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strict';\nvar ctx = require('./_ctx');\nvar $export = require('./_export');\nvar toObject = require('./_to-object');\nvar call = require('./_iter-call');\nvar isArrayIter = require('./_is-array-iter');\nvar toLength = require('./_to-length');\nvar createProperty = require('./_create-property');\nvar getIterFn = require('./core.get-iterator-method');\n\n$export($export.S + $export.F * !require('./_iter-detect')(function (iter) { Array.from(iter); }), 'Array', {\n  // 22.1.2.1 Array.from(arrayLike, mapfn = undefined, thisArg = undefined)\n  from: function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {\n    var O = toObject(arrayLike);\n    var C = typeof this == 'function' ? this : Array;\n    var aLen = arguments.length;\n    var mapfn = aLen > 1 ? arguments[1] : undefined;\n    var mapping = mapfn !== undefined;\n    var index = 0;\n    var iterFn = getIterFn(O);\n    var length, result, step, iterator;\n    if (mapping) mapfn = ctx(mapfn, aLen > 2 ? arguments[2] : 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define(function toString() {\n    var R = anObject(this);\n    return '/'.concat(R.source, '/',\n      'flags' in R ? R.flags : !DESCRIPTORS && R instanceof RegExp ? $flags.call(R) : undefined);\n  });\n// FF44- RegExp#toString has a wrong name\n} else if ($toString.name != TO_STRING) {\n  define(function toString() {\n    return $toString.call(this);\n  });\n}\n","// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window\nvar toIObject = require('./_to-iobject');\nvar gOPN = require('./_object-gopn').f;\nvar toString = {}.toString;\n\nvar windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames\n  ? Object.getOwnPropertyNames(window) : [];\n\nvar getWindowNames = function (it) {\n  try {\n    return gOPN(it);\n  } catch (e) {\n    return windowNames.slice();\n  }\n};\n\nmodule.exports.f = function getOwnPropertyNames(it) {\n  return windowNames && toString.call(it) == '[object Window]' ? getWindowNames(it) : gOPN(toIObject(it));\n};\n","/*export function makeResponsive(board) {\r\n    let resizeFunction = function() {\r\n        board.resizeContainer(board.containerObj.clientWidth,\r\n                              board.containerObj.clientHeight,\r\n                              true);\r\n        board.fullUpdate();\r\n    };\r\n    window.addEventListener(\"resize\", resizeFunction);\r\n}*/\r\nexport function placeLogo(board)\r\n{\r\n  const imageAttributes ={\r\n   opacity:1,\r\n   fixed:true,\r\n   rotate:0,\r\n  };\r\n  const boundingBox = board.attr.boundingbox;\r\n  const size =(boundingBox[2]-boundingBox[0])/10;\r\n  let im =board.create('image', ['/assets/logo.png', [boundingBox[2]-size, boundingBox[1]-size],[size,size]], imageAttributes);\r\n  return im;\r\n}\r\n////////////////////////////////////////\r\nexport function makeResponsive(board) {\r\n    let resizeFunction = function() {\r\n        const bb = board.attr.boundingbox;\r\n        board.resizeContainer(board.containerObj.clientWidth,\r\n                              board.containerObj.clientHeight,\r\n                              true,\r\n                              true);\r\n        board.setBoundingBox(bb);\r\n        board.fullUpdate();\r\n    };\r\n    window.addEventListener(\"resize\", resizeFunction);\r\n}\r\n////////////////////////////////////////PLACE ANGLE/////////////////////////////\r\nexport function placeAngle(board, Pt1, Pt2, Pt3, width, cols){\r\n  const lm = {\r\n    radius:width,\r\n    strokeWidth:0,\r\n    strokeColor:cols,\r\n    fillColor:cols,\r\n    highlight:false,\r\n    radiusPoint:{visible:false},\r\n    label:{color:'black', anchorX:'middle', anchorY:'middle', fontSize:function(){return 18*board.canvasHeight/800},\r\n    cssStyle:'fontFamily:Oswald;'}\r\n    }\r\n  let le=board.create('angle', [Pt1, Pt2, Pt3], lm);\r\n  le.setAttribute({center:{visible:false}, radiusPoint:{visible:false}, anglePoint:{visible:false}});\r\n  return le;\r\n}\r\n///////////////////////////////////////////LINE////////////////////////////////\r\nexport function placeLine(board, Pt1, Pt2, width, cols){\r\n  const lm ={\r\n  fixed:true,\r\n  strokeColor:cols,\r\n  highlight:false,\r\n  strokeWidth: () => Math.round(width*board.canvasWidth /800.)};\r\n  let le=board.create('segment', [[Pt1[0], Pt1[1]],[Pt2[0], Pt2[1]]] , lm);\r\n  return le;\r\n}\r\n/////////////////////////////////////////////////////////////////////////////\r\nexport function placeDash(board, Pt1, Pt2, width, cols){\r\n  const lm ={\r\n  fixed:true,\r\n  dash:1,\r\n  strokeColor:cols,\r\n  highlight:false,\r\n  strokeWidth: () => Math.round(width*board.canvasWidth /800.)};\r\n  let le=board.create('segment', [[Pt1[0], Pt1[1]],[Pt2[0], Pt2[1]]] , lm);\r\n  return le;\r\n}\r\n///////////////////////////////////////////CIRCLE/////////////////////////\r\nexport function placeCircle(board, Pt1, Pt2, width, cols){\r\n  const lm ={\r\n  fixed:true,\r\n  strokeColor:cols,\r\n  fillColor:'white',\r\n  fillOpacity:1,\r\n  highlight:false,\r\n  strokeWidth: () => Math.round(width*board.canvasWidth /800.)};\r\n  let le=board.create('circle', [[Pt1[0], Pt1[1]],[Pt2[0], Pt2[1]]] , lm);\r\n  return le;\r\n}\r\n///// Arc\r\nexport function placeArc(board, Pt1, Pt2, Pt3, width, cols){\r\n  const lm ={\r\n  fixed:true,\r\n  dash:1,\r\n  strokeColor:cols,\r\n  fillOpacity:1,\r\n  highlight:false,\r\n  strokeWidth: () => Math.round(width*board.canvasWidth /800.)};\r\n  let le=board.create('arc', [[Pt1[0], Pt1[1]],[Pt2[0], Pt2[1]],[Pt3[0], Pt3[1]]], lm);\r\n  le.setAttribute({center:{visible:false}, radiusPoint:{visible:false}, anglePoint:{visible:false}});\r\n  return le;\r\n}\r\n//////////////////////////////////////TEXT/////////////////////////////\r\nexport function placeText(board, positionX, positionY, message){\r\n  const m ={\r\n  anchorX: 'middle',\r\n  //display: 'internal',\r\n  highlight: false,\r\n  fixed: true,\r\n  anchorY: 'middle',\r\n  CssStyle: 'fontFamily:Oswald;',\r\n  highlight:false,\r\n  fontSize: () => Math.round(24*board.canvasWidth /800.)};\r\n  let ele =board.create('text', [positionX, positionY, message], m)\r\n  return ele;\r\n}\r\nexport function placeLeftText(board, positionX, positionY, message){\r\n  const m ={\r\n  anchorX: 'left',\r\n  display: 'internal',\r\n  highlight: false,\r\n  fixed: true,\r\n  anchorY: 'middle',\r\n  CssStyle: 'fontFamily:Oswald;',\r\n  highlight:false,\r\n  fontSize: () => Math.round(24*board.canvasWidth /800.)};\r\n  let ele =board.create('text', [positionX, positionY, message], m)\r\n  return ele;\r\n}\r\nexport function placeRightText(board, positionX, positionY, message){\r\n  const m ={\r\n  anchorX: 'right',\r\n  display: 'internal',\r\n  highlight: false,\r\n  fixed: true,\r\n  anchorY: 'middle',\r\n  CssStyle: 'fontFamily:Oswald;',\r\n  highlight:false,\r\n  fontSize: () => Math.round(24*board.canvasWidth /800.)};\r\n  let ele =board.create('text', [positionX, positionY, message], m)\r\n  return ele;\r\n}\r\nexport function placeBoldText(board, positionX, positionY, message){\r\n  const m ={\r\n  anchorX: 'middle',\r\n  display: 'internal',\r\n  highlight: false,\r\n  fixed: true,\r\n  anchorY: 'middle',\r\n  CssStyle: 'fontFamily:Oswald;fontWeight:bold',\r\n  highlight:false,\r\n  fontSize: () => Math.round(24*board.canvasWidth /800.)};\r\n  let ele =board.create('text', [positionX, positionY, message], m)\r\n  return ele;\r\n}\r\n/////////////////////////// Draggable Point/////////////////////////////////////\r\nexport function dragMe(board, positionX, positionY){\r\n   const pointAttributes ={\r\n    name:'Drag me',\r\n    size:3,\r\n    strokeColor:'black',\r\n    fillColor:'white',\r\n    fixed:false,\r\n    label:{color:'blue',\r\n           offset:[0,20],\r\n           cssStyle:'fontFamily:Oswald',\r\n           fontSize:()=>Math.round(16*board.canvasWidth/800.)\r\n          }\r\n   };\r\n   let pt = board.create('point',[positionX, positionY], pointAttributes);\r\n   return [pt];\r\n   }\r\n//////////////////////////HiddenPoint////////////////////////////////////////\r\nexport function hiddenPt(board, positionX, positionY){\r\n   const pointAttributes ={\r\n    name:'Drag me',\r\n    size:3,\r\n    strokeColor:'black',\r\n    fillColor:'white',\r\n    fixed:false,\r\n    visible:false,\r\n    label:{color:'blue',\r\n           offset:[0,20],\r\n           cssStyle:'fontFamily:Oswald',\r\n           fontSize:()=>Math.round(16*board.canvasWidth/800.)\r\n          }\r\n   };\r\n   let pt = board.create('point',[positionX, positionY], pointAttributes);\r\n   return pt;\r\n   }\r\n///////////////////////////FixedPoint/////////////////////////////////////////\r\nexport function fixedPt(board, positionX, positionY, size, name, cols1, cols2){\r\n   const pointAttributes ={\r\n    name:name,\r\n    size: ()=>Math.round(size*board.canvasWidth/800.),\r\n    strokeWidth:()=>Math.ceil(2*board.canvasWidth/800.),\r\n    fillColor:cols1,\r\n    strokeColor:cols2,\r\n    highlight:false,\r\n    fixed:true,\r\n    label:{color:'blue',\r\n           offset:[0,20],\r\n           cssStyle:'fontFamily:Oswald',\r\n           fontSize:()=>Math.round(16*board.canvasWidth/800.)\r\n          }\r\n   };\r\n   let pt = board.create('point',[positionX, positionY], pointAttributes);\r\n   return pt;\r\n   }\r\n/////////////////////////////////////////////////////////////////////////////\r\nexport function placeArrow(board, pt1, pt2, width, cols){\r\n     const recAttributes = {\r\n       strokeWidth: () => Math.round(width*board.canvasWidth/800.),\r\n       strokeColor:cols,\r\n       highlight:false,\r\n       fillOpacity:1.0}\r\n     let m =board.create('arrow', [[pt1[0], pt1[1]],\r\n                                    [pt2[0], pt2[1]]], recAttributes);\r\n     return m;\r\n   }\r\n///////////////////////////////////////////////////////////////////////////\r\nexport function placePoint(board, positionX, positionY, size, cols1, cols2){\r\n     const ptA = {\r\n       name:'',\r\n       size: ()=>Math.round(size*board.canvasWidth/800.),\r\n       strokeWidth:()=>Math.ceil(2*board.canvasWidth/800.),\r\n       fillColor:cols1,\r\n       strokeColor:cols2,\r\n       highlight:false};\r\n     let ptM =board.create('point', [positionX, positionY], ptA);\r\n     return ptM;\r\n   }\r\n//////////////////////////////Gravity ////////////////////////////////////////\r\nexport function placeGlider(board, line, positionX, positionY, size, cols1, cols2){\r\n     const ptA = {\r\n       name:'',\r\n       size: ()=>Math.round(size*board.canvasWidth/800.),\r\n       strokeWidth:()=>Math.ceil(2*board.canvasWidth/800.),\r\n       fillColor:cols1,\r\n       strokeColor:cols2,\r\n       highlight:false};\r\n     let ptM =board.create('glider', [positionX, positionY, line], ptA);\r\n     return ptM;\r\n   }\r\n//////////////////////////////////////////////////////////////////////////////////\r\n export function placeGravity(board, pt1, pt2, val)\r\n {\r\n     const arrowAttributes = {\r\n       fixed:true,\r\n       highlight:false,\r\n       strokeWidth: () => Math.round(3*board.canvasWidth/800.),\r\n       strokeColor:'black',\r\n       fillOpacity:1.0\r\n     };\r\n     const gAttributes={\r\n       fixed:true,\r\n       highlight:false,\r\n       anchorX: 'left',\r\n       anchorY:'middle',\r\n       color:'black',\r\n       CssStyle: 'font-weight: bold; fontFamily: Oswald;',\r\n       fontSize: () => Math.round(24*board.canvasWidth /800.)\r\n     };\r\n     let gtext =board.create('text', [0.5*(pt1[0]+pt2[0])+Math.abs(pt1[1]-pt2[1])*0.25, 0.5*(pt1[1]+pt2[1])+Math.abs(pt1[0]-pt2[0])*0.25, val], gAttributes);\r\n     let garrow=board.create('arrow', [\r\n                                     [pt1[0], pt1[1]],\r\n                                     [pt2[0], pt2[1]]\r\n                                     ], arrowAttributes);\r\n\r\n     return [garrow, gtext];\r\n   }\r\n///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////\r\nexport function placeRuler(board, pt1, pt2, val)\r\n   {\r\n       const arrowAttributes = {\r\n         fixed:true,\r\n         highlight:false,\r\n         strokeWidth: () => Math.round(3*board.canvasWidth/800.),\r\n         strokeColor:'black',\r\n         fillOpacity:1.0\r\n       };\r\n       const gAttributes={\r\n         fixed:true,\r\n         highlight:false,\r\n         anchorX: 'middle',\r\n         anchorY:'middle',\r\n         color:'black',\r\n         CssStyle: 'font-weight: bold; fontFamily: Oswald;',\r\n         fontSize: () => Math.round(28*board.canvasWidth /800.)\r\n       };\r\n       let garrow=board.create('arrow', [[pt1[0], pt1[1]],[pt2[0], pt2[1]]], arrowAttributes);\r\n       let gtext =board.create('text',[0.5*(1.00*pt1[0]+1.00*pt2[0])+Math.abs(1.00*pt1[1]-1.00*pt2[1])*0.25, 0.5*(1.00*pt1[1]+1.00*pt2[1])+Math.abs(1.00*pt1[0]-1.00*pt2[0])*0.25, val], gAttributes);\r\n       return [garrow, gtext];\r\n    }\r\n///////////////////////////////////////////////////////////////////////////////\r\n///////////////////////////////////////Polygon////////////////////////////////////////\r\nexport function placeRec(board, pt1, pt2, pt3, pt4, cols){\r\n  const recAttributes = {\r\n    vertices:{visible:false, fixed:true},\r\n    borders:{visible:false},\r\n    fillColor:cols,\r\n    fillOpacity:1.0}\r\n  let m =board.create('polygon', [[pt1[0], pt1[1]],\r\n                                 [pt2[0], pt2[1]],\r\n                                 [pt3[0], pt3[1]],\r\n                                 [pt4[0], pt4[1]]], recAttributes);\r\n  return [m];\r\n}\r\n//////////////////////////////////////////////Circle/////////////////////////////////////\r\nexport function placeSlider(board, positionX, positionY, limit1, limit2, length, name)\r\n{\r\n  const sliderAttributes={\r\n    baseline:{strokeWidth:7*board.canvasHeight/800, strokeColor:'grey', highlight:false},\r\n    highline:{strokeWidth:7*board.canvasHeight/800, strokeColor:'black', highlight:false},\r\n    name:name,\r\n    highlight:false,\r\n    size:()=>8*board.canvasHeight/800,\r\n    face:'square',\r\n    fillColor:'grey',\r\n    strokeColor:'black',\r\n    withTicks:false,\r\n    label:{fontSize:()=> Math.round(18*board.canvasWidth/800.),\r\n    cssStyle:'fontFamily:Oswald;', highlight:false}\r\n  }\r\n   let m = board.create('slider',[[positionX, positionY],[positionX+length, positionY],[limit1, 0.5*(limit1+limit2), limit2]], sliderAttributes);    //\r\n   return m;\r\n}\r\nexport function placeSliderSwitch(board, positionX, positionY, limit1, limit2, length, name)\r\n{\r\n  const sliderAttributes={\r\n    baseline:{strokeWidth:7*board.canvasHeight/800,strokeColor:'grey'},\r\n    highline:{strokeWidth:7*board.canvasHeight/800,strokeColor:'black'},\r\n    name:name,\r\n    size:()=>8*board.canvasHeight/800,\r\n    highlight:false,\r\n    face:'square',\r\n    fillColor:'#FF0000',\r\n    strokeColor:'black',\r\n    snapWidth:1,\r\n    withTicks:false,\r\n    label:{anchorX:'left',fontSize:()=> Math.round(24*board.canvasWidth/800.),\r\n    cssStyle:'fontFamily:Oswald;'}\r\n  }\r\n   let m = board.create('slider',[[positionX, positionY],[positionX+length, positionY],[limit1, 0.5*(limit1+limit2), limit2]], sliderAttributes);    //\r\n   return m;\r\n}\r\n\r\nexport function placeImage(board, imValue, positionX, positionY, size, rotation){\r\n  const imageAttributes ={\r\n   opacity:1,\r\n   fixed:true,\r\n   rotate:rotation,\r\n  };\r\n   let im =board.create('image', [imValue, [positionX, positionY],[size,size]], imageAttributes);\r\n   return im;\r\n}\r\n\r\nexport function placeInput(board, positionX, positionY){\r\n  const inputAttributes ={\r\n    fixed: true,\r\n    cssStyle: 'fontFamily:Oswald; width:10%; background-color:#008CBA;border: 1px solid black;border-radius:3.5px;',\r\n    fontSize:function(){return Math.round(24*board.canvasWidth/800.)},\r\n    fixed:true,\r\n    parse:true\r\n  }\r\n   let inp =board.create('input', [positionX, positionY,'', ''], inputAttributes);\r\n   return [inp];\r\n}\r\nexport function hoverMe(board, element, message, Xoffset, Yoffset)\r\n{\r\n  element.setLabel(message);\r\n  element.label.setAttribute({visible:false,\r\n                              offset:[Xoffset, Yoffset],\r\n                              CssStyle:'fontFamily:Oswald;color:red',\r\n                              fontSize:function(){return Math.round(12*board.canvasWidth/800.)}});\r\n  element.on('over', function () {this.label.setAttribute({visible:true});});\r\n  element.on('out', function () {this.label.setAttribute({visible:false});});\r\n}\r\nexport function placeLabel(board, element, message, Xoffset, Yoffset)\r\n{\r\n  element.setLabel(message);\r\n  element.label.setAttribute({\r\n                              offset:[Xoffset, Yoffset],\r\n                              anchorX:'left',\r\n                              anchorY:'middle',\r\n                              CssStyle:'fontFamily:Oswald;',\r\n                              fontSize:function(){return Math.round(12*board.canvasWidth/800.)}});\r\n}\r\nexport function placeTitle(board, titleText, subTitleText, offset = [0, -1.0]) {\r\n    const commonTextAttributes = {\r\n        anchorX: 'middle',\r\n        display: 'internal',\r\n        highlight: false,\r\n        fixed: true\r\n    };\r\n    const titleTextAttributes = {\r\n        ...commonTextAttributes,\r\n        anchorY: 'middle',\r\n        CssStyle: 'font-weight: bold; fontFamily: Oswald;',\r\n        highlight:false,\r\n        fontSize: () => Math.round(32 * board.canvasWidth /800.)\r\n    };\r\n    const subTitleTextAttributes = {\r\n        ...commonTextAttributes,\r\n        anchorY: 'middle',\r\n        CssStyle: 'fontFamily: Oswald;',\r\n        highlight:false,\r\n        fontSize: () => Math.round(24 * board.canvasWidth /800.)\r\n    };\r\n    const boundingBox = board.attr.boundingbox;\r\n\r\n    let title = board.create(\r\n        'text',\r\n        [(boundingBox[0] + boundingBox[2]) / 2.0 + offset[0],\r\n         boundingBox[1] + offset[1],\r\n         titleText],\r\n        titleTextAttributes\r\n    );\r\n    let subtitle = board.create(\r\n        'text',\r\n        [(boundingBox[0] + boundingBox[2]) / 2.0 + offset[0],\r\n         boundingBox[1] + 2*offset[1],\r\n         subTitleText],\r\n        subTitleTextAttributes\r\n    );\r\n    return [title, subtitle];\r\n}\r\n\r\nexport function clearInputFields(board) {\r\n    let magicGraph = board.containerObj;\r\n    let inputFields = magicGraph.querySelectorAll(\"input\");\r\n    for (let inputField of inputFields) {\r\n        inputField.value = \"\";\r\n    }\r\n}\r\n\r\nexport function setInputFieldAnswerColor(inputObject, isAnswerCorrect) {\r\n  // TODO: Tableau colors don't look great with blue background, find a\r\n  // different color scheme that looks better.\r\n  let colorizeElement = function (element, condition) {\r\n    if (element) {\r\n      if (condition) {\r\n        // element.style.borderColor = '#59A14F';\r\n        element.style.backgroundColor = 'green';\r\n      } else {\r\n        // element.style.borderColor = '#E15759';\r\n        element.style.backgroundColor = 'red';\r\n      }\r\n    }\r\n  }\r\n\r\n  colorizeElement(inputObject.rendNodeInput, isAnswerCorrect);\r\n  colorizeElement(inputObject.rendNode, isAnswerCorrect);\r\n}\r\n\r\nexport function markInteractive(inputObject) {\r\n  let board = inputObject.board;\r\n  if (!board._xedliy) {\r\n    board._xedliy = {};\r\n  }\r\n\r\n  if (!board._xedliy.interactive) {\r\n    let magicGraph = board.containerObj;\r\n    let svgs = magicGraph.querySelectorAll(\"svg\");\r\n    for (let svg of svgs) {\r\n      svg.style.pointerEvents = \"none\";\r\n    }\r\n    board._xedliy.interactive = true;\r\n  }\r\n\r\n  if (inputObject) {\r\n    // console.log(inputObject);\r\n    inputObject.rendNode.style.cursor = \"pointer\";\r\n    inputObject.rendNode.style.pointerEvents = \"all\";\r\n  }\r\n}\r\n","var DateProto = Date.prototype;\nvar INVALID_DATE = 'Invalid Date';\nvar TO_STRING = 'toString';\nvar $toString = DateProto[TO_STRING];\nvar getTime = DateProto.getTime;\nif (new Date(NaN) + '' != INVALID_DATE) {\n  require('./_redefine')(DateProto, TO_STRING, function toString() {\n    var value = getTime.call(this);\n    // eslint-disable-next-line no-self-compare\n    return value === value ? $toString.call(this) : INVALID_DATE;\n  });\n}\n","'use strict';\n// ECMAScript 6 symbols shim\nvar global = require('./_global');\nvar has = require('./_has');\nvar DESCRIPTORS = require('./_descriptors');\nvar $export = require('./_export');\nvar redefine = require('./_redefine');\nvar META = require('./_meta').KEY;\nvar $fails = require('./_fails');\nvar shared = require('./_shared');\nvar setToStringTag = require('./_set-to-string-tag');\nvar uid = require('./_uid');\nvar wks = require('./_wks');\nvar wksExt = require('./_wks-ext');\nvar wksDefine = require('./_wks-define');\nvar enumKeys = require('./_enum-keys');\nvar isArray = require('./_is-array');\nvar anObject = require('./_an-object');\nvar isObject = require('./_is-object');\nvar toObject = require('./_to-object');\nvar toIObject = require('./_to-iobject');\nvar toPrimitive = require('./_to-primitive');\nvar createDesc = require('./_property-desc');\nvar _create = require('./_object-create');\nvar gOPNExt = require('./_object-gopn-ext');\nvar $GOPD = require('./_object-gopd');\nvar $GOPS = require('./_object-gops');\nvar $DP = require('./_object-dp');\nvar $keys = require('./_object-keys');\nvar gOPD = $GOPD.f;\nvar dP = $DP.f;\nvar gOPN = gOPNExt.f;\nvar $Symbol = global.Symbol;\nvar $JSON = global.JSON;\nvar _stringify = $JSON && $JSON.stringify;\nvar PROTOTYPE = 'prototype';\nvar HIDDEN = wks('_hidden');\nvar TO_PRIMITIVE = wks('toPrimitive');\nvar isEnum = {}.propertyIsEnumerable;\nvar SymbolRegistry = shared('symbol-registry');\nvar AllSymbols = shared('symbols');\nvar OPSymbols = shared('op-symbols');\nvar ObjectProto = Object[PROTOTYPE];\nvar USE_NATIVE = typeof $Symbol == 'function' && !!$GOPS.f;\nvar QObject = global.QObject;\n// Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173\nvar setter = !QObject || !QObject[PROTOTYPE] || !QObject[PROTOTYPE].findChild;\n\n// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687\nvar setSymbolDesc = DESCRIPTORS && $fails(function () {\n  return _create(dP({}, 'a', {\n    get: function () { return dP(this, 'a', { value: 7 }).a; }\n  })).a != 7;\n}) ? function (it, key, D) {\n  var protoDesc = gOPD(ObjectProto, key);\n  if (protoDesc) delete ObjectProto[key];\n  dP(it, key, D);\n  if (protoDesc && it !== ObjectProto) dP(ObjectProto, key, protoDesc);\n} : dP;\n\nvar wrap = function (tag) {\n  var sym = AllSymbols[tag] = _create($Symbol[PROTOTYPE]);\n  sym._k = tag;\n  return sym;\n};\n\nvar isSymbol = USE_NATIVE && typeof $Symbol.iterator == 'symbol' ? function (it) {\n  return typeof it == 'symbol';\n} : function (it) {\n  return it instanceof $Symbol;\n};\n\nvar $defineProperty = function defineProperty(it, key, D) {\n  if (it === ObjectProto) $defineProperty(OPSymbols, key, D);\n  anObject(it);\n  key = toPrimitive(key, true);\n  anObject(D);\n  if (has(AllSymbols, key)) {\n    if (!D.enumerable) {\n      if (!has(it, HIDDEN)) dP(it, HIDDEN, createDesc(1, {}));\n      it[HIDDEN][key] = true;\n    } else {\n      if (has(it, HIDDEN) && it[HIDDEN][key]) it[HIDDEN][key] = false;\n      D = _create(D, { enumerable: createDesc(0, false) });\n    } return setSymbolDesc(it, key, D);\n  } return dP(it, key, D);\n};\nvar $defineProperties = function defineProperties(it, P) {\n  anObject(it);\n  var keys = enumKeys(P = toIObject(P));\n  var i = 0;\n  var l = keys.length;\n  var key;\n  while (l > i) $defineProperty(it, key = keys[i++], P[key]);\n  return it;\n};\nvar $create = function create(it, P) {\n  return P === undefined ? _create(it) : $defineProperties(_create(it), P);\n};\nvar $propertyIsEnumerable = function propertyIsEnumerable(key) {\n  var E = isEnum.call(this, key = toPrimitive(key, true));\n  if (this === ObjectProto && has(AllSymbols, key) && !has(OPSymbols, key)) return false;\n  return E || !has(this, key) || !has(AllSymbols, key) || has(this, HIDDEN) && this[HIDDEN][key] ? E : true;\n};\nvar $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(it, key) {\n  it = toIObject(it);\n  key = toPrimitive(key, true);\n  if (it === ObjectProto && has(AllSymbols, key) && !has(OPSymbols, key)) return;\n  var D = gOPD(it, key);\n  if (D && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) D.enumerable = true;\n  return D;\n};\nvar $getOwnPropertyNames = function getOwnPropertyNames(it) {\n  var names = gOPN(toIObject(it));\n  var result = [];\n  var i = 0;\n  var key;\n  while (names.length > i) {\n    if (!has(AllSymbols, key = names[i++]) && key != HIDDEN && key != META) result.push(key);\n  } return result;\n};\nvar $getOwnPropertySymbols = function getOwnPropertySymbols(it) {\n  var IS_OP = it === ObjectProto;\n  var names = gOPN(IS_OP ? OPSymbols : toIObject(it));\n  var result = [];\n  var i = 0;\n  var key;\n  while (names.length > i) {\n    if (has(AllSymbols, key = names[i++]) && (IS_OP ? has(ObjectProto, key) : true)) result.push(AllSymbols[key]);\n  } return result;\n};\n\n// 19.4.1.1 Symbol([description])\nif (!USE_NATIVE) {\n  $Symbol = function Symbol() {\n    if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor!');\n    var tag = uid(arguments.length > 0 ? arguments[0] : undefined);\n    var $set = function (value) {\n      if (this === ObjectProto) $set.call(OPSymbols, value);\n      if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;\n      setSymbolDesc(this, tag, createDesc(1, value));\n    };\n    if (DESCRIPTORS && setter) setSymbolDesc(ObjectProto, tag, { configurable: true, set: $set });\n    return wrap(tag);\n  };\n  redefine($Symbol[PROTOTYPE], 'toString', function toString() {\n    return this._k;\n  });\n\n  $GOPD.f = $getOwnPropertyDescriptor;\n  $DP.f = $defineProperty;\n  require('./_object-gopn').f = gOPNExt.f = $getOwnPropertyNames;\n  require('./_object-pie').f = $propertyIsEnumerable;\n  $GOPS.f = $getOwnPropertySymbols;\n\n  if (DESCRIPTORS && !require('./_library')) {\n    redefine(ObjectProto, 'propertyIsEnumerable', $propertyIsEnumerable, true);\n  }\n\n  wksExt.f = function (name) {\n    return wrap(wks(name));\n  };\n}\n\n$export($export.G + $export.W + $export.F * !USE_NATIVE, { Symbol: $Symbol });\n\nfor (var es6Symbols = (\n  // 19.4.2.2, 19.4.2.3, 19.4.2.4, 19.4.2.6, 19.4.2.8, 19.4.2.9, 19.4.2.10, 19.4.2.11, 19.4.2.12, 19.4.2.13, 19.4.2.14\n  'hasInstance,isConcatSpreadable,iterator,match,replace,search,species,split,toPrimitive,toStringTag,unscopables'\n).split(','), j = 0; es6Symbols.length > j;)wks(es6Symbols[j++]);\n\nfor (var wellKnownSymbols = $keys(wks.store), k = 0; wellKnownSymbols.length > k;) wksDefine(wellKnownSymbols[k++]);\n\n$export($export.S + $export.F * !USE_NATIVE, 'Symbol', {\n  // 19.4.2.1 Symbol.for(key)\n  'for': function (key) {\n    return has(SymbolRegistry, key += '')\n      ? SymbolRegistry[key]\n      : SymbolRegistry[key] = $Symbol(key);\n  },\n  // 19.4.2.5 Symbol.keyFor(sym)\n  keyFor: function keyFor(sym) {\n    if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol!');\n    for (var key in SymbolRegistry) if (SymbolRegistry[key] === sym) return key;\n  },\n  useSetter: function () { setter = true; },\n  useSimple: function () { setter = false; }\n});\n\n$export($export.S + $export.F * !USE_NATIVE, 'Object', {\n  // 19.1.2.2 Object.create(O [, Properties])\n  create: $create,\n  // 19.1.2.4 Object.defineProperty(O, P, Attributes)\n  defineProperty: $defineProperty,\n  // 19.1.2.3 Object.defineProperties(O, Properties)\n  defineProperties: $defineProperties,\n  // 19.1.2.6 Object.getOwnPropertyDescriptor(O, P)\n  getOwnPropertyDescriptor: $getOwnPropertyDescriptor,\n  // 19.1.2.7 Object.getOwnPropertyNames(O)\n  getOwnPropertyNames: $getOwnPropertyNames,\n  // 19.1.2.8 Object.getOwnPropertySymbols(O)\n  getOwnPropertySymbols: $getOwnPropertySymbols\n});\n\n// Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives\n// https://bugs.chromium.org/p/v8/issues/detail?id=3443\nvar FAILS_ON_PRIMITIVES = $fails(function () { $GOPS.f(1); });\n\n$export($export.S + $export.F * FAILS_ON_PRIMITIVES, 'Object', {\n  getOwnPropertySymbols: function getOwnPropertySymbols(it) {\n    return $GOPS.f(toObject(it));\n  }\n});\n\n// 24.3.2 JSON.stringify(value [, replacer [, space]])\n$JSON && $export($export.S + $export.F * (!USE_NATIVE || $fails(function () {\n  var S = $Symbol();\n  // MS Edge converts symbol values to JSON as {}\n  // WebKit converts symbol values to JSON as null\n  // V8 throws on boxed symbols\n  return _stringify([S]) != '[null]' || _stringify({ a: S }) != '{}' || _stringify(Object(S)) != '{}';\n})), 'JSON', {\n  stringify: function stringify(it) {\n    var args = [it];\n    var i = 1;\n    var replacer, $replacer;\n    while (arguments.length > i) args.push(arguments[i++]);\n    $replacer = replacer = args[1];\n    if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined\n    if (!isArray(replacer)) replacer = function (key, value) {\n      if (typeof $replacer == 'function') value = $replacer.call(this, key, value);\n      if (!isSymbol(value)) return value;\n    };\n    args[1] = replacer;\n    return _stringify.apply($JSON, args);\n  }\n});\n\n// 19.4.3.4 Symbol.prototype[@@toPrimitive](hint)\n$Symbol[PROTOTYPE][TO_PRIMITIVE] || require('./_hide')($Symbol[PROTOTYPE], TO_PRIMITIVE, $Symbol[PROTOTYPE].valueOf);\n// 19.4.3.5 Symbol.prototype[@@toStringTag]\nsetToStringTag($Symbol, 'Symbol');\n// 20.2.1.9 Math[@@toStringTag]\nsetToStringTag(Math, 'Math', true);\n// 24.3.3 JSON[@@toStringTag]\nsetToStringTag(global.JSON, 'JSON', true);\n","require('./_wks-define')('asyncIterator');\n","// all enumerable object keys, includes symbols\nvar getKeys = require('./_object-keys');\nvar gOPS = require('./_object-gops');\nvar pIE = require('./_object-pie');\nmodule.exports = function (it) {\n  var result = getKeys(it);\n  var getSymbols = gOPS.f;\n  if (getSymbols) {\n    var symbols = getSymbols(it);\n    var isEnum = pIE.f;\n    var i = 0;\n    var key;\n    while (symbols.length > i) if (isEnum.call(it, key = symbols[i++])) result.push(key);\n  } return result;\n};\n"],"sourceRoot":""}