Matches regex pattern

Input

value

Validate that value matches pattern '^HELLO'

validation:

stringMatchesRegex

Ensure string field matches regex pattern

source:value

parameters

pattern

Regex pattern to match

Output

result
Pass
Pass
Pass
String field "value" does not match regex pattern "^HELLO"
String field "value" does not match regex pattern "^HELLO"
String field "value" does not match regex pattern "^HELLO"

* Sample inputs run locally in your browser using the same operation logic as Fontana Flow.
Results are illustrative, not connected to a workflow.

Ensure string field matches regex pattern.

Parameters

• pattern (string, required) — Regex pattern to match. Default: "".

Field selection

• source — Field whose values this operation reads. Omit to apply to all fields on the row.
• target — Optional output field. When omitted, the source field is updated in place.

JSON Configuration

{
  "id": "op-stringMatchesRegex",
  "type": "validation",
  "action": "stringMatchesRegex",
  "params": {
    "pattern": "^HELLO"
  },
  "testInputs": [
    "HELLO",
    "HELLO WORLD",
    "HELLO123",
    "123",
    "world",
    "12345"
  ]
}

Related

• required