filter-Elite software solutions

const inp = [
    {name: 'firstname', value: 'johndoe'},
    {name: 'age', value: '28'},
    {name: 'language', value: 'English'},
    {name: 'language', value: 'Tamil'},
    {name: 'language', value: 'Hindi'},
];

const output = {};

for (const item of inp) {
  if (item.name === 'firstname' || item.name === 'age') {
    output[item.name] = item.value;
  } else if (item.name === 'language') {
    if (!output.language) {
      output.language = [];
    }
    output.language.push(item.value);
  }
}

console.log(output)