prefix

The prefix operation adds a predefined value in front of the input value. The prefix is defined in the Output field of the operation settings.

How it works

• You specify a prefix string (e.g. “ID-“).
• When the operation runs, this string is placed at the beginning of the input value.
• The original value is kept intact, only extended with the prefix.

Examples

Usage in PalDock

Use prefix when you need to:

• Add identifiers to values (e.g. ID-123).
• Attach country codes to phone numbers (e.g. +420 before the local number).
• Add tags or markers to values before sending them to an API.
• Standardize values across multiple sources by giving them a consistent prefix.
• Most commonly: prepend the string “Bearer ” to a Base64 token or JWT when setting up Authorization headers in API requests.

Best Practices

• Keep prefixes consistent — e.g. use the same tag across all IDs of a certain type.
• Combine prefix with conditions to only apply it in specific cases (e.g. only add +420 if no prefix is present).
• Be mindful of APIs that might reject duplicate or unexpected prefixes.