2b:null 2c:["$","title",null,{"children":"Testing and Practice | Incredible vis | Observable"}] 31:T914,{ // enter - update - exit pattern in old way // below creates svg element and returns the selection of svg element const one = d3.create("svg").attr("height", 100).attr("width", 300) console.log(one) // below binds the data and puts the data in the enter bin but doesnot render it and creates empty space in selection(rendering) bin. const two = one.selectAll("circle").data([1,2,3,4,5], d => d) console.log(two) // below creates new circle elements for everything that is in enter bin and puts them in rendering bin. const three = two.enter().append("circle").attr("r", 5).attr("cx", (d, i) => i*50 + 10).attr("cy", 10).attr("fill", "black"); console.log(three) // below pushes the unmatched data elements to exit bin, the changes that are made in enter bin are as follows the new data is pushed to the enter bin where the place for matched data (old and new data) indexes are left empty and other index are of new data example in this case -> [empty(3 will come), empty(5 will come), 7,8] now changes made in rendering bin are as follows: the unmatched data is pushed to exit bin and puts empty space in the unmatched indexes the rendering bin's length is same as old data. const four = one.selectAll("circle").data([3,5,7,8], d=>d) console.log(four) // below code removes the elements from the exit bin if you don't do this the unmatched circles stay this means they have already been rendered and stays eventhough they are not part of the rendering bin. four.exit().remove() // below code puts the circles in their index position. // four.attr("r", 5).attr("cx", (d, i) => i*50 + 10).attr("cy", 10).attr("fill", "black") // as we saw in the step-3 (three variable) the below code creates new rect elements for the new data and puts them in rendering bin. const five = four.enter().append("rect").attr("x", (d, i) => i*50 + 10).attr("y", 10).attr("height", 20).attr("width", 20).attr("fill", "blue") console.log(5, five) // instead of this line : four.attr("r", 5).attr("cx", (d, i) => i*50 + 10).attr("cy", 10).attr("fill", "black") we can use merge try commenting the below line once and/or the mentioned line. const x = five.merge(four).attr("cx", (d, i) => { console.log(d); return i*50 + 10}).attr("cy", 10).attr("fill", "black") console.log(x) return one.node() }32:T4d4,{ // This is .join() method new way of doing it. // firstlets create some svg visualization. const one = d3.create("svg").attr("height", 100).attr("width", 300) const two = one.selectAll("circle").data([1,2,3,4,5], d => d).join("circle").attr("r", 5).attr("cx", (d, i) => i*50 + 10).attr("cy", 10).attr("fill", "black") const three = one.selectAll("circle").data([3,5,7,8], d=> d) // const four = three.join("rect").attr("x", (d, i) => i*50 + 10).attr("y", 10).attr("height", 20).attr("width", 20).attr("fill", "black").attr("cx", (d, i) => i*50 + 10).attr("cy", 10).attr("fill", "black") // console.log(three) // Above commented or below code both works const five = three.join( (enter) => { enter .append("rect") .transition().duration(2500) .attr("x", (d, i) => i * 50 + 10) .attr("y", 10) .attr("height", 20) .attr("width", 20) .attr("fill", "black"); }, (update) => { update .transition().duration(2500) .attr("r", 5) .attr("cx", (d, i) => i * 50 + 10) .attr("cy", 10) .attr("fill", "black"); }, (exit) => { exit.remove(); } ); console.log(five) return one.node() }33:[] 2f:{"id":"9ac06c598bf06415","slug":null,"title":"Testing and Practice","thumbnail":"c78d2b7020f0da27df1e13c7f86c96dd3720daa59388e66dbdb11f5eaa5df61f","access_level":"public","create_time":"$D2023-12-27T12:21:59.358Z","update_time":"$D2023-12-27T12:22:13.901Z","view_time":null,"first_public_time":"$D2023-12-27T12:21:59.358Z","has_unpublished_edits":null,"fork":true,"stars":0,"starred":false,"owner":{"type":"team","id":"ce191a16d3a3c1a1","login":"incredible-vis","name":"Incredible vis","avatar_url":"https://avatars-next.observableusercontent.com/d332850ddd10aa75069eeafffc79d79d80bc755bce4cfdbe3b447ea00fac3409","tier":"starter_2024"},"version":174,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"cab7f8ad58f1b89a","login":"bhanusunku","name":"Bhanu Kedhar","avatar_url":"https://avatars-next.observableusercontent.com/17f0f648b747daa910891775bd30306e68fc08b0a4bb76f574e3cd6fdafbfc7e","tier":null}],"members":[{"type":"individual","id":"cab7f8ad58f1b89a","login":"bhanusunku","name":"Bhanu Kedhar","avatar_url":"https://avatars-next.observableusercontent.com/17f0f648b747daa910891775bd30306e68fc08b0a4bb76f574e3cd6fdafbfc7e","tier":null,"role":"editor"},{"type":"team","id":"ce191a16d3a3c1a1","login":"incredible-vis","name":"Incredible vis","avatar_url":"https://avatars-next.observableusercontent.com/d332850ddd10aa75069eeafffc79d79d80bc755bce4cfdbe3b447ea00fac3409","tier":"starter_2024","role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Testing and Practice","cells":[{"id":0,"value":"# Testing and Practice","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":5,"value":"

This is cool. What about\nthis?

","pinned":true,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":8,"value":"a = [1,2,3]; ","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":11,"value":"a[99] = 100;","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":13,"value":"a","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"{\n const dataset = [10, 20, 30, 40, 50];\n const newData = [50,60]\n // const \n const svg = d3.create(\"svg\").attr(\"height\", 300).attr(\"width\", 300);\n\n const circles = svg.selectAll(\"circle\")\n .data(dataset, d => d)\n .join(\"circle\");\n const cit = circles.attr(\"r\", 3.5)\n .attr(\"cx\", (d, i) => i*50 + 10)\n .attr(\"cy\", (d, i) => i* 50 + 10);\n\n const cc = cit.selectAll(\"circle\").data(newData, d => d).join(\"circle\")\n\n \n return svg.node()\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":61,"value":"$31","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":102,"value":"$32","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":131,"value":"{\n const d = d3.create(\"svg\").attr(\"height\", 100).attr(\"width\", 300)\n d.selectAll(\"circle\").data([1,2,3,4,5], d=>d).join(\"circle\").attr(\"r\", (d,i) => d).attr(\"cx\", (d, i) => i * 50 + 10).attr(\"cy\",10)\n\n d.selectAll(\"circle\").data([6,5,4,3,2,1], d=>d).join(\"circle\").transition().duration(2500).attr(\"r\", (d,i) => d).attr(\"cx\", (d, i) => i * 50 + 10).attr(\"cy\",10)\n\n return d.node()\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":165,"value":"

\n This is yellow (Descendant)\n \n This is yellow (Descendant)\n \n This is not affected (Child)\n

\n\n","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 30:"$2f:body"