I have a list :
[{item:'apple',quantity:5},{item:'banana',quantity:3}]
I also have another list :
[{category:'fruit',id:3435},{category:'vegetable',id:3}]
My goal is to create :
[{newItem:'banana',newId:3}]
I am looking for a solution in JavaScript using the lodash library.
One approach is to create a hash table using the first array and utilize it while iterating through the second array.
const arr1 = [{ name: 'example', id: 1 }, { name: 'sample', id: 3 }],
arr2 = [{ type: 'example', uid: 3435 }, { type: 'sample', uid: 3 }],
hashTable = Object.create(null),
matches = [];
arr1.forEach(function (item) {
hashTable[item.id] = item;
});
arr2.forEach(function (item) {
if (hashTable[item.uid]) {
matches.push({ newname: item.type, uidid: item.uid });
}
});
console.log(matches);If you need an array with objects that have different key names, this code snippet could be exactly what you're looking for. It's designed to be easy to understand and doesn't involve any complicated syntax or logic.
var arr1 = [{name: 'blah', id: 1}, {name: 'blah2', id: 3}];
var arr2 = [{type: 'blah', uid: 3435}, {type: 'blah2', uid: 3}];
var arr3 = [];
arr1.forEach(function(obj1, i) {
arr2.forEach(function(obj2) {
if (obj1.id == obj2.uid) {
arr3.push({newname: obj1.name, uidid: obj1.id})
}
})
});
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