Description
Advance a supplied zero-based scanning index with exact signed wrap count.
Activity and assistive-task records distinguish planned, attempted, completed, assisted, observed, and optional components. Shares depend on the selected denominator and credit policy. A supplied code, geometry, or time-budget calculation is separate from evaluating an individual's function or safe access.
Advance a supplied zero-based scanning index with exact signed wrap count.
When to use this tool
Use Assistive Switch Scan Wrap Token when you need this specific task-count, assistance-code, timing, equipment-budget, or participation-record component.
How to use the tool and how it works
- Enter currentIndex, advance, cellCount. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read nextIndex, wraps. Use the output convention below.
For positive integer cellCount and a valid currentIndex use exact integer arithmetic for currentIndex+advance and Euclidean division by cellCount. Return nextIndex as a nonnegative remainder and wraps as the signed quotient.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| currentIndex | Current Index | Required. Safe integer; minimum 0. |
| advance | Advance | Required. Safe integer. |
| cellCount | Cell Count | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| nextIndex | Next Index | Required. Safe integer. |
| wraps | Wraps | Required. Safe integer. |
{
"input": {
"currentIndex": 7,
"advance": 4,
"cellCount": 10
},
"output": {
"nextIndex": 1,
"wraps": 1
}
}Limitations and assumptions
- Indices are zero-based and advance can be negative. This models a cyclic index only, without an actual scanning interface, selection event, accessibility assessment, or timing prediction.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the intended assessment and a complete task or access model when a local check is insufficient. Verify task definitions, credit policies, measurement units, and the context of the underlying observations.
References
Similar or alternative tools
- Assistive Switch Scan Selection Time
Selection delay from a zero-based scan target and explicit completed cycles.
- Nurse Training Skill Station Rotation
Assign cyclic training stations under supplied station and round counts.