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function(e){"use strict";function t(e){if(this._capacity=r(e),this._length=0,this._front=0,this._makeCapacity(),n(e)){for(var t=e.length,i=0;i<t;++i)this[i]=e[i];this._length=t}}t.prototype.toArray=function(){for(var e=this._length,t=Array(e),n=this._front,i=this._capacity,r=0;r<e;++r)t[r]=this[n+r&i-1];return t},t.prototype.push=function(e){var t=arguments.length,n=this._length;if(t>1){var i=this._capacity;if(n+t>i){for(var r=0;r<t;++r){this._checkCapacity(n+1);var s=this._front+n&this._capacity-1;this[s]=arguments[r],n++,this._length=n}return n}for(var s=this._front,r=0;r<t;++r)this[s+n&i-1]=arguments[r],s++;return this._length=n+t,n+t}if(0===t)return n;this._checkCapacity(n+1);var r=this._front+n&this._capacity-1;return this[r]=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 i=this._capacity;if(t+n>i){for(var r=n-1;r>=0;r--){this._checkCapacity(t+1);var i=this._capacity,s=(this._front-1&i-1^i)-i;this[s]=arguments[r],t++,this._length=t,this._front=s}return t}for(var a=this._front,r=n-1;r>=0;r--){var s=(a-1&i-1^i)-i;this[s]=arguments[r],a=s}return this._front=a,this._length=t+n,t+n}if(0===n)return t;this._checkCapacity(t+1);var i=this._capacity,r=(this._front-1&i-1^i)-i;return this[r]=e,this._length=t+1,this._front=r,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(r(1.5*this._capacity+16))},t.prototype._resizeTo=function(e){var t=this._front,n=this._capacity,r=Array(n),s=this._length;if(i(this,0,r,0,n),this._capacity=e,this._makeCapacity(),this._front=0,t+s<=n)i(r,t,this,0,s);else{var a=s-(t+s&n-1);i(r,t,this,0,a),i(r,0,this,a,s-a)}};var n=Array.isArray;function i(e,t,n,i,r){for(var s=0;s<r;++s)n[s+i]=e[s+t]}function r(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}