codesnips
typescript 
import { Component, Inject } from '@angular/core';
import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';

export interface ConfirmDialogData {
  title: string;
  message: string;

Reusable Angular Confirmation Dialog Service Returning an Observable of the User's Choice

angular rxjs observables
by codesnips 3 tabs
python 
import threading


class MinuteRingBuffer:
    def __init__(self, window_minutes=15):
        if window_minutes < 1:

Rolling Per-Minute Log Aggregation with a Ring Buffer

logging metrics observability
by codesnips 3 tabs
rust 
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct CancelReason {
    pub reason: String,
    pub feedback: Option<String>,

Internally Tagged Enum JSON Serialization for a Rust Webhook API

rust serde json
by codesnips 3 tabs
rust 
use serde::Deserialize;

#[derive(Debug, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct Config {
    pub server: ServerConfig,

Parsing a Layered TOML Config into Typed Sections with Serde and Defaults

rust serde toml
by codesnips 3 tabs
ruby 
module KeysetPaginatable
  extend ActiveSupport::Concern

  class_methods do
    def keyset_page(cursor: nil, limit: 20, direction: :desc)
      limit = limit.to_i.clamp(1, 100)

Keyset Cursor Pagination for ActiveRecord Instead of OFFSET

ruby rails activerecord
by codesnips 4 tabs
java 
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeInfo.As;
import com.fasterxml.jackson.annotation.JsonTypeInfo.Id;

import java.math.BigDecimal;

Deserialize Polymorphic JSON into a Sealed Interface Hierarchy with Jackson

jackson json deserialization
by codesnips 3 tabs
go 
package feed

import (
	"encoding/base64"
	"encoding/json"
	"time"

Cursor-Based Keyset Pagination for a Postgres Feed API in Go

go postgres pagination
by codesnips 3 tabs
ruby 
class CreateWebhookEvents < ActiveRecord::Migration[7.1]
  def change
    create_table :webhook_events do |t|
      t.string :event_id, null: false
      t.string :source, null: false, default: "stripe"
      t.string :event_type, null: false

Idempotent Stripe Webhook Processing with a Unique Event Key in Rails

rails postgres webhooks
by codesnips 4 tabs
javascript 
import React from 'react';

export function UndoSnackbar({ pending, onUndo }) {
  if (!pending) return null;

  return (

Undoable Delete with a Snackbar and useReducer Timeout Controller in React

react hooks usereducer
by codesnips 3 tabs
ruby 
class SyncContactJob < ApplicationJob
  queue_as :external

  BACKOFF = ->(executions) do
    (2**executions) + rand(0.0..1.0) # exponential + jitter, in seconds
  end

Exponential Backoff with Jitter for Flaky External API Calls in ActiveJob

rails activejob background-jobs
by codesnips 3 tabs
python 
from django.core.cache import cache


class RateLimiter:
    def __init__(self, scope, limit, window_seconds):
        self.scope = scope

Rate-Limiting Django Password Reset Requests in a Form's clean() Method

django rate-limiting caching
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ruby 
class User < ApplicationRecord
  has_one_attached :avatar do |attachable|
    attachable.variant :thumb,
      resize_to_limit: [256, 256],
      convert: :webp,
      saver: { quality: 80 }

Attach and Resize an Avatar with an Active Storage Variant in Rails

rails active-storage image-processing
by codesnips 3 tabs