var f=r;r.Node=s;r.create=r;function r(t){var i=this;if(i instanceof r||(i=new r),i.tail=null,i.head=null,i.length=0,t&&typeof t.forEach=="function")t.forEach(function(n){i.push(n)});else if(arguments.length>0)for(var e=0,h=arguments.length;e<h;e++)i.push(arguments[e]);return i}r.prototype.removeNode=function(t){if(t.list!==this)throw new Error("removing node which does not belong to this list");var i=t.next,e=t.prev;return i&&(i.prev=e),e&&(e.next=i),t===this.head&&(this.head=i),t===this.tail&&(this.tail=e),t.list.length--,t.next=null,t.prev=null,t.list=null,i};r.prototype.unshiftNode=function(t){if(t!==this.head){t.list&&t.list.removeNode(t);var i=this.head;t.list=this,t.next=i,i&&(i.prev=t),this.head=t,this.tail||(this.tail=t),this.length++}};r.prototype.pushNode=function(t){if(t!==this.tail){t.list&&t.list.removeNode(t);var i=this.tail;t.list=this,t.prev=i,i&&(i.next=t),this.tail=t,this.head||(this.head=t),this.length++}};r.prototype.push=function(){for(var t=0,i=arguments.length;t<i;t++)a(this,arguments[t]);return this.length};r.prototype.unshift=function(){for(var t=0,i=arguments.length;t<i;t++)v(this,arguments[t]);return this.length};r.prototype.pop=function(){if(!!this.tail){var t=this.tail.value;return this.tail=this.tail.prev,this.tail?this.tail.next=null:this.head=null,this.length--,t}};r.prototype.shift=function(){if(!!this.head){var t=this.head.value;return this.head=this.head.next,this.head?this.head.prev=null:this.tail=null,this.length--,t}};r.prototype.forEach=function(t,i){i=i||this;for(var e=this.head,h=0;e!==null;h++)t.call(i,e.value,h,this),e=e.next};r.prototype.forEachReverse=function(t,i){i=i||this;for(var e=this.tail,h=this.length-1;e!==null;h--)t.call(i,e.value,h,this),e=e.prev};r.prototype.get=function(t){for(var i=0,e=this.head;e!==null&&i<t;i++)e=e.next;if(i===t&&e!==null)return e.value};r.prototype.getReverse=function(t){for(var i=0,e=this.tail;e!==null&&i<t;i++)e=e.prev;if(i===t&&e!==null)return e.value};r.prototype.map=function(t,i){i=i||this;for(var e=new r,h=this.head;h!==null;)e.push(t.call(i,h.value,this)),h=h.next;return e};r.prototype.mapReverse=function(t,i){i=i||this;for(var e=new r,h=this.tail;h!==null;)e.push(t.call(i,h.value,this)),h=h.prev;return e};r.prototype.reduce=function(t,i){var e,h=this.head;if(arguments.length>1)e=i;else if(this.head)h=this.head.next,e=this.head.value;else throw new TypeError("Reduce of empty list with no initial value");for(var n=0;h!==null;n++)e=t(e,h.value,n),h=h.next;return e};r.prototype.reduceReverse=function(t,i){var e,h=this.tail;if(arguments.length>1)e=i;else if(this.tail)h=this.tail.prev,e=this.tail.value;else throw new TypeError("Reduce of empty list with no initial value");for(var n=this.length-1;h!==null;n--)e=t(e,h.value,n),h=h.prev;return e};r.prototype.toArray=function(){for(var t=new Array(this.length),i=0,e=this.head;e!==null;i++)t[i]=e.value,e=e.next;return t};r.prototype.toArrayReverse=function(){for(var t=new Array(this.length),i=0,e=this.tail;e!==null;i++)t[i]=e.value,e=e.prev;return t};r.prototype.slice=function(t,i){i=i||this.length,i<0&&(i+=this.length),t=t||0,t<0&&(t+=this.length);var e=new r;if(i<t||i<0)return e;t<0&&(t=0),i>this.length&&(i=this.length);for(var h=0,n=this.head;n!==null&&h<t;h++)n=n.next;for(;n!==null&&h<i;h++,n=n.next)e.push(n.value);return e};r.prototype.sliceReverse=function(t,i){i=i||this.length,i<0&&(i+=this.length),t=t||0,t<0&&(t+=this.length);var e=new r;if(i<t||i<0)return e;t<0&&(t=0),i>this.length&&(i=this.length);for(var h=this.length,n=this.tail;n!==null&&h>i;h--)n=n.prev;for(;n!==null&&h>t;h--,n=n.prev)e.push(n.value);return e};r.prototype.splice=function(t,i,...e){t>this.length&&(t=this.length-1),t<0&&(t=this.length+t);for(var h=0,n=this.head;n!==null&&h<t;h++)n=n.next;for(var u=[],h=0;n&&h<i;h++)u.push(n.value),n=this.removeNode(n);n===null&&(n=this.tail),n!==this.head&&n!==this.tail&&(n=n.prev);for(var h=0;h<e.length;h++)n=l(this,n,e[h]);return u};r.prototype.reverse=function(){for(var t=this.head,i=this.tail,e=t;e!==null;e=e.prev){var h=e.prev;e.prev=e.next,e.next=h}return this.head=i,this.tail=t,this};function l(t,i,e){var h=i===t.head?new s(e,null,i,t):new s(e,i,i.next,t);return h.next===null&&(t.tail=h),h.prev===null&&(t.head=h),t.length++,h}function a(t,i){t.tail=new s(i,t.tail,null,t),t.head||(t.head=t.tail),t.length++}function v(t,i){t.head=new s(i,null,t.head,t),t.tail||(t.tail=t.head),t.length++}function s(t,i,e,h){if(!(this instanceof s))return new s(t,i,e,h);this.list=h,this.value=t,i?(i.next=this,this.prev=i):this.prev=null,e?(e.prev=this,this.next=e):this.next=null}try{require("./iterator.js")(r)}catch{}export{f as y};