回答編集履歴
5
修正後コード対応
test
CHANGED
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@@ -105,3 +105,139 @@
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105
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// こちらもいい感じの結果に
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```
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---
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【追記】 グループ分けしたオブジェクトへの対応版
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条件変わってますので再度考え直してみます。
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まぁ、オブジェクトはtoPairsを使って配列にしてしまえば消化試合です。
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キーに引っかかるグループが存在しなかった場合を考慮して、
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存在しないグループは一度filterで消し飛ばすというガードも組み込みました。
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```JavaScript
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const list = {
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'sports': [
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{identify: 'soccer', name: 'サッカー'},
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{identify: 'baseball', name: '野球'}
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],
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'nature': [
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{identify: 'animal', name: '動物'},
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{identify: 'flower', name: '花'}
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]
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};
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const groups = [
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{identify:'sports', id: 1},
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{identify:'nature', id: 2},
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];
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const make = (tmpList, groups) =>
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_(tmpList)
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.toPairs()
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.filter(([gname]) => _.find(groups, group => group.identify === gname))
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.map(([gname, items]) => {
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const group = _.find(groups, group => group.identify === gname);
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return _.map(items, it => ({...it, group_id: group.id}));
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})
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.flatten()
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.value()
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result = make(list, groups)
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```
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[https://codepen.io/travist/full/jrBjBz/](https://codepen.io/travist/full/jrBjBz/)にコピペすればちゃんと表示されることがわかります。
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結果:
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```JSON
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[
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{
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"identify": "soccer",
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"name": "サッカー",
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"group_id": 1
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},
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{
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"identify": "baseball",
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"name": "野球",
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"group_id": 1
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},
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{
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"identify": "animal",
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"name": "動物",
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"group_id": 2
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},
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{
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"identify": "flower",
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"name": "花",
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"group_id": 2
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}
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]
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```
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4
syntaxエラーを修正
test
CHANGED
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@@ -16,13 +16,37 @@
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.map(tmp =>
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_.map(groups, group => {...tmp, id: group.id})
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_.map(groups, group => ({...tmp, id: group.id}))
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)
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.flatten()
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.values()
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const users = [
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{ user: 'barney', age: 36, active: true },
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{ user: 'fred', age: 40, active: false },
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{ user: 'travis', age: 37, active: true}
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];
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const ids = [
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{ id: 123 },
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{ id: 234 }
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];
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console.log(make(users, ids));
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// いい感じにでました
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```
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@@ -46,7 +70,7 @@
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tmpList
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.map(tmp => groups.map(group => {...tmp, id: group.id}))
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.map(tmp => groups.map(group => ({...tmp, id: group.id})))
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.reduce((arr, items) => {
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@@ -56,4 +80,28 @@
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}, [])
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const users = [
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{ user: 'barney', age: 36, active: true },
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{ user: 'fred', age: 40, active: false },
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{ user: 'travis', age: 37, active: true}
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];
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const ids = [
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{ id: 123 },
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{ id: 234 }
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];
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console.log(make(users, ids));
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// こちらもいい感じの結果に
|
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106
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+
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59
107
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```
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3
tmp使ってなかった
test
CHANGED
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@@ -16,7 +16,7 @@
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.map(tmp =>
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_.map(groups, group => {...tmp
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_.map(groups, group => {...tmp, id: group.id})
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)
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@@ -46,7 +46,7 @@
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tmpList
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.map(tmp => groups.map(group => {...tmp
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.map(tmp => groups.map(group => {...tmp, id: group.id}))
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.reduce((arr, items) => {
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2
reduce使うルート間違ってるやん
test
CHANGED
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@@ -48,6 +48,12 @@
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.map(tmp => groups.map(group => {...tmpList, id: group.id}))
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.reduce((arr, items) => {
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.r
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items.forEach(it => { arr.push(it) });
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return arr;
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}, [])
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```
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1
おまけ追加
test
CHANGED
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@@ -25,3 +25,29 @@
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.values()
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```
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---
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【おまけ】
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36
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37
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38
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39
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reduce使うルートならネイティブJSでも出来そうなのでやりました。
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40
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42
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43
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```JavaScript
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44
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45
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const make = (tmpList, groups) =>
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tmpList
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.map(tmp => groups.map(group => {...tmpList, id: group.id}))
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50
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.reduce((arr, it) => { arr.push(it); return arr; }, [])
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53
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```
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