Looking to filter one array with another, where values in the first array should match 'id' in the second array for filtering.
The arrays in question are:
const array1 = [a, b, c, d]
The array to be filtered based on matching 'id' values from array1 is:
const array2 = [
{
id: b
title: title1
},
{
id: d
title: title2
},
{
id: f
title: title3
}
]
A simple method is to utilize a pair of nested for-loops, although it may not be the most efficient option.
res = [];
for (var i = 0;i<array1.length;i++) {
for (var j = 0;j<array2.length;j++) {
if (array1[i] == array2[j].id) {
res.push(array2[j]);
break;
}
}
}
To filter an array based on another array, you can utilize Array.prototype.filter() along with Array.prototype.indexOf():
const primaryArray = ['a', 'b', 'c', 'd'];
const secondaryArray = [{
id: 'b',
title: 'title1'
}, {
id: 'd',
title: 'title2'
}, {
id: 'f',
title: 'title3'
}];
const filteredResult = secondaryArray.filter(function(item){
return primaryArray.indexOf(item.id) !== -1;
});
Make sure to add this missing '' when using the filter and includes methods with Arrays.
const array1 = ['a', 'b', 'c', 'd'];
const array2 = [
{
id: 'b',
title: 'title1'
},
{
id: 'd',
title: 'title2'
},
{
id: 'f',
title: 'title3'
}
]
const result = array2.filter(({id}) => array1.includes(id));
console.log(result);
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