Magic lambdas in JS

index.js

const DeepProxy = require("proxy-deep")

const _ = new DeepProxy({}, {
    _pushOp(op) {
    },

    get(target, path, receiver){
        return this.nest(function() {});
    },
    apply(target, thisArg, [obj]){    
        return this.path.reduce((currentObj, prop) => {
            if(!(currentObj && prop in currentObj)) {
                return null;
            }
            
            return currentObj[prop];
        }, obj);
    },
});

const objects = [
    {
        entity: {
            valid: true,
            meta: {
                name: "name",
                description: "description",
            },
        },
    },
    {
        entity: {
            valid: false,
            meta: {
                name: "my Name",
                description: "My description",
            },
        },
    },
];

objects
    .map(_.entity)
    .filter(_.valid)
    .map(_.meta.name)
    .forEach(x => console.log(x));