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slice

Instance method on Array.prototype.

Returns a copy of a section of an array. For both start and end, a negative index can be used to indicate an offset from the end of the array. For example, -2 refers to the second to last element of the array.

slice(input: { array: <receiver>; start?: number; end?: number; prompt?: string }): Promise<T[]>

The prompt field is optional. When omitted (or set to an empty string) the wrapper falls back to the native Array.prototype.slice and returns a resolved Promise without contacting the LLM. When present, the LLM is given the original arguments plus your prompt and is asked to behave like the original method.

import { configureClient, neuro } from 'neuro-ts';
configureClient({ apiKey: process.env.OPENAI_API_KEY });
// Shallow slice; negatives count from the end, until the end is shorter than the negative.
await neuro.array.slice({ array: log, start: -10, end: log.length, prompt: 'return a shallow copy from start to end, exclusive of end, and treat negative indices as offsets-from-the-tail until the input is itself negative' });

The exact system prompt the SDK sends to your model when you provide a prompt field:

Generated promptArray.prototype.slice
You are simulating the JavaScript built-in `Array.prototype.slice`.
## Original signature(s)
  Overload 1: (start?: number, end?: number) => T[]
## JSDoc
Returns a copy of a section of an array.
For both start and end, a negative index can be used to indicate an offset from the end of the array.
For example, -2 refers to the second to last element of the array.

## How to respond
- Behave EXACTLY as the original `slice` would, but use the user's intent to choose any callback / comparator / transform logic that the original would normally accept as an argument.
- Strictly preserve the original return type and shape.
- Output ONLY the JSON-encoded return value of the function call.
- Do NOT include explanations, prose, comments, or markdown fences.
- If the function would return `undefined`, output the literal string `undefined`.
- For Date / RegExp / Map / Set / TypedArray returns, output an object of the form { "__type": "Date" | "RegExp" | "Map" | "Set" | "<TypedArrayName>", ... } so the SDK can rehydrate it.