arrayBulkDelete.js

// In-place mutation
export function arrayBulkDelete (array, valueOrPredicate) {
  const { length } = array,
        predicate = typeof valueOrPredicate === "function"
          ? valueOrPredicate
          : (x) => x === valueOrPredicate,
        indicesToDelete = [];

  let lastIndex = -2;

  for (let i = 0; i < length; ++i) {
    if (predicate(array[i], i)) {
      if (i - 1 === lastIndex) // consecutive
        indicesToDelete[indicesToDelete.length - 1][1] = i;
      else
        indicesToDelete.push([i, i]);

      lastIndex = i;
    }
  }

  if (lastIndex === -2)
    return;

  for (let i = indicesToDelete.length - 1; i >= 0; --i) {
    const [ start, end ] = indicesToDelete[i];
    array.splice(start, end - start + 1);
  }
}