javascript - Test whether value exists within array of objects

Question

I have an array of objects and I would like to test it to determine whether a property with a certain value exists (at least one occurrence) and for it to return a boolean value to indicate the result. I'm using the Ramda library and have been experimenting with the has function to try and achieve this, however this only returns a boolean on whether the actual property exists and not it's respective value.

const data = [
    {
        id: 10004,
        name: 'Daniel',
        age: 43,
        sport: 'football'
    },
    {
        id: 10005,
        name: 'Tom',
        age: 23,
        sport: 'rugby'
    },
    {
        id: 10006,
        name: 'Lewis',
        age: 32,
        sport: 'football'
    },
];

Checking the array of objects for sport: 'rugby' should return true and sport: 'tennis' should return false.

Any help will be greatly appreciated, thanks.

Answer 1

如果您正在寻找 Ramda 解决方案，这会很好：

R.filter(R.propEq('sport', 'rugby'))(data)

R.has，正如您所指出的，仅检查对象是否具有命名属性。 R.propIs检查属性是否属于给定类型。 R.propEq测试属性是否存在并等于给定值，更通用R.propSatisfies的检查属性值是否匹配任意谓词。

Answer 2

你可以试试这个功能：

function myFind(data, key, value) {
    return data.some(function(obj){
        return key in obj && obj[key] == value;
    });
}

参考：Array.some()