比较 object 的两个数组以返回未找到的值

Question

I have two array of objects and I want to compare them and return values not found in the other

     arr1 = [{ text: "Company", value: 1},{ text: "Project", value: 3},{ 
         text: "Housing" value: 4}]
     arr2 = [{ newCol: "SumAmount", existCol: "Amount"}, { newCol: 
        "SumProj", existCol: "Proj"}]

I am comparing newCol values in arr2 against text in arr1, so since SumAmount and SumProj are not in the text values of arr1 I should get SumAmount and SumProj

Answer 1

Use filter and some

 arr1 = [{ text: "Company", value: 1},{ text: "Project", value: 3},{ text: "Housing",value: 4}] arr2 = [{ newCol: "SumAmount", existCol: "Amount"}, { newCol: "SumProj", existCol: "Proj"}] var res=arr2.filter(o=>.arr1.some(y=>y.text==o.newCol)) console.log(res)