Remove language specification from data

core.js

/** 
 const data = {
  firstName_en: "Iswan",
  lastName_en: "Jumat",
  age: 30
 }
 *
 const exprectedData = {
  firstName: "Iswan",
  lastName: "Jumat",
  age: 30
 }
*/
export const removeLanguageSpec = (data: Object) => {
  let keys = ["si", "en", "ta"];
  const findKeys = (data: string): any => {
    return keys.reduce((value, key) => {
      if (data.indexOf(`_${key}`) > -1) {
        return `_${key}`;
      }
      return value;
    }, -1);
  };
  Object.keys(data).reduce((obj, item) => {
    const findKey = findKeys(item);
    if (findKey !== -1) {
      const removedKey = item.split(findKey);
      return {
        ...obj,
        [removedKey[0]]: data[item]
      };
    }
    return {
      ...obj,
      [item]: data[item]
    };
  }, {});
};