如何使用lodash在集合中查找特定结果？

Question

I am working on lodash ...I want to find particular array if matching id mind in that particular array...This is my collection:-

[ { name: 'Thor',
    id: 
     [ '5a1676da509a93571c15501f',
       '59ffb40f62d346204e09c9ad',
       '5a0a92e01bb28a276abfa548' ] },
  { name: 'Loki',
    id: 
     [ '59ffb40f62d346204e09c9ad',
       '59ffb41b62d346204e0a03ed',
       '59ffb40e62d346204e09c298',
       '5a65853af431924e73c401fe' ] } ]

What I am trying to find i have given id if it should find it above collection then it should return that collection...for example..if i have id:59ffb40e62d346204e09c298,then it should return 2 collection.....

b =  _.find(upperArray,(candidate) => {
            //  console.log(candidate)
           return _.find(candidate.id,id)//here actor_id is given id
            })

but it does not return 2 collection.If it does not found any matching element it should return blank array or if found it should return collection of array.Where I am doing wrong??

Answer 1

Using can achieve the same using native array methods

 var id = "59ffb40e62d346204e09c298"; var arr = [{ name: 'Thor', id: ['5a1676da509a93571c15501f', '59ffb40f62d346204e09c9ad', '5a0a92e01bb28a276abfa548' ] }, { name: 'Loki', id: ['59ffb40f62d346204e09c9ad', '59ffb41b62d346204e0a03ed', '59ffb40e62d346204e09c298', '5a65853af431924e73c401fe' ] } ] function getMatchedCollection(id) { // filter will return a new array of matched condition return arr.filter(function(item) { // indexOf is used to check if an element is present if (item.id.indexOf(id) !== -1) { return item } }) } console.log(getMatchedCollection(id)) 

Answer 2

@Barmar is correct you should use _.filter . Try the following

 var upperArray = [ { name: 'Thor', id: [ '5a1676da509a93571c15501f', '59ffb40f62d346204e09c9ad', '5a0a92e01bb28a276abfa548' ] }, { name: 'Loki', id: [ '59ffb40f62d346204e09c9ad', '59ffb41b62d346204e0a03ed', '59ffb40e62d346204e09c298', '5a65853af431924e73c401fe' ] } ]; function findById(idToFind) { return _.filter(upperArray,function(candidate) { return _.includes(candidate.id, idToFind); }); } var b = findById('59ffb40e62d346204e09c298'); console.log(b); 

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