比较两个对象数组 [英] compare two arrays of objects
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问题描述
我有两个这样的数组.第一个数组为customFields
,长度为2
i have two arrays like this. first array is customFields
and length is 2
var customFields = [
{
"$$hashKey":"object:259",
"fields":[
],
"id":0.84177744416334,
"inputType":"number",
"labelShown":"item",
"type":"textBox",
"value":"222222"
},
{
"$$hashKey":"object:260",
"fields":[
"as",
"dd",
"asd"
],
"id":0.51091342118417,
"inputType":"",
"labelShown":"labels",
"type":"selectBox",
"value":"dd"
}
]
第二个是field
,长度是3
var field = [
{
"fields":[
],
"id":0.84177744416334,
"inputType":"number",
"labelShown":"item",
"type":"textBox"
},
{
"fields":[
"as",
"dd",
"asd"
],
"id":0.51091342118417,
"inputType":"",
"labelShown":"labels",
"type":"selectBox"
},
{
"fields":[
],
"id":0.32625015743856,
"inputType":"text",
"labelShown":"sample",
"type":"textBox"
}
]
两个数组都是动态的,我需要通过id
字段比较这些数组,并将缺少的对象从field
数组添加到customFields
数组.我如何做到这一点,而没有2 for循环互相循环.什么是最有效的方法.谢谢!!!!
both arrays are dynamic and i need to compare these arrays by id
fields and add missing objects to customFields
array from field
array. how can i do this without 2 for loops looping inside one another. what is the most efficient way. thank you !!!!
推荐答案
您可以使用reduce()
和find()
获得所需的结果.
You can use reduce()
and find()
to get desired result.
var customFields = [{"$$hashKey":"object:259","fields":[],"id":0.84177744416334,"inputType":"number","labelShown":"item","type":"textBox","value":"222222"},{"$$hashKey":"object:260","fields":["as","dd","asd"],"id":0.51091342118417,"inputType":"","labelShown":"labels","type":"selectBox","value":"dd"}];
var field = [{"fields":[],"id":0.84177744416334,"inputType":"number","labelShown":"item","type":"textBox"},{"fields":["as","dd","asd"],"id":0.51091342118417,"inputType":"","labelShown":"labels","type":"selectBox"},{"fields":[],"id":0.32625015743856,"inputType":"text","labelShown":"sample","type":"textBox"}]
var result = field.reduce(function(r, e) {
var f = customFields.find(el => e.id == el.id)
r.push(f ? f : e)
return r;
}, [])
console.log(result)
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