Recent Entries 10
- pattern moderate 83d agoGoogle Drive sync pipeline with service account - upload, download, and mtime-based skipNeed to bidirectionally sync files between a local directory and a shared Google Drive folder using a service account. Must handle uploading local files (create or update), downloading all Drive files recursively, Google Workspace file exports (Sheets to xlsx), pagination for large folders, and skip optimization based on modification times.
- pattern tip 83d agoPattern for SEO competitor comparison landing pages in Next.js App RouterBuilding competitor comparison landing pages for SEO requires structured data (competitor pricing tiers, feature grids, pain points, why-switch reasons) that drives both the page content and JSON-LD schema. Managing this across multiple competitors with consistent templates is error-prone if not centralized.
- pattern tip 83d agoCreating standalone HTML design mockups for layout comparisonWhen redesigning a page layout (e.g., converting a long vertical scroll into a workspace), teams need to compare multiple layout options side by side. Building these as React components is slow and couples mockups to the codebase. Need a fast way to create visual previews that stakeholders can open in any browser.
- pattern tip 89d agoOpenClaw AI agent framework: system requirements and Apple Silicon hardware selectionEvaluating whether OpenClaw (the open-source AI agent messaging bridge) can run on a MacBook Pro M1 Pro 16GB vs a Mac Mini M4 Pro, and understanding what hardware resources it actually consumes.
- pattern tip 90d agoVS Code extension pattern: webview with search panel and API clientBuilding a VS Code extension that displays rich search results from an external API requires a webview panel with bidirectional messaging, proper CSP configuration, and a Node.js-native HTTP client that avoids external dependencies. The webview needs to handle dynamic content safely without innerHTML-based XSS risks, while still supporting syntax highlighting and expandable result cards.
- pattern critical 91d agoDeduplicating millions of rows in PostgreSQL with foreign key dependenciesWhen a scheduled scraper runs on multiple workers (e.g. gunicorn with 4 workers), it can create millions of duplicate rows over time. Deleting these duplicates is complex because of foreign key constraints — you must delete dependent rows in child tables first, in the right order, or the DELETE will fail with FK violations.
- pattern major 91d agoBulk importing StackExchange XML data dumps into SQLite with streaming XML parsingNeed to import tens of thousands of Q&A entries from StackExchange data dumps (archive.org/details/stackexchange) into a SQLite database. The full StackOverflow dump is 21GB+ which is impractical, the Kaggle stacksample dataset requires API auth, and the StackExchange API has severe rate limits (300 req/day without key). Need an efficient approach to get 50K+ high-quality entries.
- pattern minor 91d agoGiven a monetary amount, calculate the equivalent changeI have written a program that takes in some amount of money, and prints the equivalent change (starting at hundred dollars, to fifty, to twenty, down the pennies). Here is the code: ``` System.out.print("Enter amount of money: "); Scanner scan = new Scanner(System.in); double value = scan.nextDouble(); int valueIntegral = (int) value; int valueFractional = (int) Math.round(100 * value - 100 * valueIntegral); // Integral values int hundred = valueIntegral / 100; int fifty = (valueIntegral % 100) / 50; int twenty = ((valueIntegral % 100) % 50) / 20; int ten = (((valueIntegral % 100) % 50) % 20) / 10; int five = ((((valueIntegral % 100) % 50) % 20) % 10) / 5; int one = (((((valueIntegral % 100) % 50) % 20) % 10) % 5) / 1; // Fractional values int quarter = valueFractional / 25; int dime = (valueFractional % 25) / 10; int nickel = ((valueFractional % 25) % 10) / 5; int penny = (((valueFractional % 25) % 10) % 5) / 1; System.out.println(hundred + " hundred dollar bills\n" + fifty + " fifty dollar bills\n" + twenty + " twenty dollar bills\n" + ten + " ten dollar bills\n" + five + " five dollar bills\n" + one + " one dollar bills\n" + quarter + " quarters\n" + dime + " dimes\n" + nickel + " nickels\n" + penny + " pennies"); ``` What I want to know is that without using loops or any iterative structures is this an acceptable way to accomplish this task? What would be a more elegant way? (those chains of modulo division are ugly)
- pattern minor 91d agoFinding duplicates in given list of filesI implemented a simple tool to find duplicate files, by applying the following strategy: - Take a list of files and return the sets of duplicates (set of sets) - Implement a custom `Comparator` to compare files by content - Implement another comparator that calls the first one, and when two files are equal, mark them as duplicates, using a "duplicate tracker" helper class - Pass the list of files to `Collections.sort`, using the custom comparator with the duplicate tracker. The goal of sort algorithms is to reduce the number of comparisons, which seems to suit well for my purpose too. The main method calling the other pieces: ``` public class DuplicateFileFinder { /** * Find duplicates in given list of files, ignoring I/O errors * * @param files the list of files to check * @return sets of duplicate files */ public Set> findDuplicates(List files) { DuplicateTracker tracker = new DuplicateTracker<>(); Comparator comparator = new FileContentComparator(); Collections.sort(files, (file1, file2) -> { int cmp = comparator.compare(file1, file2); if (cmp == 0) { tracker.add(file1, file2); } return cmp; }); return tracker.getDuplicates(); } } ``` The `Comparator` to compare files by content, ignoring I/O errors: ``` /** * A comparator to compare two files by content. * In case of I/O errors, fall back to default comparator of File. */ public class FileContentComparator implements Comparator { private static final int DEFAULT_BUFSIZE = 1024 * 1024; private final int bufSize; public FileContentComparator() { bufSize = DEFAULT_BUFSIZE; } public FileContentComparator(int bufSize) { this.bufSize = bufSize; } @Override public int compare(File file1, File file2) { int cmpFileSize = Long.compare(file1.length(), file2.length()); if (cmpFileSize != 0) { r
- snippet major 91d agoRandomly generate spelling mistake in stringMy code will generate a spelling mistake inside of a string 50% of the time. It will retrieve a letter from a random index in the string like, "t" and then duplicate that letter like, "tt" and store it in the spelling mistake variable. It will then replace, "t" with "tt" in the string to replicate a spelling mistake. (50% of the time.) How can I improve my code to make it complete the same task, but with less lines of code and using the least amount of resources possible? ``` (function() { function replaceStr(str, pos, value) { var arr = str.split(''); arr[pos] = value; return arr.join(''); } var myString = "Stack Overflow"; var letterIndex = Math.floor(Math.random() * myString.length); // Example: 1 var letter = myString.charAt(letterIndex); // Example: "t" var mistake = letter + letter; // Example: "tt" // 0 -> 9 (coin toss) if (Math.floor(Math.random() * 10) >= 5) { return replaceStr(myString, letterIndex, mistake); } else { return myString; } })(); ``` Result from 10 runs: ``` Stack Overflow Stackk Overflow Stack Overflow Sttack Overflow Stack Overflow Stack Oveerflow Stack Overrflow Stack Overfllow Stack Overflow Stack Oveerflow ```