// https://d3js.org/d3-collection/ Version 1.0.4. Copyright 2017 Mike Bostock. !function(n,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t(n.d3=n.d3||{})}(this,function(n){"use strict";function t(){}function e(n,e){var r=new t;if(n instanceof t)n.each(function(n,t){r.set(t,n)});else if(Array.isArray(n)){var i,u=-1,o=n.length;if(null==e)for(;++u=a.length)return null!=s&&t.sort(s),null!=f?f(t):t;for(var o,c,h,l=-1,v=t.length,p=a[r++],y=e(),d=i();++la.length)return n;var r,i=h[e-1];return null!=f&&e>=a.length?r=n.entries():(r=[],n.each(function(n,i){r.push({key:i,values:t(n,e)})})),null!=i?r.sort(function(n,t){return i(n.key,t.key)}):r}var s,f,c,a=[],h=[];return c={object:function(t){return n(t,0,r,i)},map:function(t){return n(t,0,u,o)},entries:function(e){return t(n(e,0,u,o),0)},key:function(n){return a.push(n),c},sortKeys:function(n){return h[a.length-1]=n,c},sortValues:function(n){return s=n,c},rollup:function(n){return f=n,c}}},n.set=f,n.map=e,n.keys=function(n){var t=[];for(var e in n)t.push(e);return t},n.values=function(n){var t=[];for(var e in n)t.push(n[e]);return t},n.entries=function(n){var t=[];for(var e in n)t.push({key:e,value:n[e]});return t},Object.defineProperty(n,"__esModule",{value:!0})});