This document explains the Find And Replace node, which allows you to search for and replace specific words, phrases, or patterns within text content.

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Node Inputs

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Required Fields

  • Input: The text content that will be processed for replacements
  • Replacements: A list of find/replace pairs to apply, with each pair containing:
    • Find word: The text to search for
    • Replace with: The text to use as replacement

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Node Output

  • Output Text: The resulting text after all replacements have been applied

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Node Functionality

The Find And Replace node searches for specific words, phrases, or patterns in text and replaces each occurrence with new text. It processes multiple replacements in a single operation, making it efficient for batch text editing tasks. Key capabilities include:
  • Multiple replacements in one operation
  • Support for exact match replacements
  • Basic regular expression pattern matching (limited support)

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When to Use

The Find And Replace node is particularly valuable in scenarios requiring text transformation and standardization. Common use cases include:
  • Content Updating: Replace outdated terminology with current terms
  • Data Cleaning: Remove or replace unwanted characters and formatting
  • Text Standardization: Ensure consistent terminology across documents
  • Template Customization: Replace placeholder text with personalized content
  • Format Conversion: Transform data from one format to another
Some specific examples:
  • Replacing product names across marketing materials
  • Standardizing date formats in exported data
  • Removing sensitive information from documents
  • Converting between US and UK English spelling
  • Replacing placeholders like {{name}} with actual customer names

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Using Regular Expressions

The Find And Replace node supports basic regular expressions (regex) for pattern matching. When using regex:
  • Regular expression patterns must be wrapped in forward slashes (/pattern/) with any flags at the end
  • Without the proper slashes, the node will treat the pattern as literal text

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Limitations

  • Capture groups are not supported: While regex patterns can match text, you cannot use capture groups ($1, $2, etc.) in the replacement text
  • For complex regex replacements with capture groups, use the Run Code node or the custom node feature with Python instead

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Working Regex Examples

  1. Case-Insensitive Matching
Input text: "I like eating apples and APPLE pie"
Find word: /apple/i
Replace with: "orange"
Output: "I like eating oranges and orange pie"
Pattern explanation: The 'i' flag makes the pattern match regardless of case
  1. Clean Up Extra Spaces
Input text: "Product    Name:     iPhone    14"
Find word: /\s{2,}/g
Replace with: " "
Output: "Product Name: iPhone 14"
Pattern explanation: \s matches any whitespace, {2,} means 2 or more occurrences
  1. Remove HTML Tags
Input text: "<p>Hello <strong>world</strong>! This is <em>important</em>.</p>"
Find word: /<[^>]*>/g
Replace with: ""
Output: "Hello world! This is important."
Pattern explanation: < matches opening bracket, [^>]* matches any character except >, > matches closing bracket
  1. Redact Phone Numbers
Input text: "Call me at (555) 123-4567 or (999) 888-7777"
Find word: /\(\d{3}\) \d{3}-\d{4}/g
Replace with: "[REDACTED]"
Output: "Call me at [REDACTED] or [REDACTED]"
Pattern explanation: \( matches literal parenthesis, \d{3} matches exactly 3 digits
  1. Remove Line Breaks
Input text: "First line\nSecond line\r\nThird line"
Find word: /\r?\n/g
Replace with: " "
Output: "First line Second line Third line"
Note: Removes all line breaks (both \n and \r\n) and replaces with spaces
Pattern explanation: \r? matches optional carriage return, \n matches newline

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Common Regex Flags

  • i: Case-insensitive matching
  • g: Global matching (replace all occurrences)
  • s: Dotall mode (makes . match newlines)
  • m: Multiline mode (makes ^ and $ match line boundaries)

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Loop Mode Pattern

Input: List of customer emails with placeholders
Process: Replace standard placeholders with personalized information
Output: List of personalized emails ready to send

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Alternative for Complex Replacements

For more advanced regex operations, especially those requiring capture groups, use the Run Code node with Python: 
import re

# Example: Convert date format using capture groups
text = "Date: 12-31-2023"
result = re.sub(r'(\d{2})-(\d{2})-(\d{4})', r'\3-\1-\2', text)
# Output: "Date: 2023-12-31"

return result

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Important Considerations

  1. Replacements are processed in the order they are defined
  2. Multiple replacements can interfere with each other if not planned carefully
  3. Case-sensitive by default (use regex with ‘i’ flag for case-insensitive)
  4. Regex patterns require proper slashes (/pattern/) to be interpreted correctly
  5. Capture groups are not supported - use the Run Code node or the custom node feature with Python instead
  6. For multiline text operations, use the ‘s’ flag to make ’.’ match newlines

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Troubleshooting Common Issues

IssueSolution
Regex not workingEnsure pattern is wrapped in /pattern/ with proper flags
Capture groups not workingUse Run Code node with Python regex instead
Multiline text not matchingAdd ‘s’ flag: /pattern/s
Case sensitivity issuesAdd ‘i’ flag: /pattern/i
Only first match replacedAdd ‘g’ flag: /pattern/g
In summary, the Find And Replace node is a powerful text manipulation tool for basic to moderate text processing needs. For advanced regex operations requiring capture groups, consider using the Run Code node with Python for full regex functionality.