我很好奇是否有更短的方法来实现这个目标?
通过匹配某些属性来检查是否存在重复项,然后将重复的array.items推送到原始array.items
var array = [
{type: "Fruit", something: "abc", more: "properties", items: [{word:"Apple", abc: "ok"}]},
{type: "Fruit", something: "abc", more: "properties", items: [{word:"Orange", abc: "ok"}]}
];
merge(array)将成为
array = [
{type: "Fruit", something: "abc", more: "properties", items:[{word:"Apple", abc: "ok"}, {word:"Orange", abc: "ok"}]}
];
merge: function(arr) {
var rec, dupeIndices, foundDupes;
for (var idx = 0, len = arr.length; idx < len - 1; ++idx) {
rec = arr[idx];
if (rec === null) continue;
dupeIndices = findDupeIndices(rec, arr.slice(idx + 1), idx + 1);
if (dupeIndices.length === 0) continue;
foundDupes = true;
processDupes(rec, dupeIndices, arr);
}
if (foundDupes) cleanUp(arr);
},
cleanUp: function(arr) {
for (var idx = 0; idx < arr.length; ++idx) {
if (arr[idx] === null) arr.splice(idx--, 1);
}
},
processDupes: function(rec, dupeIndices, arr) {
var dupeRealIdx, dupeRec;
for (var dupeIdx = 0, dupesLen = dupeIndices.length; dupeIdx < dupesLen; ++dupeIdx) {
dupeRealIdx = dupeIndices[dupeIdx];
dupeRec = arr[dupeRealIdx];
updateRecord(rec, dupeRec);
arr[dupeRealIdx] = null;
}
},
findDupeIndices: function(rec, arr, offset) {
var other, result = [];
for (var idx = 0, len = arr.length; idx < len; ++idx) {
other = arr[idx];
if (other === null) continue;
if (isDupe(rec, other)) result.push(idx + offset);
}
return result;
},
isDupe: function(a, b) {
return (a.type === b.type && a.something === b.something);
},
updateRecord: function(rec, dupe) {
for (var i = 0; i < dupe.items.length; i++) {
rec.items.push(dupe.items[i]);
}
}
答案 0 :(得分:1)
您需要删除重复项吗?
var arr = [
{type: "Fruit", items:[{word:"Apple"}]},
{type: "Fruit", items:[{word:"Orange"}]}
];
var obj = arr.reduce(function(obj, i) {
obj[i.type] = [].concat(obj[i.type] || [], i.items); return obj;
}, {});
var res = [];
for (var key in obj)
res.push({type: key, items: obj[key]});
// or to unique items
// res.push({type: key, items: obj[key].filter(function (e, i, r) { return r.indexOf(e) == i})});
console.log(res);
答案 1 :(得分:1)
你可以使用一个对象帮助排序,这里我对类型进行排序并组合项目
var obj = [
{type: "Fruit", something: "abc", more: "properties", items: [{word:"Apple", abc: "ok"}]},
{type: "Fruit", something: "abc", more: "properties", items: [{word:"Orange", abc: "ok"}]}
];
var sorted = {};
obj.forEach(function(element){
if(sorted[element.type]){
sorted[element.type].items.push.apply(sorted[element.type].items,element.items)
}else{
sorted[element.type] = {
type: element.type,
something: element.something,
more: element.more,
items:element.items
}
}
});
var sortedarray = Object.keys(sorted).map(function(item){
return sorted[item]});
console.log(sortedarray);