@tidyjs/tidy/dist/es/mutate.js

Tidy up your data with JavaScript, inspired by dplyr and the tidyverse

function mutate(mutateSpec) {
  const _mutate = (items) => {
    const mutatedItems = items.map((d) => ({...d}));
    let i = 0;
    for (const mutatedItem of mutatedItems) {
      for (const key in mutateSpec) {
        const mutateSpecValue = mutateSpec[key];
        const mutatedResult = typeof mutateSpecValue === "function" ? mutateSpecValue(mutatedItem, i, mutatedItems) : mutateSpecValue;
        mutatedItem[key] = mutatedResult;
      }
      ++i;
    }
    return mutatedItems;
  };
  return _mutate;
}

export { mutate };
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