All files / utils/src/guards index.ts

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export const isNumber = (value: unknown): value is number => {
  return typeof value === 'number' && !Number.isNaN(value);
};
 
export const isString = (value: unknown): value is string => {
  return typeof value === 'string';
};
 
export const isDefined = <T>(value: T | undefined | null): value is T => {
  return value !== undefined && value !== null;
};
 
export const isObject = (value: unknown): value is Record<string, unknown> => {
  return typeof value === 'object' && value !== null && !Array.isArray(value);
};