Function valueOrProviderResult

Resolves a value that was provided via ValueOrProvider

Can be called with optional args which will be used as arguments when calling the Provider Function.

Example

Create a Function that accepts a value that can be either lazy and eager inizialized

function fn(value: ValueOrProvider<string>) {
  // ... some code that may return early from the Function ...

  // resolve the value when it is actually needed
  const actualValue = valueOrProviderResult(value);
  console.log(typeof actualValue); // 'string'
}

Call the Function with an eager initialized value

fn(1);

Call the Function with a lazy initialized value

function someExpensiveOperation() { /* ... */ }

fn(someExpensiveOperation);

Example

Create a Function that accepts a value that can be either static or dynamic

function add(numbers: number[], value: ValueOrProvider<number, [number]>) {
  return numbers.map(n => n + valueOrProviderResult(value, e));
}

Call the Function with a static value

const a = add([1,2,3], 1);
console.log(a); // [2,3,4]

Call the Function with a dynamic value

const a = add([1,2,3], n => 2+n);
console.log(a); // [4,6,8]

Returns

the result of the Function if value is a Function, otherwise returns value itself