回答編集履歴
2
追記
test
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@@ -1,15 +1,43 @@
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1
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１．JSONと正規表現を使った方法
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2
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+
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1
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とりあえず、id と
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3
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とりあえず、idName と code と Numが隣接していて常にこの順番で並んでいるという前提になりますが、
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2
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```js
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const json = JSON.stringify(bbb);
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const re = /"id":(
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const re = /"idName":"(.+?)","code".+?,"Num":(\d+)/gm;
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7
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const table = {};
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8
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for (let p; p = re.exec(json);) {
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table[p[1]] = p[2];
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}
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12
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aaa = aaa.map(e => ({ ...e, "
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aaa = aaa.map(e => ({ ...e, "Num" : table[e.idName] ?? '' }));
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-
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console.log(aaa)
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```
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---
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17
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18
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２．再帰を使った方法
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19
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20
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こちらは順番に依存しません。(読みやすさの観点からあえて reduce等 は使っていません)
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```js
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15
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-
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const table = {};
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function scan(obj) {
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if (obj instanceof Array) {
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obj.forEach(e => scan(e));
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} else {
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Object.keys(obj).forEach(p => {
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if (p == 'idName' && obj.hasOwnProperty('Num')) {
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table[obj['idName']] = obj['Num'];
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}
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32
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if (obj[p] instanceof Object || obj[p] instanceof Array) {
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scan(obj[p]);
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}
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});
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}
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}
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scan(bbb);
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aaa = aaa.map(e => ({ ...e, "Num" : table[e.idName] ?? '' }));
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console.log(aaa);
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43
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```
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1
test
CHANGED
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@@ -4,7 +4,7 @@
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4
4
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const re = /"id":(\d+)\,"str":"(.+?)"/gm;
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const table = {};
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6
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7
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for (let p; p = re.exec(json);
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for (let p; p = re.exec(json);) {
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table[p[1]] = p[2];
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}
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10
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