Learning about more about Big O notation today and came across this post by ParanoidAgnostic and wanted to attempt to port the Java to Javascript & D3.
credit to this block for the color approach.
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June 5, 2020 16:08
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big O - O(N2)
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| license: mit |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| const width = window.innerWidth; | |
| const height = window.innerHeight; | |
| const tileX = 10; // total per row | |
| const tileY = 10; // total per column | |
| const tileSize = 50; | |
| const circleArray = []; | |
| const greens = d3.scaleOrdinal(d3.schemeGreens[3]); | |
| // const colorArray = [d3.schemeCategory10, d3.schemeAccent]; | |
| const colorScheme = greens; // multi colour is colorArray | |
| const getRandFill = () => { | |
| const ranIndex = Math.floor(Math.random() * 10); | |
| return colorScheme(ranIndex); | |
| } | |
| const svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| const drawTile = (x,y,z) => { | |
| svg.append("g") | |
| .attr("transform", "translate (" + x + "," + y + ")") | |
| .append("rect") | |
| .attr("fill", getRandFill()) | |
| .attr("stroke", "#DDD") | |
| .attr("stroke-width", 1) | |
| .attr("width", z) | |
| .attr("height", z) | |
| } | |
| const processRow = (y, z) => { | |
| for(x=0;x<tileX;x++) { | |
| const xPos = x * z; | |
| const yPos = y * z; | |
| drawTile(xPos,yPos,z); | |
| } | |
| } | |
| const processLayer = (z) => { | |
| for(y=0;y<tileY;y++) { | |
| processRow(y,z); | |
| } | |
| } | |
| processLayer(tileSize) | |
| </script> | |
| </body> |
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