immutable-obj

Regarding Issues

tool to access an obj and return a new one which share the common part

Installation

Use npm.

npm install --save-dev immutable-obj

API

var update = require('immutable-obj');
/*
obj // {}
path //array which define a scope for the changing part,the rest will be shared
value //if path exist alter the path value  else create the path then define the value
*/
var newObj = update(obj,path,value);
 
update.isEqual(obj,newObj);//check if value is equal,meant for react rerender check

usage

 
var a = {
    province: {
        address: {
            zone: 'A',
            info : {
                lastName : 'ze'
            }
        }
    },
    c: {
        x: [1,2,3],
        y: [1,{name'liu'},3,4]
    }
};
 
var b = update(a, ['province','address','zone'], 'B');
 
console.log('a',a,'\n' ,'b',b,'\n', b.province.address.info === a.province.address.info);
 
var c = update(a, 'province.address.zone', 'C');
 
console.log('a',a,'\n' ,'c',c,'\n');
 
var d = update(a, ['c','y',1], {name:'liu'});
 
console.log(a,d,a==d,isEqual(a,d));//false  true