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function(e){"use strict";function t(e){if(this._capacity=i(e),this._length=0,this._front=0,this._makeCapacity(),n(e)){for(var t=e.length,r=0;r<t;++r)this[r]=e[r];this._length=t}}t.prototype.toArray=function(){for(var e=this._length,t=Array(e),n=this._front,r=this._capacity,i=0;i<e;++i)t[i]=this[n+i&r-1];return t},t.prototype.push=function(e){var t=arguments.length,n=this._length;if(t>1){var r=this._capacity;if(n+t>r){for(var i=0;i<t;++i){this._checkCapacity(n+1);var a=this._front+n&this._capacity-1;this[a]=arguments[i],n++,this._length=n}return n}for(var a=this._front,i=0;i<t;++i)this[a+n&r-1]=arguments[i],a++;return this._length=n+t,n+t}if(0===t)return n;this._checkCapacity(n+1);var i=this._front+n&this._capacity-1;return this[i]=e,this._length=n+1,n+1},t.prototype.pop=function(){var e=this._length;if(0!==e){var t=this._front+e-1&this._capacity-1,n=this[t];return this[t]=void 0,this._length=e-1,n}},t.prototype.shift=function(){var e=this._length;if(0!==e){var t=this._front,n=this[t];return this[t]=void 0,this._front=t+1&this._capacity-1,this._length=e-1,n}},t.prototype.unshift=function(e){var t=this._length,n=arguments.length;if(n>1){var r=this._capacity;if(t+n>r){for(var i=n-1;i>=0;i--){this._checkCapacity(t+1);var r=this._capacity,a=(this._front-1&r-1^r)-r;this[a]=arguments[i],t++,this._length=t,this._front=a}return t}for(var o=this._front,i=n-1;i>=0;i--){var a=(o-1&r-1^r)-r;this[a]=arguments[i],o=a}return this._front=o,this._length=t+n,t+n}if(0===n)return t;this._checkCapacity(t+1);var r=this._capacity,i=(this._front-1&r-1^r)-r;return this[i]=e,this._length=t+1,this._front=i,t+1},t.prototype.peekBack=function(){var e=this._length;if(0!==e)return this[this._front+e-1&this._capacity-1]},t.prototype.peekFront=function(){if(0!==this._length)return this[this._front]},t.prototype.get=function(e){var t=e;if(t===(0|t)){var n=this._length;if(t<0&&(t+=n),!(t<0)&&!(t>=n))return this[this._front+t&this._capacity-1]}},t.prototype.isEmpty=function(){return 0===this._length},t.prototype.clear=function(){this._length=0,this._front=0,this._makeCapacity()},t.prototype.toString=function(){return this.toArray().toString()},t.prototype.valueOf=t.prototype.toString,t.prototype.removeFront=t.prototype.shift,t.prototype.removeBack=t.prototype.pop,t.prototype.insertFront=t.prototype.unshift,t.prototype.insertBack=t.prototype.push,t.prototype.enqueue=t.prototype.push,t.prototype.dequeue=t.prototype.shift,t.prototype.toJSON=t.prototype.toArray,Object.defineProperty(t.prototype,"length",{get:function(){return this._length},set:function(){throw RangeError("")}}),t.prototype._makeCapacity=function(){for(var e=this._capacity,t=0;t<e;++t)this[t]=void 0},t.prototype._checkCapacity=function(e){this._capacity<e&&this._resizeTo(i(1.5*this._capacity+16))},t.prototype._resizeTo=function(e){var t=this._front,n=this._capacity,i=Array(n),a=this._length;if(r(this,0,i,0,n),this._capacity=e,this._makeCapacity(),this._front=0,t+a<=n)r(i,t,this,0,a);else{var o=a-(t+a&n-1);r(i,t,this,0,o),r(i,0,this,o,a-o)}};var n=Array.isArray;function r(e,t,n,r,i){for(var a=0;a<i;++a)n[a+r]=e[a+t]}function i(e){var t;if("number"!=typeof e)if(!n(e))return 16;else e=e.length;return t=(Math.min(Math.max(16,e),0x40000000)>>>0)-1,t|=t>>1,t|=t>>2,t|=t>>4,t|=t>>8,(t|=t>>16)+1}e.exports=t}