javascript在对象数组中查找匹配值的索引

Question

I'm looking for the index of an item in an array of a list of objects by looking for a specific value inside of an object

currently, I'm doing this via

var x = [{ _id: '59974d9015a07e09b88e3b53', status: '1', id: '59974d2915a07e09b88e3b4b' }, { _id: '12345', status: '1', id: '54321' }]

var index = null;

for (var i=0; i<x.length; i++) {
    if ( x[i]._id == '59974d9015a07e09b88e3b53' ) {
        index = i;
        break;
    }
}

https://jsfiddle.net/yaocpsjd/

is there a more elegant solution via ES* where I wouldn't need to do a loop?

Answer 1

You can use findIndex() method that returns index of first element that satisfies condition otherwise it returns -1.

 var x = [{ _id: '59974d9015a07e09b88e3b53', status: '1', id: '59974d2915a07e09b88e3b4b' }, { _id: '12345', status: '1', id: '54321' }] var index = x.findIndex(e => e._id == '59974d9015a07e09b88e3b53') console.log(index)