How to Filter an Array of Objects Based on Matching Properties with Another Array of Objects?

Filtering Array of Objects with Another Array of Objects

Consider the following arrays of objects:

myArray:

[
{
    userid: "100", 
    projectid: "10",
    rowid: "0"
},
{
    userid: "101", 
    projectid: "11",
    rowid: "1"},
{ 
    userid: "102", 
    projectid: "12",
    rowid: "2"}, 
{ 
    userid: "103", 
    projectid: "13",
    rowid: "3"
},
{ 
    userid: "101", 
    projectid: "10",
    rowid: "4"
}
...]

myFilter:

[
{
    userid: "101", 
    projectid: "11"
}, 
{
    userid: "102", 
    projectid: "12"
},
{
    userid: "103",
    projectid: "11"
}]

The goal is to filter myArray using myFilter such that only objects in myArray that have matching userid and projectid values with the objects in myFilter are included in the filtered array.

Solution:

We can employ the filter and some array methods to achieve this filtering:

<code class="javascript">const myArrayFiltered = myArray.filter((el) => {
  return myFilter.some((f) => {
    return f.userid === el.userid &amp;&amp; f.projectid === el.projectid;
  });
});</code>

Explanation:

• The filter method iterates over each element in myArray.
• For each element, the some method is used to check if there exists an element in myFilter where both the userid and projectid values match the current element.
• If such a match is found for any element in myFilter, the current element from myArray is included in the myArrayFiltered array.
• Otherwise, it is excluded.

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