I have this kind of dictionary: INPUT
movies = {
'big' : {
actors : ['Elizabeth Perkins', 'Robert Loggia']
},
'forrest gump' : {
actors : ['Tom Hanks', 'Robin Wright', 'Gary Sinise']
},
'cast away' : {
actors : ['Helen Hunt', 'Paul Sanchez']
}
};
and I want to use this dictionary to get a different one. For example, I have to make a function called "moviesWithActors" that will received two arguments: "movies" and "actor". Actor could be "Tom Hanks", so when you find that he was on the movie, you don't add to the nested array, but if wasn't, you add.
OUTPUT
movies = {
'big' : {
actors : ['Elizabeth Perkins', 'Robert Loggia', 'Tom Hanks']
},
'forrest gump' : {
actors : ['Tom Hanks', 'Robin Wright', 'Gary Sinise']
},
'cast away' : {
actors : ['Helen Hunt', 'Paul Sanchez', 'Tom Hanks]
}
};
I do this:
for (const value of Object.values(newMovies)){
console.log(value.actors)
for (const act of value.actors){
//console.log(act)
if (act == actor) {
console.log("Ok, not add")
}else{
console.log("Here I have to add");
}
}
}
where "newMovies" is a copy of "movies" and "actor = "Tom Hanks" but I can't add to the array in actors: [ ... ]. Any suggestion? Can I use map() ?
As per the requirement what I understood is that there is an existing array of movies object and you want to assign a hero in those movies. We have to ignore if the passed hero name is already there for that movie else add that hero under that movie. If my understanding is correct, Here you go :
const movies = {
'big' : {
actors : ['Elizabeth Perkins', 'Robert Loggia']
},
'forrest gump' : {
actors : ['Tom Hanks', 'Robin Wright', 'Gary Sinise']
},
'cast away' : {
actors : ['Helen Hunt', 'Paul Sanchez']
}
};
function updateMoviesList(obj, heroName) {
Object.keys(obj).forEach(key => {
if (!obj[key].actors.includes(heroName)) {
obj[key].actors.push(heroName)
}
})
return obj;
}
console.log(updateMoviesList(movies, 'Tom Hanks'));Like this from docs
let sports = ['soccer', 'baseball']
let total = sports.push('football', 'swimming')
console.log(sports) // ['soccer', 'baseball', 'football', 'swimming']
console.log(total.length) // 4
To access array inside dictionary you have first to access it
movies['big']['actors'].push('New Actor')
let actor = 'Tom Hanks'
for (const value of Object.values(newMovies)){
for (const act of value.actors){
if (value.actors.includes(actor)) { //Here you check if actor contains in array
console.log("Ok, not add")
}else{
console.log("Here I have to add");
value.actors.push(actor) //if not push to array
}
}
}
I was suggested to use map instead and the class Object...
function actorInMovies(movies, actor) {
let mappedObject = { ...movies};
Object.entries(movies).map(movie => {
const movieName = movie[0];
const actors = movie[1].actors;
if (!actors.includes(actor))
actors.push(actor);
mappedObject = {
...mappedObject,
[movieName]: { actors }
};
});
return mappedObject
}
function main(){
const movies = {
'big' : {
actors : ['Elizabeth Perkins', 'Robert Loggia']
},
'forrest gump' : {
actors : ['Tom Hanks', 'Robin Wright', 'Gary Sinise']
},
'cast away' : {
actors : ['Helen Hunt', 'Paul Sanchez']
}
};
const actor = 'Tom Hanks';
console.log(actorInMovies(movies, actor))
}
main();