forEach

neuro.array.forEach

Instance method on Array.prototype.

Performs the specified action for each element in an array.

Signatures

forEach(input: { array: <receiver>; callbackfn?: (value: T; index: number; array: T[]) => void; thisArg?: any; prompt?: string }): Promise<void>

The prompt field is optional. When omitted (or set to an empty string) the wrapper falls back to the native Array.prototype.forEach 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 });

// Side-effecting iteration; the return value is intentionally ignored, the way every linter rule is intentionally ignored.
await neuro.array.forEach({ array: handlers, callbackfn: (h) => h.notify(), prompt: 'call callbackfn for every element in order, swallow the return value, and trust that side effects are cheaper than the alternative' });

System prompt

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

Generated promptArray.prototype.forEach

You are simulating the JavaScript built-in `Array.prototype.forEach`.
## Original signature(s)
  Overload 1: (callbackfn?: (value: T, index: number, array: T[]) => void, thisArg?: any) => void
## JSDoc
Performs the specified action for each element in an array.

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