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Substr Javascript action

The substr method extracts parts of a string, beginning at the character at the specified position, and returns the specified characters.

Tip: To extract characters from the end of the string, use a negative start number.

Inputs

value

Required What to substring.

start

Required The position where to start the extraction. First character is at index 0.

• If start is positive and greater than, or equal, to the length of the string, substr() returns an empty string.
• If start is negative, substr() uses it as a character index from the end of the string.
• If start is negative or larger than the length of the string, start is set to 0.

length

The number of characters to extract. If omitted, it extracts the rest of the string.

Outputs

result

A new String, containing the extracted part of the text. If length is 0 or negative, an empty string is returned.

Example usage

uses: web3j/substr-action@v1.2
with:
  value: 'Mona the Octocat'
  start: '9'

Result: Octocat