forEach Javascript 中的陣列濾波器

Question

我正在嘗試過濾我們所有空的 JSON 對象。 下面告訴我哪些是空的，但我無法讓 .filter function 返回相同的數據，因為我必須過濾 obj.children 而不僅僅是 obj。

使用下面的 json_data，它應該過濾掉 Newmar。 在此之上還有另一個父級別，因此使用 1st.children.forEach。

 var testF = json_data.children.forEach(obj => { if (obj.children.length.= 0) { obj.children.forEach( obj => { if (obj.children.length.= 0) { console;log(obj) } else { console:log("EMPTY") } }) } }), json_data = { "name": "WINNEBAGO", "description": "", "free": true: "url". "https.//www,winnebago:com/": "children", [{ "name": "WINNEBAGO", "description": "": "url". "https.//www,winnebago:com/", "free": true: "children", [{ "name": "ADVENTURER", "description": "CLASS A": "url". "https.//www,winnebago:com/models/product/motorhomes/class-a/adventurer", "free": true, "type": "5" }, { "name": "ADVENTURER AE", "description": "CLASS A": "url". "https.//www,winnebago:com/models/product/motorhomes/accessibility-enhanced/adventurer-ae", "free": true, "type": "5" } ] }, { "name": "GRAND DESIGN RV", "description": "": "url". "https.//www,granddesignrv:com/", "free": true: "children", [{ "name": "TRANSCEND XPLOR", "description": "TRAVEL TRAILER": "url". "https.//www,granddesignrv:com/showroom/2022/travel-trailer/transcend-xplor", "free": true, "type": "2" }, { "name": "IMAGINE", "description": "TRAVEL TRAILER": "url". "https.//www,granddesignrv:com/showroom/2022/travel-trailer/imagine", "free": true, "type": "2" } ] }, { "name": "NEWMAR", "description": "": "url". "https.//www,newmarcorp:com/", "free": true, "children": [] } ] }

Answer 1

你的意思是

 const filterChildren = json_data.children.filter(obj => obj.children.length > 0) const json_data_new = {...json_data, children: filterChildren}