e|i)*r (e or i) find: Mr, Mer, Meir, Mier or Mir
M(e|i)?r (e or  i) 1 same as befor but also find Miiiiieeeeer
a+ finds at least 1 a or many aaaaaaa…..
a{5} finds 5 times aaaaa
a{3,} a must be 3 times or more
a{,3} a exits 3 times or lesser
a{3,8} a must exist 3 to 8 times
w finds letter chars
\W finds no letter chars
\d finds only numbers [0-9]
\D finds no numbers
\s finds white space
\S finds no white space
\b sign/s limit \bword\b
\B sign/s ar not limited
\t tab
| or
\
[ ] contains many differt signs
( ) contains a group of sign/string
{x,y}

The practical part (Using in AlQuran)

choose the table quran which is automatically selected. Notic that the most confusing part in our work is by combinig arabic chars with latin signs. That´s why we´re forced to change the direction of the write method in some examples to be "RightToLeft" (RTL).
  • The orange colored expressions can be used in the search input (Click on the example to send to search).
  • The gray colored sentences are the result of our search
  • We can also check "analyze" instead of the normal searching. It shows detailed informations about the calculation.

Examples:


\w
This will count any letter found in the whole quran. (run Analyze "right click" instead of normal search. Cause OQ colorizes every sign to red)
326030 Entries (328158 with Basmalah/s* ), 6234 Verses in 114* Suras
^\w{7}\b
views verses which begin with a 7 letters word like ( واقيموا الصلوه ) in verse 2:43 //
304* Entries, 304* Verses in 77 Suras
\b\w{6}\b
views any word which consists of 6 letters
11163 Entries (11387 with Basmalah/s ), 4669 Verses in 112 Suras
^[\w| ]{19}ا
searches for Alif letter after counting 19 leters or spaces
710 Entries, 710 Verses in 95* Surahs
^(\w[ ]*){114}ا
searches for Alif letter after counting 114 letters (WITHOUT counting spaces) //
57* Entries, 57* Verses in 23 Suras

^الرحمن

find verses which begin with الرحمن
3 Entries, 3 Verses in 3 Suras. Count Sura Numbers: 76*

الرحيم$

find verses which end with الرحيم
33 Entries, 33 Verses in 19* Suras, count dura numbers 551*,  Letters count of all found verses 1444*

ل{2}

find all double لل
3253 Entries (3365 with Basmalah/s ), 2147* Verses in 96 Suras

[ب|س|م|ا|ل|ه|ر|ح|ن|ي]

find the letter B or S or M etc (letters of Basmalah)
221654* Entries (19*19*614) (223782* with Basmalah/s* ), 6234 Verses in 114* Suras, Count Sura Numbers: 6555*

[^ب|ج|د|و|ز|ف|ش|ت|ث|خ|ذ|ض|ظ|غ]

find any letter accept B or G or D etc.. (None initial letters)
315155 Entries (317507 with Basmalah/s ), 6234 Verses in 114* Suras
Searching for some unique words like Allh = الله
it´s important to have some knowledge about the different forms of this words. Some times its written LLH = لله or FALLH = فالله or BALLH = بالله or WLLH = ولله  but not DLLH = ضلله .
The best definition we found to get all words is as follow:

( |ا|و|ف|^)لله( |$)

2698* Entries (2810 with Basmalah/s ), 1820 Verses in 85 Suras
\bالقرءان\b
finds the word ALQRAAN exactly the way its written
43 Entries, 43 Verses in 28 Suras, Count Sura Numbers: 893*
\bكتب|كتاب\b
finds the word KTB or KTAB exactly the way they are written
102 Entries, 95* Verses in 45 Suras

(\b(ال|و|ف|ء|ب)*ا[ء]*له(ا|ك|كم|نا|ه|ين|ت|تهم|تي)*\b)|( |ا|و|ف|^)لله( |$)|اللهم

This one is a difficult example showing the roots of ALH اله in all different shapes used in the Quran
2849 Entries, 1878 Verses in 86 Suras

[^ع]ابدا

Here we need the word ABDA ابدا but without the letter ع before
28 Entries, 28 Verses in 15 Suras

ن[ ]*و[ ]*ن

This will find يمنون in one word or in 2 words beside each other بالسنين ونقص
247* Entries, 235 Verses in 65 Suras
To look for every verse which begins with a specific letter and ends with another specific letter we do as follow:
We search for verses that begin with Ba ب and ends with Mim م like the Basmalah (first verse in surah 1):

^ب.+م$

AlQuran finds 3 verses in such manner which consists of 114 (19*6) letters.
If we also search for verses that begin with Saad ص and end with Nun ن (last verse of surah 1)
we´ll find also 3 verses that have a gematrical value of 9728 (19*512):

^ص.+ن$

We can also include both mehtods in one definition!
For example we search for verses which begin with letter Be ب or Saad ص and end with Mim م or Nun ن :

^[ب|ص].+[م|ن]$

In such manner we find 46 verses which have the gematrical value of 130473 (19*6867)
If we want to look for all words which begin with a specific letter (e.g. the letter س ) \bس+
Some times letters have 2 or more different shapes like Alif and Hamza.
The following example will find all words begining with Alif or Hamza: \b[ا|ء]+
At the begining of the verse, there must be (a word with 3 letters) than (Space) than (ALLH). same as بسم الله

^\w{3} الله


References to Regular Expressions

If you have any question regarding RegEx in Alquran than we are glad to help.