test practice

Sample problems 2-27

This example presents five JavaScript practice problems in the browser console, with instructions displayed in the page. It demonstrates array iteration, filtering, sorting, and modular arithmetic on state objects with names, IDs, and population data. The code uses plain JavaScript array methods such as `forEach`, `includes`, and `sort`, along with `console.log` for output. No SVG or D3 visualization is involved; the exercises focus on fundamental data manipulation and logic skills using D3 v4 only as a script dependency.

Sample problems 2

This example presents four JavaScript practice problems embedded in an HTML page, intended for console-based learning rather than visual output. It demonstrates array searching, substring filtering, set difference, object sorting, and conditional logic using plain JavaScript. The problems work with hardcoded data arrays containing state names, locations, populations, and letter/number values. The code relies on the D3.js v4 library only for page setup, while all problem-solving uses native JavaScript methods like `console.log()`, `filter()`, `sort()`, and `forEach()`. No SVG or canvas rendering occurs, as the output appears solely in the browser’s developer console.

test1

This example demonstrates basic JavaScript array manipulation and object reduction, with output visible only in the browser console. The code uses standard array methods including `sort`, `map`, and `reduce` to square numbers, create transformed objects, compute a cumulative division, and convert an array of key-value pairs into a single object. No D3-specific APIs are called; the page merely includes D3 v7 via CDN and renders an empty body with large text styling. The visualization is limited to a blank screen, with all behavior occurring through console logging.

Sszhang99

JavaScript Basics Array

This example demonstrates fundamental JavaScript array operations through the D3 library. The code uses `d3.select` and `d3.range` to create an SVG container, though no explicit data is rendered visually. Instead, the example focuses on array manipulation methods including custom range generation, sorting with comparison functions, and console output of results. It reproduces a Sol LeWitt art piece concept while experimenting with array methods like `sort`, `filter`, `forEach`, and `reverse` on hardcoded numeric arrays. The rendering approach uses an SVG element sized 960×500 pixels, with all operations logged to the browser console.

Ccssergio

STUDY GUIDE

This example demonstrates common data-manipulation patterns in D3, showing how to calculate averages, search arrays, sort objects, and combine datasets using JavaScript loops and D3 methods like `d3.mean` and `d3.ascending`. It also includes commented code for loading CSV data, building tooltips with HTML tables, and preparing geographic path data for SVG rendering. The visualization is a study guide presented as code snippets in the browser console, using D3 v4 with SVG output, and relies on built-in array methods such as `forEach`, `includes`, and `sort`.

5 practice problems-Anna

This example presents five JavaScript practice problems embedded in an HTML page with D3 v4 loaded for utility functions. The problems manipulate arrays and objects: matching state names to two-letter IDs, finding intersecting array values, sorting state objects by population, retrieving the smallest population state, and filtering numbers not divisible by three using the modulus operator. The code uses `forEach` loops, `Array.includes`, `Array.sort`, and `d3.range` to generate a number sequence. No SVG is rendered; results appear in the browser developer console.

Sample problems

This example presents five JavaScript practice problems focused on array and object manipulation. The code, built with D3 v4, demonstrates iterating through arrays to match objects, finding common elements, sorting an array by population, selecting a single object, and using a modulus operator within a loop. Since the problems do not involve SVG manipulation, users must open the developer console to see the output of each solution. The data are static, embedded within the `index.html` file.

LLaurynKW

Sample problems: objects and arrays

This example presents five JavaScript practice problems focused on manipulating objects and arrays, with output intended for the browser developer console rather than SVG graphics. The code uses D3 v4’s `d3.range` to generate an array of integers from 1 to 10 for a modulus-based filtering exercise. Problems involve merging state IDs from one array into another, finding common elements between two arrays, sorting state objects by population, and identifying the smallest population value. The visualization is purely code-driven, with no visual rendering, and relies on standard array methods like `forEach`, `sort`, and `includes`.

Aalexhoke