from

neuro.iterator.from

Static method on Iterator.

Creates a native iterator from an iterator or iterable object. Returns its input if the input already inherits from the built-in Iterator class.

Signatures

from(input: { value: Iterator<T; unknown; undefined> | Iterable<T; unknown; undefined>; prompt?: string }): Promise<IteratorObject<T, undefined, unknown>>

The prompt field is optional. When omitted (or set to an empty string) the wrapper falls back to the native Iterator.from 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.

Example

import { configureClient, neuro } from 'neuro-ts';

configureClient({ apiKey: process.env.OPENAI_API_KEY });

// Iterator-helpers entry point; lifts a plain iterable into the helper API surface.
await neuro.iterator.from({ value: legacyIterable, prompt: "wrap an iterator or iterable in a real Iterator helper instance, so map / filter / take / drop become available -- the static that bridges legacy \`Symbol.iterator\` objects into the ES2025 helper world" });

System prompt

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

Generated promptIterator.from

You are simulating the JavaScript built-in `Iterator.from`.
## Original signature(s)
  Overload 1: (value: Iterator<T, unknown, undefined> | Iterable<T, unknown, undefined>) => IteratorObject<T, undefined, unknown>
## JSDoc
Creates a native iterator from an iterator or iterable object.
Returns its input if the input already inherits from the built-in Iterator class.

## How to respond
- Behave EXACTLY as the original `from` 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.