I have an array model, as below:
records:[{
"empid":1,
"fname": "X",
"lname": "Y"
},
{
"empid":2,
"fname": "A",
"lname": "Y"
},
{
"empid":3,
"fname": "B",
"lname": "Y"
},
{
"empid":4,
"fname": "C",
"lname": "Y"
},
{
"empid":5,
"fname": "C",
"lname": "Y"
}
]
Now I have an array of empid's [1,4,5]
.
So now, I need to filter the first array, which contains all the keys in my second.
Output:
records:[{
"empid":1,
"fname": "X",
"lname": "Y"
},
{
"empid":4,
"fname": "C",
"lname": "Y"
},
{
"empid":5,
"fname": "C",
"lname": "Y"
}
]
I can do this using a forEach
loop in angular
, but as I have more than 100 records in my model object, I need a way to handle this in a much cleaner way.
I'm thinking of creating a custom filter, but what is your take on it? (If yes, please provide sample code to achieve this).
You can do it with Array.prototype.filter()
,
var data = { records : [{ "empid": 1, "fname": "X", "lname": "Y" }, { "empid": 2, "fname": "A", "lname": "Y" }, { "empid": 3, "fname": "B", "lname": "Y" }, { "empid": 4, "fname": "C", "lname": "Y" }, { "empid": 5, "fname": "C", "lname": "Y" }] }
var empIds = [1,4,5]
var filteredArray = data.records.filter(function(itm){
return empIds.indexOf(itm.empid) > -1;
});
filteredArray = { records : filteredArray };
If the callBack
returns a true
value, then the itm
passed to that particular callBack
will be filtered out. You can read more about it here.