@echelon-framework/functions-core

Built-in pure functions for computed datasources in Echelon framework.

Part of the Echelon Framework — Angular-based, config-driven dashboard & low-code platform.

Installation

npm install @echelon-framework/functions-core

Usage

import { coreFunctions } from '@echelon-framework/functions-core';

provideEchelon({
  functions: [...coreFunctions, ...myCustomFunctions],
});

Available functions

| Function | Inputs | Output | Description | | ----------- | -------------------- | ------ | ------------------------- | | count | array | number | Array length | | filter | array, predicate | array | Filter items | | search | array, query, fields | array | Text search across fields | | paginate | array, page, size | array | Slice for pagination | | pickById | array, id, idField | object | Find by primary key | | mergeRow | array, item, idField | array | Upsert item in array | | formatPln | number | string | Format as PLN currency | | addLp | array | array | Add sequential lp field | | sum | array, field | number | Sum numeric field |

Custom functions

import { PureFunction } from '@echelon-framework/runtime';

@PureFunction({
  description: 'Compute dealer rate from spot + margin',
  inputs: [
    { name: 'spot', type: '{bid,ask}' },
    { name: 'marginPips', type: 'number' },
  ],
  output: { type: 'number' },
})
export class ComputeDealerRate {
  static fn(spot: { bid: number; ask: number }, marginPips: number): number {
    return +(spot.ask + marginPips * 0.0001).toFixed(5);
  }
}

License

BUSL-1.1