Function flattenArray

modules/core/src/utils/flatten.ts:30–41

Deep flattens an array. Helper to `flatten`, see its parameters

(array: NestedArray<T>, filter: (element: T) => boolean, result: T[])

/** Deep flattens an array. Helper to `flatten`, see its parameters */
function flattenArray<T>(array: NestedArray<T>, filter: (element: T) => boolean, result: T[]): T[] {
  let index = -1;
  while (++index < array.length) {
    const value = array[index];
    if (Array.isArray(value)) {
      flattenArray(value, filter, result);
    } else if (filter(value)) {
      result.push(value);
    }
  }
  return result;
}

/** Uses copyWithin to significantly speed up typed array value filling */
export function fillArray({target, source, start = 0, count = 1}) {