Дмитрий

const data = [
  {"prop":{"color":{"value":10},"diametr":{"value":15},"size":{"value":2}},"name":"результат 1"},
  {"prop":{"color":{"value":15},"diametr":{"value":17},"size":{"value":8}},"name":"результат 2"},
  {"prop":{"color":{"value":19},"diametr":{"value":17},"size":{"value":8}},"name":"результат 3"}
]

const search = filter => 
  Object.entries(filter).reduce((agg, [key, value]) => 
    agg.filter(v => v.prop[key].value === value)    
  , data)


console.log(search({ size: 8 }).map(v => v.name)) // ["результат 2", "результат 3"]
console.log(search({ size: 8, color: 15 }).map(v => v.name)) // ["результат 2"]

let Permissions = {canView: "True", canEdit: "False", canPrint: "True"};
function Count() {
  let count = 0;
  for (let elem of Object.values(Permissions)) {
    if (elem === "True") count++;
  }
  alert(count);
}

const Permissions = {canView: "True", canEdit: "False", canPrint: "True"};
const count = Object.values(Permissions).filter(v => v == "True").length
alert(count)

let data = ['Zna4', 'Zna4', 'Zna4'];
let people = ["Tom", "Alice", "Sam"];

data['image'] = people

if (todo.id === id) return { ...todo, completed: !todo.completed }
return todo

onChange={() => props.handleChange(props.item.id, !props.item.completed)}

handleChange(id, newCompleted) {
      this.setState(prevState => {
        
          const updatedTodos = prevState.todos.map(todo => {
              if (todo.id === id) {
                todo.completed = newCompleted 
              }
              return todo
          })
          return {
              todos: updatedTodos
          }
      })

const selector = "li.volga span"
const txt = "волга" 
const elem = Array.from(document.querySelector(selector)).find(v => v.innerText.includes(txt))

const map = Object.assign({} , ...arr.map(v => 
  ({ [v.id]: Object.assign(v, { children: [] }) })
))

const tree = Object.values(map).filter(v => 
 !(v.parent && map[v.parent].children.push(v))
)

const mapIds = {}
const filtered = array.filter(elem => {
  const existingElement = mapIds[elem.id]
  if (!existingElement) 
    mapIds[elem.id] = elem
  else  
    existingElement.array1.push(...elem.array1)

  return !existingElement
})

const mapIds = {}
const filtered = array.filter(elem => 
  (!mapIds[elem.id] && (mapIds[elem.id] = elem)) || !mapIds[elem.id].array1.push(...elem.array1)
)

for (const input of document.querySelectorAll('input'))
  input.addEventListener('input', функция)