标签：#programming

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Link https://leetcode.com/problems/subsets/description/ Problem Given an integer array nums of unique elements, return all possible subsets (the power set). The solution set must not contain duplicate subsets. Return the solution in any order. Example Example 1: Input: nums = [1,2,3] Output: [[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]] Example 2: Input: nums = [0] Output: [[],[0]] Solution First, create a variable subsets, initialized to [[]], as the return value. Loop through nums, and for each element, create new subsets by appending that element to each existing subset. Then, append these new subsets to subsets. Sample code class Solution : def subsets ( self , nums : List [ int ]) -> List [ List [ int ]]: """ 0: [[]] 1: [[]]+[1] -> [[], [1]] 2: [[],[1]] + [2],[1,2] -> [[], [1], [2], [1, 2]] 3: [[], [1], [2], [1, 2]] + [3], [1, 3], [2, 3], [1,2,3] -> [[], [1], [1, 2], [3], [1, 3], [2, 3], [1, 2, 3]] """ subsets = [[]] for num in nums : new_subsets = [ subset + [ num ] for subset in subsets ] subsets += new_subsets return subsets

submitted by /u/Sankra [link] [留言]

When I first started building APIs with Express.js, every async controller looked the same. I would write a try block, perform some database operations, and then write a catch block that called next(error) . It worked, so I copied the same pattern into every controller. One controller became ten. Ten became fifty. Eventually, I realized that half of my controller code wasn't actually business logic, it was just repetitive error handling. That's when I discovered the Async Handler pattern. The Problem A typical Express controller often looks like this: export const getUser = async ( req , res , next ) => { try { const user = await User . findById ( req . params . id ); if ( ! user ) { throw new Error ( " User not found " ); } res . json ( user ); } catch ( error ) { next ( error ); } }; There's nothing wrong with this code. The problem is that every async controller ends up looking exactly the same. Every file contains: try, catch and next(error) over and over again. Besides being repetitive, it's also easy to forget. Miss one try-catch block, and Express won't automatically catch errors thrown inside async functions. What Is an Async Handler? An async handler is a small wrapper function that automatically catches errors from async controllers. Instead of every controller handling its own errors, the wrapper does it for you. A Simple Analogy Imagine an office where every employee has to stop working whenever someone rings the front door. Besides doing their own job, they also have to greet every visitor. This quickly becomes repetitive and inefficient. Instead, the company hires a receptionist to handle every visitor. Now the employees can focus on their actual work while the receptionist takes care of the door. An async handler works the same way. Controllers focus on handling requests, while the async handler catches errors and passes them to Express's error handler. Without an Async Handler export const createUser = async ( req , res , next ) => { try { const user

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Hello, I'm Maneshwar. I'm building git-lrc, a Micro AI code reviewer that runs on every commit. It is...

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When building multi-agent systems, rigid state graphs quickly fall apart in the face of dynamic user inputs. Imagine building a smart assistant: a user hands you a checklist of three household chores today, but tomorrow it might be a list of ten software debugging tasks. Because the number of tasks, their sequence, and their execution details are entirely runtime-dependent, you cannot hardcode this path at design time. Forcing dynamic lists of work into a static graph-based workflow can lead to fragile, over-engineered code. You need a workflow that adapts dynamically at runtime. The Google Agent Development Kit (ADK) provides a flexible programming model to define dynamic workflows . With the release of ADK 2.4.0 , triggering these workflows has become even more seamless: you can register a Workflow directly in an agent's tools list, allowing the coordinator agent to execute it automatically as a first-class tool. In this article, you learn how to configure and trigger a dynamic workflow directly from a coordinator agent. This guide uses a task list coordination example, but you can adjust this pattern to other dynamic orchestration needs. The architecture of a dynamic workflow Static workflows define the execution path at design time. Dynamic workflows, however, allow agents to invoke tools, spawn other nodes, and schedule sub-agents conditionally at runtime. The system consists of three main components: Root agent ( root_agent ) : Gathers the list of tasks from the user, requests final approval, and directly calls the tasks_workflow tool. The workflow ( tasks_workflow ) : A Workflow that iterates over the approved tasks. Sub-agent ( task_explainer ) : An Agent tasked with generating a step-by-step execution plan for each task. Here is the architectural diagram of the solution: Technical implementation Let's break down how to implement this solution using the Google ADK library in Python. The complete code resides in the devrel-demos repository with core logic in

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submitted by /u/aldacron [link] [留言]

I spent three days wondering why my MCP server would just... stop. No crash logs. No error messages. Clients connected fine, then after a few hours, every tool call returned silence. Turns out the Model Context Protocol (MCP) spec doesn't force you to handle errors — it assumes you will. But the reference implementations are minimal. Your server starts healthy, then bit by bit, things go wrong. A network blip. A malformed tool argument. An external API timeout. And suddenly your AI agent is staring at a blank response. Here's the pattern I ended up with. It's not clever. It just works. The Fix Start with a wrapper around your tool handlers. Every MCP server framework has some kind of tool registration — this works for the official Python SDK, the TypeScript SDK, and most community frameworks: from mcp.server import Server from mcp.types import ErrorData , INTERNAL_ERROR , INVALID_PARAMS import traceback import json class ResilientMCPServer ( Server ): """ An MCP server that doesn ' t silently die. """ async def call_tool ( self , name : str , arguments : dict ): try : result = await super (). call_tool ( name , arguments ) return result except ( ConnectionError , TimeoutError ) as e : # Network-level issues — reconnect and retry self . _reconnect () return self . _error_response ( f " Connection lost while executing { name } : { e } " ) except ValueError as e : # Bad arguments from the client — tell them clearly return self . _error_response ( f " Invalid arguments for { name } : { e } " , code = INVALID_PARAMS ) except Exception as e : # Everything else — log, don't crash traceback . print_exc () return self . _error_response ( f " Tool { name } failed: { e } " , code = INTERNAL_ERROR ) def _error_response ( self , message : str , code : int = INTERNAL_ERROR ): return { " content " : [{ " type " : " text " , " text " : f " ERROR: { message } " }], " isError " : True } def _reconnect ( self ): """ Reset transport layer without restarting the server. """ # Your recon

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There’s not much information yet unfortunately. The PAT-related accounts do not seem to be limited to Korean ones, so be aware. submitted by /u/MirdovKron [link] [留言]

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StarDeck lets you search, tag, filter, and sort your starred GitHub repos from a Chrome side panel. Everything stays locally in your browser. submitted by /u/Whole-Steak1255 [link] [留言]