离子两个阵列 [英] Ionic two arrays

问题描述

有两个数组，即menuitems和posts。

There are two arrays, namely menuitems and posts.

我想通过以下方式过滤与menuitems具有相同ID的帖子：

I would like to filter posts that has the same ID with those in menuitems by doing something like:

this.menuitems = this.menuitems.filter((item) =>{ 
return item.eName.toLowerCase().indexOf(dishname.toLowerCase()) > -1 }) 
this.posts = this.posts.filter( function(e){ return e.restaurantID == this.menuitems; }); 

Json的帖子：

{
"restaurantID": "20180322",
"avgPrice": 99,
"avgRate": 50,
"cName": "tt",
"eName": "test",
"cAddress": "tt",
"eAddress": "test",
"logo": "111",
"cCuisine": "",
"eCuisine": "Cantonese",
"startsat": "2018-03-21 00:00:00"

}

json for menuitems：

Json for menuitems:

{
"menuID": "test02",
"RestaurantID": "20180322",
"catID": null,
"eDescription": null,
"cDescription": null,
"price": 99,
"setPrice": 8,
"orderCode": 9,
"eName": "test",
"cName": "tt",
"cCategory": null,
"eCategory": null

}

但它不起作用！提前致谢！

But it doesn't work! Thanks in advance!

推荐答案

也许是这样的：

let flatMenu = this.menuItems.map(function(obj) {return obj.RestaurantID; })

for(let i = 0; i<this.posts.length; i++) {   
let objectFound = flatMenu.indexOf(this.posts[i].restaurantID)
if (objectFound == -1) { this.posts[i] = null}
}

请记住，js区分大小写。

And remember, js is case sensitive.

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