Comparison Type

Represents a comparison operation, which can be a predefined comparison type or a custom function.

The Comparison type allows for different ways to compare two values:

'equals': A deep comparison using the equals function from the package ‘@bitfiber/utils’.
'strict': A strict equality comparison, using strict equality (===).
((a: any, b: any) => boolean): A custom comparison function that takes two arguments and returns a boolean indicating whether the values are considered equal based on the provided logic

API

type Comparison = 'equals' | 'strict' | ((a: any, b: any) => boolean);

Example

import {state, changeDefaultComparison} from '@bitfiber/rx';
 
const data1 = state<number>(10, s => s
  // Uses the `equals` function from the package '@bitfiber/utils' for comparing values
  // this comparison is by default
  .compareBy('equals'));
 
const data2 = state<number>(10, s => s
  // Uses '===' for comparing values
  .compareBy('strict'));
 
const data3 = state<number | string>(10, s => s
  // Uses a custom function for comparing values
  .compareBy((a, b) => Number(a) === Number(b)));
 
// By default, uses the `equals` function for comparing values.
// To set a different comparison type for all states by default, use this function
changeDefaultComparison('strict');

tap changeDefaultComparison