requirebin sketch

index.js

var traverse = require('traverse');

function recurseKeySwap (obj, prevKey, newKey) {
  return traverse(obj).map(function (value) {
    // if key we want to swap
    if (this.key === prevKey) {
      // remove value at previous key
      this.remove();
      // set value at new key
      this.parent.node[newKey] = value;
    }
  });
}
var obj = { "@id": "asdf", "x": "y" };
console.log("swapped", recurseKeySwap(obj, "@id", "id"));
console.log("original", obj);

minified.js

require=function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({traverse:[function(require,module,exports){var traverse=module.exports=function(obj){return new Traverse(obj)};function Traverse(obj){this.value=obj}Traverse.prototype.get=function(ps){var node=this.value;for(var i=0;i<ps.length;i++){var key=ps[i];if(!node||!hasOwnProperty.call(node,key)){node=undefined;break}node=node[key]}return node};Traverse.prototype.has=function(ps){var node=this.value;for(var i=0;i<ps.length;i++){var key=ps[i];if(!node||!hasOwnProperty.call(node,key)){return false}node=node[key]}return true};Traverse.prototype.set=function(ps,value){var node=this.value;for(var i=0;i<ps.length-1;i++){var key=ps[i];if(!hasOwnProperty.call(node,key))node[key]={};node=node[key]}node[ps[i]]=value;return value};Traverse.prototype.map=function(cb){return walk(this.value,cb,true)};Traverse.prototype.forEach=function(cb){this.value=walk(this.value,cb,false);return this.value};Traverse.prototype.reduce=function(cb,init){var skip=arguments.length===1;var acc=skip?this.value:init;this.forEach(function(x){if(!this.isRoot||!skip){acc=cb.call(this,acc,x)}});return acc};Traverse.prototype.paths=function(){var acc=[];this.forEach(function(x){acc.push(this.path)});return acc};Traverse.prototype.nodes=function(){var acc=[];this.forEach(function(x){acc.push(this.node)});return acc};Traverse.prototype.clone=function(){var parents=[],nodes=[];return function clone(src){for(var i=0;i<parents.length;i++){if(parents[i]===src){return nodes[i]}}if(typeof src==="object"&&src!==null){var dst=copy(src);parents.push(src);nodes.push(dst);forEach(objectKeys(src),function(key){dst[key]=clone(src[key])});parents.pop();nodes.pop();return dst}else{return src}}(this.value)};function walk(root,cb,immutable){var path=[];var parents=[];var alive=true;return function walker(node_){var node=immutable?copy(node_):node_;var modifiers={};var keepGoing=true;var state={node:node,node_:node_,path:[].concat(path),parent:parents[parents.length-1],parents:parents,key:path.slice(-1)[0],isRoot:path.length===0,level:path.length,circular:null,update:function(x,stopHere){if(!state.isRoot){state.parent.node[state.key]=x}state.node=x;if(stopHere)keepGoing=false},"delete":function(stopHere){delete state.parent.node[state.key];if(stopHere)keepGoing=false},remove:function(stopHere){if(isArray(state.parent.node)){state.parent.node.splice(state.key,1)}else{delete state.parent.node[state.key]}if(stopHere)keepGoing=false},keys:null,before:function(f){modifiers.before=f},after:function(f){modifiers.after=f},pre:function(f){modifiers.pre=f},post:function(f){modifiers.post=f},stop:function(){alive=false},block:function(){keepGoing=false}};if(!alive)return state;function updateState(){if(typeof state.node==="object"&&state.node!==null){if(!state.keys||state.node_!==state.node){state.keys=objectKeys(state.node)}state.isLeaf=state.keys.length==0;for(var i=0;i<parents.length;i++){if(parents[i].node_===node_){state.circular=parents[i];break}}}else{state.isLeaf=true;state.keys=null}state.notLeaf=!state.isLeaf;state.notRoot=!state.isRoot}updateState();var ret=cb.call(state,state.node);if(ret!==undefined&&state.update)state.update(ret);if(modifiers.before)modifiers.before.call(state,state.node);if(!keepGoing)return state;if(typeof state.node=="object"&&state.node!==null&&!state.circular){parents.push(state);updateState();forEach(state.keys,function(key,i){path.push(key);if(modifiers.pre)modifiers.pre.call(state,state.node[key],key);var child=walker(state.node[key]);if(immutable&&hasOwnProperty.call(state.node,key)){state.node[key]=child.node}child.isLast=i==state.keys.length-1;child.isFirst=i==0;if(modifiers.post)modifiers.post.call(state,child);path.pop()});parents.pop()}if(modifiers.after)modifiers.after.call(state,state.node);return state}(root).node}function copy(src){if(typeof src==="object"&&src!==null){var dst;if(isArray(src)){dst=[]}else if(isDate(src)){dst=new Date(src.getTime?src.getTime():src)}else if(isRegExp(src)){dst=new RegExp(src)}else if(isError(src)){dst={message:src.message}}else if(isBoolean(src)){dst=new Boolean(src)}else if(isNumber(src)){dst=new Number(src)}else if(isString(src)){dst=new String(src)}else if(Object.create&&Object.getPrototypeOf){dst=Object.create(Object.getPrototypeOf(src))}else if(src.constructor===Object){dst={}}else{var proto=src.constructor&&src.constructor.prototype||src.__proto__||{};var T=function(){};T.prototype=proto;dst=new T}forEach(objectKeys(src),function(key){dst[key]=src[key]});return dst}else return src}var objectKeys=Object.keys||function keys(obj){var res=[];for(var key in obj)res.push(key);return res};function toS(obj){return Object.prototype.toString.call(obj)}function isDate(obj){return toS(obj)==="[object Date]"}function isRegExp(obj){return toS(obj)==="[object RegExp]"}function isError(obj){return toS(obj)==="[object Error]"}function isBoolean(obj){return toS(obj)==="[object Boolean]"}function isNumber(obj){return toS(obj)==="[object Number]"}function isString(obj){return toS(obj)==="[object String]"}var isArray=Array.isArray||function isArray(xs){return Object.prototype.toString.call(xs)==="[object Array]"};var forEach=function(xs,fn){if(xs.forEach)return xs.forEach(fn);else for(var i=0;i<xs.length;i++){fn(xs[i],i,xs)}};forEach(objectKeys(Traverse.prototype),function(key){traverse[key]=function(obj){var args=[].slice.call(arguments,1);var t=new Traverse(obj);return t[key].apply(t,args)}});var hasOwnProperty=Object.hasOwnProperty||function(obj,key){return key in obj}},{}]},{},[]);var traverse=require("traverse");function recurseKeySwap(obj,prevKey,newKey){return traverse(obj).map(function(value){if(this.key===prevKey){this.remove();this.parent.node[newKey]=value}})}var obj={"@id":"asdf",x:"y"};console.log("swapped",recurseKeySwap(obj,"@id","id"));console.log("original",obj);

package.json

{
  "name": "requirebin-sketch",
  "version": "1.0.0",
  "dependencies": {
    "traverse": "0.6.6"
  }
}

page-head.html

<style type='text/css'>html, body { margin: 0; padding: 0; border: 0; }
body, html { height: 100%; width: 100%; }</style>

requirebin.md

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