diff --git a/.eslintrc b/.eslintrc
index fa9296a..12affd2 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -18,7 +18,7 @@ rules:
   eqeqeq: 2
   use-isnan: 2
   no-eq-null: 2
-  brace-style: 2
+  // brace-style: 2
   spaced-line-comment: 2
   valid-jsdoc: 2
   space-infix-ops: 2
@@ -37,7 +37,9 @@ rules:
   camelcase: 2
   new-cap: 2
   consistent-this: [1, "_this"]
-  func-names: 2
+  //func-names: 2
   key-spacing: 2
   no-dupe-keys: 2
   strict: 2
+  no-process-exit: 0
+  no-underscore-dangle: 0
diff --git a/Makefile b/Makefile
index d8817f3..f4539e9 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ NPM = npm
 PEGJS = node_modules/.bin/pegjs
 BROWSERIFY = node_modules/.bin/browserify
 UGLIFY = node_modules/.bin/uglifyjs
-LINTER = node_modules/.bin/jshint
+LINTER = node_modules/.bin/eslint
 MOCHA = node_modules/.bin/mocha
 
 all: build browser
@@ -30,7 +30,7 @@ bench: benchmark/benchmark.js
 	$(NODE) $<
 
 lint:
-	$(LINTER) index.js bin/cli.js test/index.js test/cli.js
+	$(LINTER) index.js bin/cli.js
 
 test: test/*
 	$(MOCHA)
diff --git a/bin/cli.js b/bin/cli.js
index d2e6f5b..13114e9 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -25,8 +25,8 @@ program
   .option('    --hex', 'Output in hex encoding')
   .option('    --base64', 'Output in base64 encoding');
 
-function Runtime(program) {
-  this.program = program;
+function Runtime(cli) {
+  this.program = cli;
   this.availablePlugins = {
     yaml: 'js-yaml',
     msgpack: 'msgpack',
@@ -42,15 +42,15 @@ Runtime.prototype.error = function(str) {
 };
 
 Runtime.prototype.loadPlugins = function() {
-  var rt = this;
+  var _this = this;
   var plugins = {};
   var config = this.availablePlugins;
   Object.keys(config).forEach(function(k) {
-    if(rt.program[k]) {
+    if(_this.program[k]) {
       try { plugins[k] = require(config[k]); }
       catch (e) {
-        rt.error('Cannot load package: '+config[k]+' ('+k+' mode)\n'+
-              'Installation instruction: npm install -g '+config[k]);
+        _this.error('Cannot load package: ' + config[k] + ' (' + k + ' mode)\n' +
+              'Installation instruction: npm install -g ' + config[k]);
       }
     }
   });
@@ -67,7 +67,7 @@ Runtime.prototype.loadRc = function() {
     if(fs.existsSync(fn)) {
       return require(fn);
     }
-    return this.error('rc file not exists: '+this.program.usonrc);
+    return this.error('rc file not exists: ' + this.program.usonrc);
   }
   fn = path.resolve(home, RCFILE);
   if(fs.existsSync(fn)) {
@@ -91,18 +91,18 @@ Runtime.prototype.parse = function(input) {
   if(this.program.form) {
     return this.plugins.form.stringify(output);
   }
-  return JSON.stringify(output, null, space)+'\n';
+  return JSON.stringify(output, null, space) + '\n';
 };
 
 
 Runtime.prototype.listenStdin = function() {
-  var rt = this;
-  process.stdin.on('data', function (buf) {
+  var _this = this;
+  process.stdin.on('data', function(buf) {
     var str = buf.toString().trim();
     if(!str) { return; }
-    rt.process(str);
+    _this.process(str);
   });
-  process.stdin.on('end', function () {
+  process.stdin.on('end', function() {
     process.exit();
   });
 };
@@ -110,16 +110,16 @@ Runtime.prototype.listenStdin = function() {
 Runtime.prototype.writeData = function(data) {
   if(this.program.output) {
     if(fs.existsSync(this.program.output)) {
-      return this.error('File exists: '+this.program.output+', exiting ..');
+      return this.error('File exists: ' + this.program.output + ', exiting ..');
     }
     fs.writeFileSync(this.program.output, data);
-    console.log('File saved: '+this.program.output);
-    return;
+    console.log('File saved: ' + this.program.output);
+    return true;
   }
   if(this.program.hex) {
-    data = new Buffer(data).toString('hex')+'\n';
+    data = new Buffer(data).toString('hex') + '\n';
   } else if(this.program.base64) {
-    data = new Buffer(data).toString('base64')+'\n';
+    data = new Buffer(data).toString('base64') + '\n';
   }
   process.stdout.write(data);
 };
@@ -128,15 +128,15 @@ Runtime.prototype.process = function(data) {
   this.writeData(this.parse(data));
 };
 
-(function runProgram(program) {
-
-  var runtime = new Runtime(program);
+(function runProgram(cli) {
+  var runtime = new Runtime(cli);
+  var data;
 
   if(program.input) {
     if(!fs.existsSync(program.input)) {
       runtime.error('File not exists: ' + program.input);
     }
-    var data = fs.readFileSync(program.input).toString();
+    data = fs.readFileSync(program.input).toString();
     runtime.process(data);
   }
 
diff --git a/dist/uson.min.js b/dist/uson.min.js
index 9973456..be293a7 100644
--- a/dist/uson.min.js
+++ b/dist/uson.min.js
@@ -1 +1 @@
-(function(e){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=e()}else if(typeof define==="function"&&define.amd){define([],e)}else{var t;if(typeof window!=="undefined"){t=window}else if(typeof global!=="undefined"){t=global}else if(typeof self!=="undefined"){t=self}else{t=this}t.USON=e()}})(function(){var e,t,r;return function i(e,t,r){function n(u,l){if(!t[u]){if(!e[u]){var s=typeof require=="function"&&require;if(!l&&s)return s(u,!0);if(f)return f(u,!0);var o=new Error("Cannot find module '"+u+"'");throw o.code="MODULE_NOT_FOUND",o}var a=t[u]={exports:{}};e[u][0].call(a.exports,function(t){var r=e[u][1][t];return n(r?r:t)},a,a.exports,i,e,t,r)}return t[u].exports}var f=typeof require=="function"&&require;for(var u=0;u<r.length;u++)n(r[u]);return n}({1:[function(e,t,r){t.exports=function(){function e(e,t){function r(){this.constructor=e}r.prototype=t.prototype;e.prototype=new r}function 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t}function Wt(){var t;if(e.charCodeAt(We)===92){t=pe;We++}else{t=i;if(it===0){pt(he)}}return t}function Xt(){var t;if(Ue.test(e.charAt(We))){t=e.charAt(We);We++}else{t=i;if(it===0){pt(De)}}return t}function Yt(){var t;if($e.test(e.charAt(We))){t=e.charAt(We);We++}else{t=i;if(it===0){pt(Ie)}}return t}function er(){var t;if(Je.test(e.charAt(We))){t=e.charAt(We);We++}else{t=i;if(it===0){pt(Te)}}return t}function tr(){var e,t;e=We;t=Zt();if(t!==i){Xe=e;t=ke(t)}e=t;return e}function rr(){var t,r,n,f;t=We;r=[];if(Be.test(e.charAt(We))){n=e.charAt(We);We++}else{n=i;if(it===0){pt(Le)}}if(n!==i){while(n!==i){r.push(n);if(Be.test(e.charAt(We))){n=e.charAt(We);We++}else{n=i;if(it===0){pt(Le)}}}}else{r=u}if(r!==i){n=mt();if(n!==i){f=dt();if(f!==i){Xe=t;r=Me(r,f);t=r}else{We=t;t=u}}else{We=t;t=u}}else{We=t;t=u}return t}function ir(){var t,r,n,f;t=We;r=bt();if(r!==i){n=[];if(Ge.test(e.charAt(We))){f=e.charAt(We);We++}else{f=i;if(it===0){pt(He)}}while(f!==i){n.push(f);if(Ge.test(e.charAt(We))){f=e.charAt(We);We++}else{f=i;if(it===0){pt(He)}}}if(n!==i){r=[r,n];t=r}else{We=t;t=u}}else{We=t;t=u}return t}function nr(){var t;if(Ke.test(e.charAt(We))){t=e.charAt(We);We++}else{t=i;if(it===0){pt(Pe)}}return t}function fr(){var t;if(Qe.test(e.charAt(We))){t=e.charAt(We);We++}else{t=i;if(it===0){pt(Ve)}}return t}nt=f();if(nt!==i&&We===e.length){return nt}else{if(nt!==i&&We<e.length){pt({type:"end",description:"end of input"})}throw ht(null,rt,tt)}}return{SyntaxError:t,parse:r}}()},{}],2:[function(e,t,r){"use strict";var i=e("./dist/parser");var n=e("object-assign");var f=Object.prototype.toString;var u;var l={obj:function(e){return JSON.parse("{"+e+"}")},arr:function(e){return JSON.parse("["+e+"]")},str:function(e){return e.toString()},"int":function(e){return parseInt(e)},"float":function(e){return parseFloat(e)},"null":function(){return null},date:function(e){return new Date(e)},bool:function(e){return e==="true"?true:false}};function s(e){e=e||{};this.mode=e.mode||false}s.prototype.process=function(e){switch(this.mode){case"object":return this.toObject(e);case"json":return e[0];default:return e}};s.prototype.toObject=function(e){var t=0;var r={};e.forEach(function(e){var i=f.call(e);if(i==="[object Array]"){r[t]=e;t=t+1}else if(i==="[object Object]"){r=n(r,e)}else{r[t]=e;t=t+1}});return r};u={parse:function(e,t,r){var u;var o;if(f.call(e)==="[object Object]"&&e.toString){e=e.toString()}r=n(l,r||{});u=i.parse(e,{type:r});o=new s({mode:t||false});return o.process(u)},stringify:function(){return null},parser:i};t.exports=u},{"./dist/parser":1,"object-assign":3}],3:[function(e,t,r){"use strict";function i(e){if(e==null){throw new TypeError("Object.assign cannot be called with null or undefined")}return Object(e)}t.exports=Object.assign||function(e,t){var r;var n;var f=i(e);for(var u=1;u<arguments.length;u++){r=arguments[u];n=Object.keys(Object(r));for(var l=0;l<n.length;l++){f[n[l]]=r[n[l]]}}return f}},{}]},{},[2])(2)});
\ No newline at end of file
diff --git a/dist/uson.pack.js b/dist/uson.pack.js
index 6212486..1e9ead3 100644
--- a/dist/uson.pack.js
+++ b/dist/uson.pack.js
@@ -1802,11 +1802,12 @@ module.exports = (function() {
 var parser = require('./dist/parser');
 var assign = require('object-assign');
 var toString = Object.prototype.toString;
+var uson;
 
 var usonTypes = {
   // collection
-  'obj': function(val) { return JSON.parse('{'+val+'}'); },
-  'arr': function(val) { return JSON.parse('['+val+']'); },
+  'obj': function(val) { return JSON.parse('{' + val + '}'); },
+  'arr': function(val) { return JSON.parse('[' + val + ']'); },
 
   // scalars
   'str': function(val) { return val.toString(); },
@@ -1814,7 +1815,7 @@ var usonTypes = {
   'float': function(val) { return parseFloat(val); },
   'null': function() { return null; },
   'date': function(val) { return new Date(val); },
-  'bool': function(val) { return val === 'true' ? true : false; },
+  'bool': function(val) { return val === 'true' ? true : false; }
 };
 
 function Interpreter(options) {
@@ -1846,14 +1847,17 @@ Interpreter.prototype.toObject = function(values) {
       obj = assign(obj, item);
     } else {
       obj[arrcount] = item;
-      arrcount = arrcount+1;
+      arrcount = arrcount + 1;
     }
   });
   return obj;
 };
 
-var uson = {
+uson = {
   parse: function(str, mode, types) {
+    var arr;
+    var interpreter;
+
     // convert to string
     if(toString.call(str) === '[object Object]' && str.toString) {
       str = str.toString();
@@ -1861,9 +1865,9 @@ var uson = {
     // assign types
     types = assign(usonTypes, types || {});
     // parse
-    var arr = parser.parse(str, { type: types });
+    arr = parser.parse(str, { type: types });
     // create interpreter
-    var interpreter = new Interpreter({ mode: mode || false });
+    interpreter = new Interpreter({ mode: mode || false });
     // process
     return interpreter.process(arr);
   },
diff --git a/index.js b/index.js
index 8b87716..69e9622 100644
--- a/index.js
+++ b/index.js
@@ -3,11 +3,12 @@
 var parser = require('./dist/parser');
 var assign = require('object-assign');
 var toString = Object.prototype.toString;
+var uson;
 
 var usonTypes = {
   // collection
-  'obj': function(val) { return JSON.parse('{'+val+'}'); },
-  'arr': function(val) { return JSON.parse('['+val+']'); },
+  'obj': function(val) { return JSON.parse('{' + val + '}'); },
+  'arr': function(val) { return JSON.parse('[' + val + ']'); },
 
   // scalars
   'str': function(val) { return val.toString(); },
@@ -15,7 +16,7 @@ var usonTypes = {
   'float': function(val) { return parseFloat(val); },
   'null': function() { return null; },
   'date': function(val) { return new Date(val); },
-  'bool': function(val) { return val === 'true' ? true : false; },
+  'bool': function(val) { return val === 'true' ? true : false; }
 };
 
 function Interpreter(options) {
@@ -47,14 +48,17 @@ Interpreter.prototype.toObject = function(values) {
       obj = assign(obj, item);
     } else {
       obj[arrcount] = item;
-      arrcount = arrcount+1;
+      arrcount = arrcount + 1;
     }
   });
   return obj;
 };
 
-var uson = {
+uson = {
   parse: function(str, mode, types) {
+    var arr;
+    var interpreter;
+
     // convert to string
     if(toString.call(str) === '[object Object]' && str.toString) {
       str = str.toString();
@@ -62,9 +66,9 @@ var uson = {
     // assign types
     types = assign(usonTypes, types || {});
     // parse
-    var arr = parser.parse(str, { type: types });
+    arr = parser.parse(str, { type: types });
     // create interpreter
-    var interpreter = new Interpreter({ mode: mode || false });
+    interpreter = new Interpreter({ mode: mode || false });
     // process
     return interpreter.process(arr);
   },