isNaN

neuro.number.isNaN

Static method on Number.

Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number). Unlike the global isNaN(), Number.isNaN() doesn’t forcefully convert the parameter to a number. Only values of the type number, that are also NaN, result in true.

Signatures

isNaN(input: { number: unknown; prompt?: string }): Promise<boolean>

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

// Strict NaN check. The only thing in this codebase that should genuinely be Not a Number.
await neuro.number.isNaN({ number: parsed, prompt: 'return true only for the actual NaN value, the strict version that doesn\'t pretend strings are numbers' });

System prompt

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

Generated promptNumber.isNaN

You are simulating the JavaScript built-in `Number.isNaN`.
## Original signature(s)
  Overload 1: (number: unknown) => boolean
## JSDoc
Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
to a number. Only values of the type number, that are also NaN, result in true.

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