let items = [
  {name: "something", value: true},
  // ...
];

// use reduce to build the new map into an accumulator
// we'll refer to this as "reduce mutate"
let result = items.reduce((acc, item) => {
  acc[item.name] = item.value;
  return acc;
}, {})

// equivalent as as a for loop
let result = {};
for(let item of items) {
  result[item.name] = item.value;
}