nGene Regular Expression Builder

nGene Regular Expression Builder v 1.1 (b)

Compose

Sample text


  


  
  

  
  

    How to use
    
    
      
  1. Open re.html in a modern browser.
    2. 
      
  2. Type or paste a pattern, choose flags, and enter sample text.
    3. 

      
  3. 
        
    ISO‑date locator 🗓️
    
        
      
          
    1. Pattern: \b\d{4}-\d{2}-\d{2}\b
      2. 
          
    2. Flag:  g
      3. 
          
    3. Sample :
      4. 
          
      Agenda items due by 2025-05-12.
Previous deadline was 1999-12-31.
      
        
    
      
    4. 

      
  4. 
        
    E‑mail extractor ✉️
    
        
      
          
    1. Pattern: [\w.+-]+@[\w.-]+\.[A-Za-z]{2,}
      2. 
          
    2. Flag:  gi
      3. 
          
    3. Sample :
      4. 
          
      Contact Support@nGene.org for assistance.
      
        
    
      
    5. 

      
  5. 
        
    Clipboard buttons 📋
    
        
      
          
    • Copy pattern – copies the field unchanged.
      • 
          
    • Copy escaped pattern – doubles back‑slashes (for code).
      • 
        
    
      
    6. 
    

  


 
  
  

    Token reference
    

      

        
TokenDescription

        
          
.Any character except newline

          
\dDigit 0‑9

          
\wWord character

          
\sWhitespace

          
[abc]a, b or c

          
[^abc]Not a, b or c

          
*0 or more

          
+1 or more

          
?0 or 1

          
{m,n}Range quantifier

          
^Start anchor

          
$End anchor

          
(…)Capturing group

          
(?:…)Non‑capturing group

          
|Alternation

        
      

    

  


  
  

    Flag reference
    

      

        
FlagPurpose

        
          
gGlobal – find every match

          
iIgnore case

          
mMultiline anchors

          
sDotall – . matches newline

          
uUnicode mode

          
ySticky – start at lastIndex

        
      

    

  



  
  

    Get an OpenAI API key
    
    
      
  1. Step 1 – Create / sign in
    
          Visit https://platform.openai.com/, sign up or log in, and complete any verification.
    2. 
      
  2. Step 2 – Open API Keys
    
          Click your avatar (top‑right) → API Keys.
    3. 
      
  3. Step 3 – Create key
    
          Press + Create new secret key, name it (e.g. “nGene regex”), click Create, then copy it immediately.
    4. 
      
  4. Step 4 – Secure it
    
          Store the key safely (password manager / env var). Never commit it to public code.
    
          
    $ export OPENAI_API_KEY="sk-…"
    
          
    PS> setx OPENAI_API_KEY "sk-…"
    5. 
      
  5. Step 5 – Verify
    
          Test with curl (or any SDK):
    

    curl https://api.openai.com/v1/models \
  -H "Authorization: Bearer $OPENAI_API_KEY"
    
          A JSON list of models confirms the key works.
    6. 
    

  


  
  

    Full Source Code (re.html)