solution for http://toys.usvsth3m.com/javascript-under-pressure/ - ugly code

Coding Adelante: Challenges

This example shows a progression of coding challenges for learning JavaScript, starting with basic functions and building up to object-oriented programming. The gist presents a series of exercises that ask the reader to implement functions like `hello`, `multiply`, `sum`, `isEven`, and `isDivisible`, each with sample inputs and expected outputs shown in commented code. The visible API is plain JavaScript, using console output via `console.log` and standard function declarations. The examples gradually introduce arrays, conditional logic, and higher-order patterns, with the source being a single Markdown file from a gist. The rendering approach is purely text-based, with code blocks and comments that illustrate function behavior without any graphical or external library dependencies.

HHerbCaudill

Sample problems: objects and arrays

This example presents five JavaScript practice problems embedded in an HTML page, focusing on array and object manipulation rather than visual output. The exercises involve merging state names with their two-letter IDs, finding common elements between arrays, sorting state objects by population, and using the modulus operator to filter numbers. Built with D3 v4, the code uses `d3.range` to generate a sequence of integers, though all results are meant to be viewed in the browser’s developer console, as no SVG or graphical rendering is included.

Sample problems: objects and arrays

Sample problems: objects and arrays

This example presents five JavaScript practice problems that manipulate arrays and objects, with output visible only in the developer console. The problems demonstrate tasks such as merging object properties between arrays, finding common items, sorting objects by a numeric property, and filtering numbers using the modulus operator. The code uses D3 v4’s `d3.range` to generate an array of integers, while array methods like `forEach` and `sort` handle the core logic. No SVG or visual rendering is involved, as the focus is purely on algorithmic thinking with plain data structures.

Sample problems: objects and arrays

This example presents five JavaScript practice problems focused on manipulating objects and arrays, with output intended for the browser’s developer console rather than SVG or other visual rendering. The code demonstrates basic data operations such as merging object properties by matching names, finding common elements between arrays using nested loops and the `includes` method, sorting an array of state objects by population, and using a loop with the modulus operator to filter numbers. It relies on vanilla JavaScript for most tasks and uses the D3 v4 library’s `d3.range` function to generate a sequence of integers from 1 to 10.

69% match

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

69% match

JS Arrays exercise

This example demonstrates the results of JavaScript array operations by logging computed values to the browser console. It uses D3’s `ascending` import and the native `reduce`, `sort`, and `range` methods to generate an array of 40 numbers, sum them, and sort an array of key-value objects by their keys. The page itself renders only a blank screen with oversized text styling, as all output appears in the console via `console.log`. The source code is defined in `index.js` and loaded through a minimal `index.html` shell.

Ppkdvalis

68% match