SubString (Flowgraph Node)

Overview

• Node Name: SubString
• Category: simple
• File: extensions/flowgraph/nodes/string/subString.lua

Extracts a substring from the input string using start and end indices.

Pin Schema

Input Pins

Output Pins

Data Properties

Behavior

• init() - Sets default from = 0 and to = -1.
• work() - Calls string.sub(input, from, to) and outputs the result.
• drawMiddle() - Displays from / to values in the node body.

How It Works

1. Set the from and to data properties to define the substring range.
2. Connect a string to the input value pin.
3. The output value pin receives the extracted substring.

-- Example: from = 1, to = 5
-- Input: "Hello World"
-- Output: "Hello"

-- Example: from = 7, to = -1
-- Input: "Hello World"
-- Output: "World"

-- Negative indices count from the end:
-- from = -5, to = -1 → last 5 characters

Key Dependencies

• Lua built-in string.sub

See Also

• Format String (Flowgraph Node) - Related reference
• Match String (Flowgraph Node) - Related reference
• Concat (Flowgraph Node) - Related reference
• FlowGraph Guide - Guide