diff --git a/.travis.yml b/.travis.yml
index 02d7b7c53..ad70bb394 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -51,9 +51,11 @@ script:
   - "[ $SAUCE_LABS == true ]  || [ $ISTANBUL == true ] || cd ./test"
   - "[ $SAUCE_LABS == true ]  || [ $ISTANBUL == true ] || $BIN $OPTION ./test.js ../lodash.js"
   - "[ $SAUCE_LABS == true ]  || [ $ISTANBUL == true ] || [ $TRAVIS_SECURE_ENV_VARS == false ] || $BIN $OPTION ./test.js ../lodash.min.js"
-  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"lodash tests\" runner=\"test/index.html?build=../lodash.js&noglobals=true\" tags=\"development\""
-  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"lodash tests\" runner=\"test/index.html?build=../lodash.min.js&noglobals=true\" tags=\"production\""
-  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"backbone tests\"   runner=\"test/backbone.html?build=../lodash.js\" tags=\"development,backbone\""
-  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"backbone tests\"   runner=\"test/backbone.html?build=../lodash.min.js\" tags=\"production,backbone\""
-  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"underscore tests\" runner=\"test/underscore.html?build=../lodash.js\" tags=\"development,underscore\""
-  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"underscore tests\" runner=\"test/underscore.html?build=../lodash.min.js\" tags=\"production,underscore\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"lodash tests\"     runner=\"test/index.html?build=../lodash.js&noglobals=true\"     tags=\"development\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"lodash tests\"     runner=\"test/index.html?build=../lodash.min.js&noglobals=true\" tags=\"production\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"underscore tests\" runner=\"test/underscore.html?build=../lodash.js\"               tags=\"development,underscore\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"underscore tests\" runner=\"test/underscore.html?build=../lodash.min.js\"           tags=\"production,underscore\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"backbone tests\"   runner=\"test/backbone.html?build=../lodash.js\"                 tags=\"development,backbone\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"backbone tests\"   runner=\"test/backbone.html?build=../lodash.min.js\"             tags=\"production,backbone\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"backbone tests\"   runner=\"test/backbone.html?build=../dist/lodash.core.js\"       tags=\"development,backbone\""
+  - "[ $SAUCE_LABS == false ] || $BIN ./test/saucelabs.js name=\"backbone tests\"   runner=\"test/backbone.html?build=../dist/lodash.core.min.js\"   tags=\"production,backbone\""
diff --git a/dist/lodash.core.js b/dist/lodash.core.js
index de651bcbc..de170519a 100644
--- a/dist/lodash.core.js
+++ b/dist/lodash.core.js
@@ -477,9 +477,9 @@
    * `replace` and `split`
    *
    * The wrapper methods that support shortcut fusion are:
-   * `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`, `findLast`,
-   * `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`, `tail`,
-   * `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+   * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+   * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+   * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
    *
    * The chainable wrapper methods are:
    * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`,
@@ -830,9 +830,10 @@
     // Assume cyclic values are equal.
     // For more information on detecting circular references see https://es5.github.io/#JO.
     stack || (stack = []);
-    var stacked = result(find(stack, function(entry) {
+    var stacked = find(stack, function(entry) {
       return entry[0] === object;
-    }), 1);
+    });
+    stacked = stacked && stacked[1];
     if (stacked) {
       return stacked == other;
     }
@@ -954,7 +955,7 @@
    */
   function basePick(object, props) {
     object = Object(object);
-    return baseReduce(props, function(result, key) {
+    return reduce(props, function(result, key) {
       if (key in object) {
         result[key] = object[key];
       }
@@ -1046,7 +1047,7 @@
    */
   function baseWrapperValue(value, actions) {
     var result = value;
-    return baseReduce(actions, function(result, action) {
+    return reduce(actions, function(result, action) {
       return action.func.apply(action.thisArg, arrayPush([result], action.args));
     }, result);
   }
@@ -1218,6 +1219,7 @@
       var arrValue = array[index],
           othValue = other[index];
 
+      var result;
       if (result !== undefined) {
         if (result) {
           continue;
@@ -1316,6 +1318,7 @@
       var objValue = object[key],
           othValue = other[key];
 
+      var result;
       // Recursively compare objects (susceptible to call stack limits).
       if (!(result === undefined
             ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
@@ -1353,20 +1356,18 @@
   var getLength = baseProperty('length');
 
   /**
-   * Initializes an array of property names based on `object`. If `object` is
-   * an array, `arguments` object, or `string` its index keys are returned,
-   * otherwise an empty array is returned.
+   * Creates an array of index keys for `object` values of arrays,
+   * `arguments` objects, and strings, otherwise `null` is returned.
    *
    * @private
    * @param {Object} object The object to query.
-   * @returns {Array} Returns the initialized array of property names.
+   * @returns {Array|null} Returns index keys, else `null`.
    */
-  function initKeys(object) {
-    var length = object ? object.length : 0;
-    length = (length && isLength(length) &&
-      (isArray(object) || isString(object) || isArguments(object)) && length) || 0;
-
-    return baseTimes(length, String);
+  function indexKeys(object) {
+    var length = object ? object.length : undefined;
+    return (isLength(length) && (isArray(object) || isString(object) || isArguments(object)))
+      ? baseTimes(length, String)
+      : null;
   }
 
   /**
@@ -3271,13 +3272,14 @@
     if (!(isProto || isArrayLike(object))) {
       return baseKeys(object);
     }
-    var result = initKeys(object),
-        length = result.length,
-        skipIndexes = !!length;
+    var indexes = indexKeys(object),
+        skipIndexes = !!indexes,
+        result = indexes || [],
+        length = result.length;
 
     for (var key in object) {
       if (hasOwnProperty.call(object, key) &&
-          !(skipIndexes && isIndex(key, length)) &&
+          !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
           !(isProto && key == 'constructor')) {
         result.push(key);
       }
@@ -3312,13 +3314,14 @@
         isProto = isPrototype(object),
         props = baseKeysIn(object),
         propsLength = props.length,
-        result = initKeys(object),
-        length = result.length,
-        skipIndexes = !!length;
+        indexes = indexKeys(object),
+        skipIndexes = !!indexes,
+        result = indexes || [],
+        length = result.length;
 
     while (++index < propsLength) {
       var key = props[index];
-      if (!(skipIndexes && isIndex(key, length)) &&
+      if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
           !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
         result.push(key);
       }
@@ -3793,10 +3796,10 @@
   lodash.VERSION = VERSION;
 
   // Add `Array` and `String` methods to `lodash.prototype`.
-  baseEach(['join', 'pop', 'push', 'replace', 'reverse', 'shift', 'sort', 'splice', 'split', 'unshift'], function(methodName) {
+  baseEach(['pop', 'join', 'reverse', 'push', 'replace', 'shift', 'sort', 'splice', 'split', 'unshift'], function(methodName) {
     var func = (/^(?:replace|split)$/.test(methodName) ? stringProto : arrayProto)[methodName],
         chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
-        retUnwrapped = /^(?:join|pop|replace|shift)$/.test(methodName);
+        retUnwrapped = /^(?:pop|join|replace|shift)$/.test(methodName);
 
     lodash.prototype[methodName] = function() {
       var args = arguments;
diff --git a/dist/lodash.core.min.js b/dist/lodash.core.min.js
index 6429fb3e3..1942f21f0 100644
--- a/dist/lodash.core.min.js
+++ b/dist/lodash.core.min.js
@@ -4,27 +4,27 @@
  * Build: `lodash core -o dist/lodash.core.js exports="amd,global"`
  */
 ;(function(){function n(n,t){for(var r=-1,e=t.length,u=n.length;++r<e;)n[u+r]=t[r];return n}function t(n,t,r){for(var e=-1,u=n.length;++e<u;){var o=n[e],i=t(o);if(null!=i&&(c===cn?i===i:r(i,c)))var c=i,f=o}return f}function r(n,t,r){var e;return r(n,function(n,r,u){return t(n,r,u)?(e=n,false):void 0}),e}function e(n,t,r,e,u){return u(n,function(n,u,o){r=e?(e=false,n):t(r,n,u,o)}),r}function u(n,t){return O(t,function(t){return n[t]})}function o(n){return n&&n.Object===Object?n:null}function i(n,t,r,e){r||(r={});
-for(var u=-1,o=t.length;++u<o;){var i=t[u],c=e?e(r[i],n[i],i,r,n):n[i],f=r[i];(c===c?c===f:f!==f)&&(c!==cn||i in r)||(r[i]=c)}return r}function c(n){return pn[n]}function f(n){var t=false;if(null!=n&&typeof n.toString!="function")try{t=!!(n+"")}catch(r){}return t}function a(n,t){return n=typeof n=="number"||ln.test(n)?+n:-1,n>-1&&0==n%1&&(null==t?9007199254740991:t)>n}function l(n){if(W(n)&&!Mn(n)){if(n instanceof p)return n;if(dn.call(n,"__wrapped__")){var t=new p(n.__wrapped__,n.__chain__);return t.__actions__=Rn(n.__actions__),
-t}}return new p(n)}function p(n,t){this.__wrapped__=n,this.__actions__=[],this.__chain__=!!t}function s(n,t,r){return n===cn||n===jn[r]?t:n}function h(n,t,r){if(typeof n!="function")throw new TypeError("Expected a function");return setTimeout(function(){n.apply(cn,r)},t)}function v(n,t){var r=true;return Bn(n,function(n,e,u){return r=!!t(n,e,u)}),r}function y(n,t){var r=[];return Bn(n,function(n,e,u){t(n,e,u)&&r.push(n)}),r}function _(t,r,e,u){u||(u=[]);for(var o=-1,i=t.length;++o<i;){var c=t[o];W(c)&&H(c)&&(e||Mn(c)||V(c))?r?_(c,r,e,u):n(u,c):e||(u[u.length]=c);
-}return u}function g(n,t){return n&&Dn(n,t,nn)}function b(n,t){return y(t,function(t){return K(n[t])})}function j(n,t,r,e,u){return n===t?true:null==n||null==t||!Q(n)&&!W(t)?n!==n&&t!==t:m(n,t,j,r,e,u)}function m(n,t,r,e,u,o){var i=Mn(n),c=Mn(t),a="[object Array]",l="[object Array]";i||(a=On.call(n),"[object Arguments]"==a&&(a="[object Object]")),c||(l=On.call(t),"[object Arguments]"==l&&(l="[object Object]"));var p="[object Object]"==a&&!f(n),c="[object Object]"==l&&!f(t);if((l=a==l)&&!i&&!p)return R(n,t,a);
-if(!(2&u)&&(a=p&&dn.call(n,"__wrapped__"),c=c&&dn.call(t,"__wrapped__"),a||c))return r(a?n.value():n,c?t.value():t,e,u,o);if(!l)return false;if(o||(o=[]),s=s(C(o,function(t){return t[0]===n}),1))return s==t;o.push([n,t]);var s=(i?D:I)(n,t,r,e,u,o);return o.pop(),s}function d(n){var t=typeof n;return"function"==t?n:null==n?un:("object"==t?E:A)(n)}function w(n){n=null==n?n:Object(n);var t,r=[];for(t in n)r.push(t);return r}function O(n,t){var r=-1,e=H(n)?Array(n.length):[];return Bn(n,function(n,u,o){e[++r]=t(n,u,o);
-}),e}function E(n){var t=nn(n),r=t.length;return function(e){if(null==e)return!r;for(e=Object(e);r--;){var u=t[r];if(!(u in e&&j(n[u],e[u],cn,true)))return false}return true}}function x(n,t){return n=Object(n),e(t,function(t,r){return r in n&&(t[r]=n[r]),t},{})}function A(n){return function(t){return null==t?cn:t[n]}}function N(n,t,r){var e=-1,u=n.length;for(t=null==t?0:Pn(t),0>t&&(t=-t>u?0:u+t),r=r===cn||r>u?u:Pn(r),0>r&&(r+=u),u=t>r?0:r-t>>>0,t>>>=0,r=Array(u);++e<u;)r[e]=n[e+t];return r}function S(n,t){
-var r;return Bn(n,function(n,e,u){return r=t(n,e,u),!r}),!!r}function T(t,r){return e(r,function(t,r){return r.func.apply(r.thisArg,n([t],r.args))},t)}function k(n){return P(function(t,r){var e=-1,u=null==t?0:r.length,o=u>1?r[u-1]:cn,o=typeof o=="function"?(u--,o):cn;for(t=Object(t);++e<u;){var i=r[e];i&&n(t,i,o)}return t})}function F(n){return function(){var t=arguments,r=Fn(n.prototype),t=n.apply(r,t);return Q(t)?t:r}}function B(n,t,r){function e(){for(var o=-1,i=arguments.length,c=-1,f=r.length,a=Array(f+i),l=this&&this!==gn&&this instanceof e?u:n;++c<f;)a[c]=r[c];
-for(;i--;)a[c++]=arguments[++o];return l.apply(t,a)}if(typeof n!="function")throw new TypeError("Expected a function");var u=F(n);return e}function D(n,t,r,e,u,o){var i=-1,c=1&u,f=n.length,a=t.length;if(f!=a&&!(2&u&&a>f))return false;for(;++i<f;){var l=n[i],a=t[i];if(rn!==cn){if(rn)continue;return false}if(c){if(!S(t,function(n){return l===n||r(l,n,e,u,o)}))return false}else if(l!==a&&!r(l,a,e,u,o))return false}return true}function R(n,t,r){switch(r){case"[object Boolean]":case"[object Date]":return+n==+t;case"[object Error]":
-return n.name==t.name&&n.message==t.message;case"[object Number]":return n!=+n?t!=+t:n==+t;case"[object RegExp]":case"[object String]":return n==t+""}return false}function I(n,t,r,e,u,o){var i=2&u,c=1&u,f=nn(n),a=f.length,l=nn(t);if(a!=l.length&&!i)return false;for(var p=a;p--;){var s=f[p];if(!(i?s in t:dn.call(t,s))||!c&&s!=l[p])return false}for(;++p<a;){if(s=f[p],c=n[s],l=t[s],rn===cn?c!==l&&!r(c,l,e,u,o):!rn)return false;i||(i="constructor"==s)}return i||(r=n.constructor,e=t.constructor,!(r!=e&&"constructor"in n&&"constructor"in t)||typeof r=="function"&&r instanceof r&&typeof e=="function"&&e instanceof e)?true:false;
-}function $(n){var t=n?n.length:0;n=t=t&&L(t)&&(Mn(n)||Y(n)||V(n))&&t||0;for(var t=String,r=-1,e=Array(n);++r<n;)e[r]=t(r);return e}function q(n){var t=n&&n.constructor;return n===(typeof t=="function"&&t.prototype||jn)}function z(n){return n?n[0]:cn}function C(n,t){return r(n,d(t),Bn)}function G(n,t){return Bn(n,typeof t=="function"?t:un)}function J(n){return null==n?0:(n=H(n)?n:nn(n),n.length)}function M(n,t){var r;if(typeof t!="function")throw new TypeError("Expected a function");return n=Pn(n),
-function(){return 0<--n&&(r=t.apply(this,arguments)),1>=n&&(t=cn),r}}function P(n){var t;if(typeof n!="function")throw new TypeError("Expected a function");return t=kn(t===cn?n.length-1:Pn(t),0),function(){for(var r=arguments,e=-1,u=kn(r.length-t,0),o=Array(u);++e<u;)o[e]=r[t+e];for(u=Array(t+1),e=-1;++e<t;)u[e]=r[e];return u[t]=o,n.apply(this,u)}}function U(n,t){return n>t}function V(n){return W(n)&&H(n)&&dn.call(n,"callee")&&(!Nn.call(n,"callee")||"[object Arguments]"==On.call(n))}function H(n){
-return null!=n&&!(typeof n=="function"&&K(n))&&L(In(n))}function K(n){return n=Q(n)?On.call(n):"","[object Function]"==n||"[object GeneratorFunction]"==n}function L(n){return typeof n=="number"&&n>-1&&0==n%1&&9007199254740991>=n}function Q(n){var t=typeof n;return!!n&&("object"==t||"function"==t)}function W(n){return!!n&&typeof n=="object"}function X(n){return typeof n=="number"||W(n)&&"[object Number]"==On.call(n)}function Y(n){return typeof n=="string"||!Mn(n)&&W(n)&&"[object String]"==On.call(n)}
-function Z(n,t){return t>n}function nn(n){var t=q(n);if(!t&&!H(n))return Tn(Object(n));var r,e=$(n),u=e.length,o=!!u;for(r in n)!dn.call(n,r)||o&&a(r,u)||t&&"constructor"==r||e.push(r);return e}function tn(n){for(var t=-1,r=q(n),e=w(n),u=e.length,o=$(n),i=o.length,c=!!i;++t<u;){var f=e[t];c&&a(f,i)||"constructor"==f&&(r||!dn.call(n,f))||o.push(f)}return o}function rn(n,t,r){return t=null==n?cn:n[t],t===cn&&(t=r),K(t)?t.call(n):t}function en(n){return n?u(n,nn(n)):[]}function un(n){return n}function on(t,r,e){
-var u=nn(r),o=b(r,u);null!=e||Q(r)&&(o.length||!u.length)||(e=r,r=t,t=this,o=b(r,nn(r)));var i=Q(e)&&"chain"in e?e.chain:true,c=K(t);return Bn(o,function(e){var u=r[e];t[e]=u,c&&(t.prototype[e]=function(){var r=this.__chain__;if(i||r){var e=t(this.__wrapped__);return(e.__actions__=Rn(this.__actions__)).push({func:u,args:arguments,thisArg:t}),e.__chain__=r,e}return u.apply(t,n([this.value()],arguments))})}),t}var cn,fn=/[&<>"'`]/g,an=RegExp(fn.source),ln=/^(?:0|[1-9]\d*)$/,pn={"&":"&amp;","<":"&lt;",
-">":"&gt;",'"':"&quot;","'":"&#39;","`":"&#96;"},sn={"function":true,object:true},hn=sn[typeof module]&&module&&!module.nodeType?module:null,vn=o(sn[typeof self]&&self),yn=o(sn[typeof window]&&window),_n=o(sn[typeof this]&&this),gn=o((sn[typeof exports]&&exports&&!exports.nodeType?exports:null)&&hn&&typeof global=="object"&&global)||yn!==(_n&&_n.window)&&yn||vn||_n||Function("return this")(),bn=Array.prototype,jn=Object.prototype,mn=String.prototype,dn=jn.hasOwnProperty,wn=0,On=jn.toString,En=gn._,xn=gn.f,An=xn?xn.g:cn,Nn=jn.propertyIsEnumerable,Sn=gn.isFinite,Tn=Object.keys,kn=Math.max,Fn=function(){
-function n(){}return function(t){if(Q(t)){n.prototype=t;var r=new n;n.prototype=cn}return r||{}}}(),Bn=function(n,t){return function(r,e){if(null==r)return r;if(!H(r))return n(r,e);for(var u=r.length,o=t?u:-1,i=Object(r);(t?o--:++o<u)&&false!==e(i[o],o,i););return r}}(g),Dn=function(n){return function(t,r,e){var u=Object(t);e=e(t);for(var o=e.length,i=n?o:-1;n?i--:++i<o;){var c=e[i];if(false===r(u[c],c,u))break}return t}}();An&&!Nn.call({valueOf:1},"valueOf")&&(w=function(n){n=An(n);for(var t,r=[];!(t=n.next()).done;)r.push(t.value);
-return r});var Rn=N,In=A("length"),$n=P(function(t,r){_(r);var e=Mn(t)?t:[Object(t)];return n(Rn(e),en)}),qn=P(function(n,t,r){var e=typeof t=="function";return O(n,function(n){var u=e?t:n[t];return null==u?u:u.apply(n,r)})}),zn=Date.now,Cn=P(function(n,t,r){return B(n,t,r)}),Gn=P(function(n,t){return h(n,1,t)}),Jn=P(function(n,t,r){return h(n,Un(t)||0,r)}),Mn=Array.isArray,Pn=Number,Un=Number,Vn=k(function(n,t){var r=nn(t);i(t,r,n)}),Hn=k(function(n,t){var r=tn(t);i(t,r,n)}),Kn=k(function(n,t,r){
-i(t,tn(t),n,r)}),Ln=P(function(n){return n.push(cn,s),Kn.apply(cn,n)}),Qn=P(function(n,t){return null==n?{}:x(n,_(t))}),Wn=d;p.prototype=Fn(l.prototype),p.prototype.constructor=p,l.assignIn=Hn,l.before=M,l.bind=Cn,l.chain=function(n){return n=l(n),n.__chain__=true,n},l.compact=function(n){return y(n,Boolean)},l.concat=$n,l.create=function(n,t){var r=Fn(n);return t?Vn(r,t):r},l.defaults=Ln,l.defer=Gn,l.delay=Jn,l.filter=function(n,t){return y(n,d(t))},l.flatten=function(n){return n&&n.length?_(n):[];
-},l.flattenDeep=function(n){return n&&n.length?_(n,true):[]},l.functions=function(n){return null==n?[]:b(n,nn(n))},l.invoke=qn,l.iteratee=Wn,l.keys=nn,l.map=function(n,t){return O(n,d(t))},l.mixin=on,l.negate=function(n){if(typeof n!="function")throw new TypeError("Expected a function");return function(){return!n.apply(this,arguments)}},l.once=function(n){return M(2,n)},l.pick=Qn,l.slice=function(n,t,r){return n&&n.length?N(n,t,r):[]},l.sortBy=function(n,t){var r=0;return t=d(t),O(O(n,function(n,e,u){
-return{c:n,b:r++,a:t(n,e,u)}}).sort(function(n,t){var r;n:{r=n.a;var e=t.a;if(r!==e){var u=null===r,o=r===cn,i=r===r,c=null===e,f=e===cn,a=e===e;if(r>e&&!c||!i||u&&!f&&a||o&&a){r=1;break n}if(e>r&&!u||!a||c&&!o&&i||f&&i){r=-1;break n}}r=0}return r||n.b-t.b}),A("c"))},l.tap=function(n,t){return t(n),n},l.thru=function(n,t){return t(n)},l.toArray=function(n){return H(n)?n.length?Rn(n):[]:en(n)},l.values=en,l.each=G,l.extend=Hn,on(l,l),l.clone=function(n){if(Q(n))if(Mn(n))n=Rn(n);else{var t=nn(n);n=i(n,t,void 0);
-}return n},l.escape=function(n){return(n=null==n?"":n+"")&&an.test(n)?n.replace(fn,c):n},l.every=function(n,t,r){return t=r?cn:t,v(n,d(t))},l.find=C,l.forEach=G,l.has=function(n,t){return null!=n&&dn.call(n,t)},l.head=z,l.identity=un,l.indexOf=function(n,t,r){var e=n?n.length:0;r=typeof r=="number"?0>r?kn(e+r,0):r:0,r=(r||0)-1;for(var u=t===t;++r<e;){var o=n[r];if(u?o===t:o!==o)return r}return-1},l.isArguments=V,l.isArray=Mn,l.isBoolean=function(n){return true===n||false===n||W(n)&&"[object Boolean]"==On.call(n);
-},l.isDate=function(n){return W(n)&&"[object Date]"==On.call(n)},l.isEmpty=function(n){return!W(n)||K(n.splice)?!J(n):!nn(n).length},l.isEqual=function(n,t){return j(n,t)},l.isFinite=function(n){return typeof n=="number"&&Sn(n)},l.isFunction=K,l.isNaN=function(n){return X(n)&&n!=+n},l.isNil=function(n){return null==n},l.isNull=function(n){return null===n},l.isNumber=X,l.isObject=Q,l.isRegExp=function(n){return Q(n)&&"[object RegExp]"==On.call(n)},l.isString=Y,l.isUndefined=function(n){return n===cn;
-},l.last=function(n){var t=n?n.length:0;return t?n[t-1]:cn},l.max=function(n){return n&&n.length?t(n,un,U):cn},l.min=function(n){return n&&n.length?t(n,un,Z):cn},l.noConflict=function(){return gn._=En,this},l.noop=function(){},l.now=zn,l.reduce=function(n,t,r){return e(n,d(t),r,3>arguments.length,Bn)},l.result=rn,l.size=J,l.some=function(n,t,r){return t=r?cn:t,S(n,d(t))},l.uniqueId=function(n){var t=++wn;return(null==n?"":n+"")+t},l.first=z,on(l,function(){var n={};return g(l,function(t,r){dn.call(l.prototype,r)||(n[r]=t);
-}),n}(),{chain:false}),l.VERSION="4.0.0-pre",Bn("join pop push replace reverse shift sort splice split unshift".split(" "),function(n){var t=(/^(?:replace|split)$/.test(n)?mn:bn)[n],r=/^(?:push|sort|unshift)$/.test(n)?"tap":"thru",e=/^(?:join|pop|replace|shift)$/.test(n);l.prototype[n]=function(){var n=arguments;return e&&!this.__chain__?t.apply(this.value(),n):this[r](function(r){return t.apply(r,n)})}}),l.prototype.run=l.prototype.toJSON=l.prototype.valueOf=l.prototype.value=function(){return T(this.__wrapped__,this.__actions__);
-},(yn||vn||{})._=l,typeof define=="function"&&typeof define.amd=="object"&&define.amd? define(function(){return l}):gn._=l}).call(this);
\ No newline at end of file
+for(var u=-1,o=t.length;++u<o;){var i=t[u],c=e?e(r[i],n[i],i,r,n):n[i],f=r[i];(c===c?c===f:f!==f)&&(c!==cn||i in r)||(r[i]=c)}return r}function c(n){return pn[n]}function f(n){var t=false;if(null!=n&&typeof n.toString!="function")try{t=!!(n+"")}catch(r){}return t}function a(n,t){return n=typeof n=="number"||ln.test(n)?+n:-1,n>-1&&0==n%1&&(null==t?9007199254740991:t)>n}function l(n){if(X(n)&&!Mn(n)){if(n instanceof p)return n;if(mn.call(n,"__wrapped__")){var t=new p(n.__wrapped__,n.__chain__);return t.__actions__=Rn(n.__actions__),
+t}}return new p(n)}function p(n,t){this.__wrapped__=n,this.__actions__=[],this.__chain__=!!t}function s(n,t,r){return n===cn||n===jn[r]?t:n}function h(n,t,r){if(typeof n!="function")throw new TypeError("Expected a function");return setTimeout(function(){n.apply(cn,r)},t)}function v(n,t){var r=true;return Bn(n,function(n,e,u){return r=!!t(n,e,u)}),r}function y(n,t){var r=[];return Bn(n,function(n,e,u){t(n,e,u)&&r.push(n)}),r}function _(t,r,e,u){u||(u=[]);for(var o=-1,i=t.length;++o<i;){var c=t[o];X(c)&&K(c)&&(e||Mn(c)||H(c))?r?_(c,r,e,u):n(u,c):e||(u[u.length]=c);
+}return u}function g(n,t){return n&&Dn(n,t,tn)}function b(n,t){return y(t,function(t){return L(n[t])})}function j(n,t,r,e,u){return n===t?true:null==n||null==t||!W(n)&&!X(t)?n!==n&&t!==t:d(n,t,j,r,e,u)}function d(n,t,r,e,u,o){var i=Mn(n),c=Mn(t),a="[object Array]",l="[object Array]";i||(a=On.call(n),"[object Arguments]"==a&&(a="[object Object]")),c||(l=On.call(t),"[object Arguments]"==l&&(l="[object Object]"));var p="[object Object]"==a&&!f(n),c="[object Object]"==l&&!f(t);return!(l=a==l)||i||p?2&u||(a=p&&mn.call(n,"__wrapped__"),
+c=c&&mn.call(t,"__wrapped__"),!a&&!c)?l?(o||(o=[]),(a=(a=C(o,function(t){return t[0]===n}))&&a[1])?a==t:(o.push([n,t]),t=(i?D:I)(n,t,r,e,u,o),o.pop(),t)):false:r(a?n.value():n,c?t.value():t,e,u,o):R(n,t,a)}function m(n){var t=typeof n;return"function"==t?n:null==n?un:("object"==t?E:A)(n)}function w(n){n=null==n?n:Object(n);var t,r=[];for(t in n)r.push(t);return r}function O(n,t){var r=-1,e=K(n)?Array(n.length):[];return Bn(n,function(n,u,o){e[++r]=t(n,u,o)}),e}function E(n){var t=tn(n),r=t.length;return function(e){
+if(null==e)return!r;for(e=Object(e);r--;){var u=t[r];if(!(u in e&&j(n[u],e[u],cn,true)))return false}return true}}function x(n,t){return n=Object(n),J(t,function(t,r){return r in n&&(t[r]=n[r]),t},{})}function A(n){return function(t){return null==t?cn:t[n]}}function N(n,t,r){var e=-1,u=n.length;for(t=null==t?0:Pn(t),0>t&&(t=-t>u?0:u+t),r=r===cn||r>u?u:Pn(r),0>r&&(r+=u),u=t>r?0:r-t>>>0,t>>>=0,r=Array(u);++e<u;)r[e]=n[e+t];return r}function S(n,t){var r;return Bn(n,function(n,e,u){return r=t(n,e,u),!r}),!!r;
+}function T(t,r){return J(r,function(t,r){return r.func.apply(r.thisArg,n([t],r.args))},t)}function k(n){return U(function(t,r){var e=-1,u=null==t?0:r.length,o=u>1?r[u-1]:cn,o=typeof o=="function"?(u--,o):cn;for(t=Object(t);++e<u;){var i=r[e];i&&n(t,i,o)}return t})}function F(n){return function(){var t=arguments,r=Fn(n.prototype),t=n.apply(r,t);return W(t)?t:r}}function B(n,t,r){function e(){for(var o=-1,i=arguments.length,c=-1,f=r.length,a=Array(f+i),l=this&&this!==gn&&this instanceof e?u:n;++c<f;)a[c]=r[c];
+for(;i--;)a[c++]=arguments[++o];return l.apply(t,a)}if(typeof n!="function")throw new TypeError("Expected a function");var u=F(n);return e}function D(n,t,r,e,u,o){var i=-1,c=1&u,f=n.length,a=t.length;if(f!=a&&!(2&u&&a>f))return false;for(;++i<f;){var l=n[i],a=t[i];if(void 0!==cn)return false;if(c){if(!S(t,function(n){return l===n||r(l,n,e,u,o)}))return false}else if(l!==a&&!r(l,a,e,u,o))return false}return true}function R(n,t,r){switch(r){case"[object Boolean]":case"[object Date]":return+n==+t;case"[object Error]":
+return n.name==t.name&&n.message==t.message;case"[object Number]":return n!=+n?t!=+t:n==+t;case"[object RegExp]":case"[object String]":return n==t+""}return false}function I(n,t,r,e,u,o){var i=2&u,c=1&u,f=tn(n),a=f.length,l=tn(t);if(a!=l.length&&!i)return false;for(var p=a;p--;){var s=f[p];if(!(i?s in t:mn.call(t,s))||!c&&s!=l[p])return false}for(;++p<a;){if(s=f[p],c=n[s],l=t[s],void 0!==cn||c!==l&&!r(c,l,e,u,o))return false;i||(i="constructor"==s)}return i||(r=n.constructor,e=t.constructor,!(r!=e&&"constructor"in n&&"constructor"in t)||typeof r=="function"&&r instanceof r&&typeof e=="function"&&e instanceof e)?true:false;
+}function $(n){var t=n?n.length:cn;if(Q(t)&&(Mn(n)||Z(n)||H(n))){n=String;for(var r=-1,e=Array(t);++r<t;)e[r]=n(r);t=e}else t=null;return t}function q(n){var t=n&&n.constructor;return n===(typeof t=="function"&&t.prototype||jn)}function z(n){return n?n[0]:cn}function C(n,t){return r(n,m(t),Bn)}function G(n,t){return Bn(n,typeof t=="function"?t:un)}function J(n,t,r){return e(n,m(t),r,3>arguments.length,Bn)}function M(n){return null==n?0:(n=K(n)?n:tn(n),n.length)}function P(n,t){var r;if(typeof t!="function")throw new TypeError("Expected a function");
+return n=Pn(n),function(){return 0<--n&&(r=t.apply(this,arguments)),1>=n&&(t=cn),r}}function U(n){var t;if(typeof n!="function")throw new TypeError("Expected a function");return t=kn(t===cn?n.length-1:Pn(t),0),function(){for(var r=arguments,e=-1,u=kn(r.length-t,0),o=Array(u);++e<u;)o[e]=r[t+e];for(u=Array(t+1),e=-1;++e<t;)u[e]=r[e];return u[t]=o,n.apply(this,u)}}function V(n,t){return n>t}function H(n){return X(n)&&K(n)&&mn.call(n,"callee")&&(!Nn.call(n,"callee")||"[object Arguments]"==On.call(n));
+}function K(n){return null!=n&&!(typeof n=="function"&&L(n))&&Q(In(n))}function L(n){return n=W(n)?On.call(n):"","[object Function]"==n||"[object GeneratorFunction]"==n}function Q(n){return typeof n=="number"&&n>-1&&0==n%1&&9007199254740991>=n}function W(n){var t=typeof n;return!!n&&("object"==t||"function"==t)}function X(n){return!!n&&typeof n=="object"}function Y(n){return typeof n=="number"||X(n)&&"[object Number]"==On.call(n)}function Z(n){return typeof n=="string"||!Mn(n)&&X(n)&&"[object String]"==On.call(n);
+}function nn(n,t){return t>n}function tn(n){var t=q(n);if(!t&&!K(n))return Tn(Object(n));var r,e=$(n),u=!!e,e=e||[],o=e.length;for(r in n)!mn.call(n,r)||u&&("length"==r||a(r,o))||t&&"constructor"==r||e.push(r);return e}function rn(n){for(var t=-1,r=q(n),e=w(n),u=e.length,o=$(n),i=!!o,o=o||[],c=o.length;++t<u;){var f=e[t];i&&("length"==f||a(f,c))||"constructor"==f&&(r||!mn.call(n,f))||o.push(f)}return o}function en(n){return n?u(n,tn(n)):[]}function un(n){return n}function on(t,r,e){var u=tn(r),o=b(r,u);
+null!=e||W(r)&&(o.length||!u.length)||(e=r,r=t,t=this,o=b(r,tn(r)));var i=W(e)&&"chain"in e?e.chain:true,c=L(t);return Bn(o,function(e){var u=r[e];t[e]=u,c&&(t.prototype[e]=function(){var r=this.__chain__;if(i||r){var e=t(this.__wrapped__);return(e.__actions__=Rn(this.__actions__)).push({func:u,args:arguments,thisArg:t}),e.__chain__=r,e}return u.apply(t,n([this.value()],arguments))})}),t}var cn,fn=/[&<>"'`]/g,an=RegExp(fn.source),ln=/^(?:0|[1-9]\d*)$/,pn={"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;",
+"'":"&#39;","`":"&#96;"},sn={"function":true,object:true},hn=sn[typeof module]&&module&&!module.nodeType?module:null,vn=o(sn[typeof self]&&self),yn=o(sn[typeof window]&&window),_n=o(sn[typeof this]&&this),gn=o((sn[typeof exports]&&exports&&!exports.nodeType?exports:null)&&hn&&typeof global=="object"&&global)||yn!==(_n&&_n.window)&&yn||vn||_n||Function("return this")(),bn=Array.prototype,jn=Object.prototype,dn=String.prototype,mn=jn.hasOwnProperty,wn=0,On=jn.toString,En=gn._,xn=gn.f,An=xn?xn.g:cn,Nn=jn.propertyIsEnumerable,Sn=gn.isFinite,Tn=Object.keys,kn=Math.max,Fn=function(){
+function n(){}return function(t){if(W(t)){n.prototype=t;var r=new n;n.prototype=cn}return r||{}}}(),Bn=function(n,t){return function(r,e){if(null==r)return r;if(!K(r))return n(r,e);for(var u=r.length,o=t?u:-1,i=Object(r);(t?o--:++o<u)&&false!==e(i[o],o,i););return r}}(g),Dn=function(n){return function(t,r,e){var u=Object(t);e=e(t);for(var o=e.length,i=n?o:-1;n?i--:++i<o;){var c=e[i];if(false===r(u[c],c,u))break}return t}}();An&&!Nn.call({valueOf:1},"valueOf")&&(w=function(n){n=An(n);for(var t,r=[];!(t=n.next()).done;)r.push(t.value);
+return r});var Rn=N,In=A("length"),$n=U(function(t,r){_(r);var e=Mn(t)?t:[Object(t)];return n(Rn(e),en)}),qn=U(function(n,t,r){var e=typeof t=="function";return O(n,function(n){var u=e?t:n[t];return null==u?u:u.apply(n,r)})}),zn=Date.now,Cn=U(function(n,t,r){return B(n,t,r)}),Gn=U(function(n,t){return h(n,1,t)}),Jn=U(function(n,t,r){return h(n,Un(t)||0,r)}),Mn=Array.isArray,Pn=Number,Un=Number,Vn=k(function(n,t){var r=tn(t);i(t,r,n)}),Hn=k(function(n,t){var r=rn(t);i(t,r,n)}),Kn=k(function(n,t,r){
+i(t,rn(t),n,r)}),Ln=U(function(n){return n.push(cn,s),Kn.apply(cn,n)}),Qn=U(function(n,t){return null==n?{}:x(n,_(t))}),Wn=m;p.prototype=Fn(l.prototype),p.prototype.constructor=p,l.assignIn=Hn,l.before=P,l.bind=Cn,l.chain=function(n){return n=l(n),n.__chain__=true,n},l.compact=function(n){return y(n,Boolean)},l.concat=$n,l.create=function(n,t){var r=Fn(n);return t?Vn(r,t):r},l.defaults=Ln,l.defer=Gn,l.delay=Jn,l.filter=function(n,t){return y(n,m(t))},l.flatten=function(n){return n&&n.length?_(n):[];
+},l.flattenDeep=function(n){return n&&n.length?_(n,true):[]},l.functions=function(n){return null==n?[]:b(n,tn(n))},l.invoke=qn,l.iteratee=Wn,l.keys=tn,l.map=function(n,t){return O(n,m(t))},l.mixin=on,l.negate=function(n){if(typeof n!="function")throw new TypeError("Expected a function");return function(){return!n.apply(this,arguments)}},l.once=function(n){return P(2,n)},l.pick=Qn,l.slice=function(n,t,r){return n&&n.length?N(n,t,r):[]},l.sortBy=function(n,t){var r=0;return t=m(t),O(O(n,function(n,e,u){
+return{c:n,b:r++,a:t(n,e,u)}}).sort(function(n,t){var r;n:{r=n.a;var e=t.a;if(r!==e){var u=null===r,o=r===cn,i=r===r,c=null===e,f=e===cn,a=e===e;if(r>e&&!c||!i||u&&!f&&a||o&&a){r=1;break n}if(e>r&&!u||!a||c&&!o&&i||f&&i){r=-1;break n}}r=0}return r||n.b-t.b}),A("c"))},l.tap=function(n,t){return t(n),n},l.thru=function(n,t){return t(n)},l.toArray=function(n){return K(n)?n.length?Rn(n):[]:en(n)},l.values=en,l.each=G,l.extend=Hn,on(l,l),l.clone=function(n){if(W(n))if(Mn(n))n=Rn(n);else{var t=tn(n);n=i(n,t,void 0);
+}return n},l.escape=function(n){return(n=null==n?"":n+"")&&an.test(n)?n.replace(fn,c):n},l.every=function(n,t,r){return t=r?cn:t,v(n,m(t))},l.find=C,l.forEach=G,l.has=function(n,t){return null!=n&&mn.call(n,t)},l.head=z,l.identity=un,l.indexOf=function(n,t,r){var e=n?n.length:0;r=typeof r=="number"?0>r?kn(e+r,0):r:0,r=(r||0)-1;for(var u=t===t;++r<e;){var o=n[r];if(u?o===t:o!==o)return r}return-1},l.isArguments=H,l.isArray=Mn,l.isBoolean=function(n){return true===n||false===n||X(n)&&"[object Boolean]"==On.call(n);
+},l.isDate=function(n){return X(n)&&"[object Date]"==On.call(n)},l.isEmpty=function(n){return!X(n)||L(n.splice)?!M(n):!tn(n).length},l.isEqual=function(n,t){return j(n,t)},l.isFinite=function(n){return typeof n=="number"&&Sn(n)},l.isFunction=L,l.isNaN=function(n){return Y(n)&&n!=+n},l.isNil=function(n){return null==n},l.isNull=function(n){return null===n},l.isNumber=Y,l.isObject=W,l.isRegExp=function(n){return W(n)&&"[object RegExp]"==On.call(n)},l.isString=Z,l.isUndefined=function(n){return n===cn;
+},l.last=function(n){var t=n?n.length:0;return t?n[t-1]:cn},l.max=function(n){return n&&n.length?t(n,un,V):cn},l.min=function(n){return n&&n.length?t(n,un,nn):cn},l.noConflict=function(){return gn._=En,this},l.noop=function(){},l.now=zn,l.reduce=J,l.result=function(n,t,r){return t=null==n?cn:n[t],t===cn&&(t=r),L(t)?t.call(n):t},l.size=M,l.some=function(n,t,r){return t=r?cn:t,S(n,m(t))},l.uniqueId=function(n){var t=++wn;return(null==n?"":n+"")+t},l.first=z,on(l,function(){var n={};return g(l,function(t,r){
+mn.call(l.prototype,r)||(n[r]=t)}),n}(),{chain:false}),l.VERSION="4.0.0-pre",Bn("pop join reverse push replace shift sort splice split unshift".split(" "),function(n){var t=(/^(?:replace|split)$/.test(n)?dn:bn)[n],r=/^(?:push|sort|unshift)$/.test(n)?"tap":"thru",e=/^(?:pop|join|replace|shift)$/.test(n);l.prototype[n]=function(){var n=arguments;return e&&!this.__chain__?t.apply(this.value(),n):this[r](function(r){return t.apply(r,n)})}}),l.prototype.run=l.prototype.toJSON=l.prototype.valueOf=l.prototype.value=function(){
+return T(this.__wrapped__,this.__actions__)},(yn||vn||{})._=l,typeof define=="function"&&typeof define.amd=="object"&&define.amd? define(function(){return l}):gn._=l}).call(this);
\ No newline at end of file