Filter, Object, keys, Allow, Include, exclude function and undefined

filter-object-by-keys.js

// Google Search
// Tags
// Filter, Object, keys, Allow, Include

// list of allowed properties
let allowed = ['prop', 'account', 'eVar']
// kindly see reponse json above

function filterByAllowedKeys(allowed, data){
    let responseKeys = Object.keys(data)
    // check if function
    const isFunction = (name) => {
        return name && {}.toString.call(name) === '[object Function]';
    };
    // if key is part of keys pool
    const isKeyFrom = (allowed, curKey) => {
        let isValid = false
        for(var i=0; i< allowed.length; i++){
            let RE = new RegExp(allowed[i])
            isValid = RE.test(curKey) 
            if(isValid) return true
        }
        return isValid
    }
    let collection = 
    responseKeys.reduce( (list, key, idx) => {
        let temp = {};   
        /**
         * should part of allowed key
         * should not be a function
         * should not undefined
         *  */ 
        if( isKeyFrom(allowed, key) === true && 
            isFunction(data[key]) === false && 
            data[key] !== undefined ){
            temp = {...temp, [key]: data[key] }
        }
        return {...list, ...temp}
    }, {})
    return collection;
}
let result = filterByAllowedKeys(allowed, response)
console.log(result)