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[英]Converting a regular json file to a parent-child hierarchical json as used by d3 flare.json
[英]Convert flat JSON file to hierarchical json data like flare.json [d3 example file]
經過一場麻煩的戰斗后,我幾乎想到了如何將平面json文件轉換為Hierarchical文件。 我沒有自己寫這個功能。 我從下面的帖子中復制了它。
但現在問題是,在帖子中寫的函數只有2級層次結構。 但我正在尋找4級層次結構。 我試圖覆蓋我失敗的功能但是。
代碼與我正在嘗試。
var data = [ { "dep": "First Top", "name": "First child", "model": "value1", "size": "320" }, { "dep": "First Top", "name": "First child", "model": "value2", "size": "320" }, { "dep": "First Top", "name": "First child", "model": "value3", "size": "320" }, { "dep": "First Top", "name": "First child", "model": "value4", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value1", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value2", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value3", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value4", "size": "320" }, { "dep": "Second Top", "name": "First Child", "model": "value1", "size": "320" }, { "dep": "Second Top", "name": "First Child", "model": "value2", "size": "320" }, { "dep": "Second Top", "name": "First Child", "model": "value3", "size": "320" }, { "dep": "Second Top", "name": "First Child", "model": "value4", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value1", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value2", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value3", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value4", "size": "320" }, { "dep": "Third Top", "name": "First Child", "model": "value2", "size": "320" }, { "dep": "Third Top", "name": "First Child", "model": "value3", "size": "320" }, { "dep": "Third Top", "name": "First Child", "model": "value4", "size": "320" }, { "dep": "Third Top", "name": "First Child", "model": "value5", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value1", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value2", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value3", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value4", "size": "320" } ] var newData = {"name":"root", "children":{}} data.forEach(function(d){ if(typeof newData.children[d.dep] !== 'undefined') { newData.children[d.dep].children.push(d) } else { newData.children[d.dep] = {"name": d.dep, "children": [{"name": d.name, "children": [{"name": d.model, "size": d.size}]}]} } }) newData.children = Object.keys(newData.children).map(function (key) { return newData.children[key]; }); // show what we've got d3.select('body').append('pre') .text(JSON.stringify(newData, null, ' '));
輸出當前代碼
{ "name": "root", "children": [ { "name": "First Top", "children": [ { "name": "First child", "children": [ { "name": "value1", "size": "320" } ] }, { "dep": "First Top", "name": "First child", "model": "value2", "size": "320" }, { "dep": "First Top", "name": "First child", "model": "value3", "size": "320" }, { "dep": "First Top", "name": "First child", "model": "value4", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value1", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value2", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value3", "size": "320" }, { "dep": "First Top", "name": "SECOND CHILD", "model": "value4", "size": "320" } ] }, { "name": "Second Top", "children": [ { "name": "First Child", "children": [ { "name": "value1", "size": "320" } ] }, { "dep": "Second Top", "name": "First Child", "model": "value2", "size": "320" }, { "dep": "Second Top", "name": "First Child", "model": "value3", "size": "320" }, { "dep": "Second Top", "name": "First Child", "model": "value4", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value1", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value2", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value3", "size": "320" }, { "dep": "Second Top", "name": "SECOND CHILD", "model": "value4", "size": "320" } ] }, { "name": "Third Top", "children": [ { "name": "First Child", "children": [ { "name": "value2", "size": "320" } ] }, { "dep": "Third Top", "name": "First Child", "model": "value3", "size": "320" }, { "dep": "Third Top", "name": "First Child", "model": "value4", "size": "320" }, { "dep": "Third Top", "name": "First Child", "model": "value5", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value1", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value2", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value3", "size": "320" }, { "dep": "Third Top", "name": "Second Child", "model": "value4", "size": "320" } ] } ] }
期望的輸出格式:
{ "name": "root", "children": [ { "name": "First Top", "children": [ { "name": "First child", "children": [ { "name": "value1", "size": "320" }, { "name": "value2", "size": "320" }, { "name": "value3", "size": "320" }, { "name": "value4", "size": "320" } ] }, { "name": "Second child", "children": [ { "name": "value1", "size": "320" }, { "name": "value2", "size": "320" }, { "name": "value3", "size": "320" }, { "name": "value4", "size": "320" } ] }, ] }, { "name": "Second Top", "children": [ { "name": "First child", "children": [ { "name": "value1", "size": "320" }, { "name": "value2", "size": "320" }, { "name": "value3", "size": "320" }, { "name": "value4", "size": "320" } ] }, { "name": "Second child", "children": [ { "name": "value1", "size": "320" }, { "name": "value2", "size": "320" }, { "name": "value3", "size": "320" }, { "name": "value4", "size": "320" } ] }, ] }, { "name": "Third Top", "children": [ { "name": "First child", "children": [ { "name": "value1", "size": "320" }, { "name": "value2", "size": "320" }, { "name": "value3", "size": "320" }, { "name": "value4", "size": "320" } ] }, { "name": "Second child", "children": [ { "name": "value1", "size": "320" }, { "name": "value2", "size": "320" }, { "name": "value3", "size": "320" }, { "name": "value4", "size": "320" } ] }, ] } ] }
我已經開了一個星期了,但我一個人無法理解。 有人請修改函數,以便在我更新時以分層格式獲取數據。
提前致謝!!
更新為使用遞歸方法
這應該適用於n
級而不僅僅是2級或3級。您只需指定哪些屬性定義哪些級別。
var data = [
{ "dep": "First Top", "name": "First child", "model": "value1", "size": "320" },
{ "dep": "First Top", "name": "First child", "model": "value2", "size": "320" },
{ "dep": "First Top", "name": "SECOND CHILD", "model": "value1", "size": "320" },
{ "dep": "Second Top", "name": "First Child", "model": "value1", "size": "320" }
];
var newData = { name :"root", children : [] },
levels = ["dep","name"];
// For each data row, loop through the expected levels traversing the output tree
data.forEach(function(d){
// Keep this as a reference to the current level
var depthCursor = newData.children;
// Go down one level at a time
levels.forEach(function( property, depth ){
// Look to see if a branch has already been created
var index;
depthCursor.forEach(function(child,i){
if ( d[property] == child.name ) index = i;
});
// Add a branch if it isn't there
if ( isNaN(index) ) {
depthCursor.push({ name : d[property], children : []});
index = depthCursor.length - 1;
}
// Now reference the new child array as we go deeper into the tree
depthCursor = depthCursor[index].children;
// This is a leaf, so add the last element to the specified branch
if ( depth === levels.length - 1 ) depthCursor.push({ name : d.model, size : d.size });
});
});
var data = [
{ "state": "UP", "district": "Agra", "block": "IradatNagar","school":"APS","name":"A" },
{ "state": "UP", "district": "Agra", "block": "IradatNagar","school":"IPS","name":"B" },
{ "state": "UP", "district": "Agra", "block": "IradatNagar","school":"APS","name":"C" },
{ "state": "MP", "district": "Bhopal", "block": "chota_Bhopal","school":"DPS","name":"D" },
{ "state": "UP", "district": "Mathura", "block": "Farah","school":"HPS","name":"E" },
{ "state": "UP", "district": "Kanpur", "block": "Mania","school":"BPs","name":"F" },
{ "state": "UP", "district": "Agra", "block": "Arjun Nagar","school":"GPS","name":"G" },
{ "state": "MP", "district": "Gwalior", "block": "Surya Nagar","school":"DPS","name":"H" }
];
var newData = { name :"State", children : [] },
levels = ["state","district","block","school"];
data.forEach(function(d){
var depthCursor = newData.children;
levels.forEach(function( property, depth )
{
var index;
depthCursor.forEach(function(child,i)
{
if ( d[property] == child.name )
index = i;
});
if ( isNaN(index) )
{
depthCursor.push({name : d[property], children : []});
index = depthCursor.length - 1;
}
depthCursor = depthCursor[index].children;
if ( depth === levels.length - 1 )
{
depthCursor.push({ name : d.name});
}
});
});
console.log(newData);
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