[英]Filtering and appending in JSON?
我在React中有一個JSON變量,如下所示:
var newTreeData_2 = {
name: current_name,
img: current_img,
uuid: uuid.v4(),
children: [
{
name: "Edit and save",
img:
"https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png",
uuid: uuid.v4()
},
{
name: "add a new one",
img:
"https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png",
uuid: uuid.v4()
}
]
};
每個uuid.v4()是唯一的ID。
我要做的是制作一個接受UUID的函數,並將一個新的對象children:[{}]
附加到UUID所在的位置。 例如,如果我的uuid與代碼段第10行上的uuid.v4()相匹配,則它應該附加一個JSON對象,因此最終結果如下所示:
var newTreeData_2 = {
name: current_name,
img: current_img,
uuid: uuid.v4(),
children: [
{
name: "Edit and save",
img:
"https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png",
uuid: uuid.v4(),
chilren: [{}]
},
{
name: "add a new one",
img:
"https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png",
uuid: uuid.v4()
}
]
};
據我了解,如果孩子的uuid等於給定的uuid,則想添加一個對象。
如果這是您想要的,則可以遍歷每個孩子,測試它的uuid是否等於給定的uuid,如果是,則添加[{}]
。
function addJSONObjct(obj, uuid) {
for (i = 0; i < obj.children.length; i ++) {
if (obj.children[i].uuid === uuid) {
obj.children[i].children=[{}];
}
}
}
此遞歸函數查找具有目標UUID的對象並將子代添加到其中
var newTreeData = { name: 'a', img: 'b', uuid: 1234, children: [{ name: "Edit and save", img: "https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png", uuid: 12345, children: [{ name: "Edit and save", img: "https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png", uuid: 123 }] }, { name: "add a new one", img: "https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png", uuid: 132456 } ] }; function findUUID(targetObject, uuid) { var children = targetObject.children; if (!!children === false) return; var target = children.filter(x => { if (x.uuid === uuid) return x; }); if (target.length === 0) { children.map(x => findUUID(x, uuid)); } else { if (!!target[0].children && target[0].children.length !== 0) { target[0].children.push({}); console.log(target); } else { target[0].children = [{}]; console.log(target); } } } findUUID(newTreeData, 132456);
我必須解決此問題的確切代碼:
findUUID(targetObject, uuid2, name, img, details) {
var targetIsFound = false;
var target = "";
console.log("Parent TreeData UUID" + targetObject.uuid);
console.log("UUID we are trying to match" + uuid2);
if (targetObject.uuid == uuid2) {
targetIsFound = true;
target = targetObject;
}
console.log(targetIsFound, target);
if (targetIsFound == false) {
console.log(
"About to start recursion, this is the target Object: ",
targetObject
);
if (targetObject.children === undefined) {
console.log("we should exit here");
} else {
targetObject.children.map(x => this.findUUID(x, uuid2));
}
} else {
if (target.name == "Edit and save") {
target.children = [
{
name: "Edit and save",
img:
"https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png",
uuid: uuid.v4()
},
{
name: "Edit and save",
img:
"https://cdn3.iconfinder.com/data/icons/harmonicons-06/64/plus-circle-512.png",
uuid: uuid.v4()
}
];
}
this.setState({ treeData: this.state.treeData });
console.log(this.state.treeData);
}
}
名稱,img和詳細信息僅是用於以匹配的uuid填充數據的參數。 我將匹配的uuid命名為“ uuid2”的原因是因為我導入了uuid程序包,並且可能存在沖突。
Jeff和Barzin的代碼有效,如果您的數據像我的一樣,則必須對Jeff的方法運行遞歸。 我的代碼與Barzin的代碼不同之處在於,我正在執行錯誤檢查:if(targetObject.children === undefined)以確保沒有其他可執行的操作時不繼續執行遞歸。 順便說一句,此方法假設我們要查找的UUID確實存在於targetObject中。
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