vrl 0.32.0

Vector Remap Language
Documentation 
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{
  "anchor": "find",
  "name": "find",
  "category": "String",
  "description": "Determines from left to right the start position of the first found element in `value` that matches `pattern`. Returns `-1` if not found.",
  "arguments": [
    {
      "name": "value",
      "description": "The string to find the pattern in.",
      "required": true,
      "type": [
        "string"
      ]
    },
    {
      "name": "pattern",
      "description": "The regular expression or string pattern to match against.",
      "required": true,
      "type": [
        "string",
        "regex"
      ]
    },
    {
      "name": "from",
      "description": "Offset to start searching.",
      "required": false,
      "type": [
        "integer"
      ],
      "default": "0"
    }
  ],
  "return": {
    "types": [
      "integer"
    ]
  },
  "examples": [
    {
      "title": "Match text",
      "source": "find(\"foobar\", \"bar\")",
      "return": 3
    },
    {
      "title": "Match text at start",
      "source": "find(\"foobar\", \"foo\")",
      "return": 0
    },
    {
      "title": "Match regex",
      "source": "find(\"foobar\", r'b.r')",
      "return": 3
    },
    {
      "title": "No matches",
      "source": "find(\"foobar\", \"baz\")",
      "return": null
    },
    {
      "title": "With an offset",
      "source": "find(\"foobarfoobarfoo\", \"bar\", 4)",
      "return": 9
    }
  ],
  "pure": true
}