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Programmer1970
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Programmer1970

Formerly called 'Code to 35'. Add our main WeChat ID to access a wealth of shared resources (algorithms, interview prep, tech stacks: Java, Python, Go, big data). We mainly share serious development techniques, focusing on output-driven input. Occasionally we post life snippets and gossip. Our aim is to attract precise traffic and test advertising opportunities.

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Recent Articles

Latest from Programmer1970

100 recent articles max
Programmer1970
Programmer1970
Jun 11, 2025 · Backend Development

A Comprehensive Overview of Spring Framework’s Transaction Management

This article dissects Spring's transaction management system, detailing its layered architecture, core interfaces such as PlatformTransactionManager, TransactionDefinition and TransactionSynchronization, the lifecycle of transaction start, commit and rollback, programmatic and declarative usage, advanced features like distributed and nested transactions, common pitfalls, and optimization recommendations.

AOPBackendJTA
0 likes · 13 min read
A Comprehensive Overview of Spring Framework’s Transaction Management
Programmer1970
Programmer1970
Jun 8, 2025 · Operations

Top 10 Essential Linux Ops Questions Every Interviewer and Engineer Should Master

This guide walks through ten core Linux operations topics—precise system resource monitoring, deep process diagnostics, network and port‑conflict troubleshooting, permission models, link‑type comparison, boot sequence analysis, layered log auditing, automation with cron, advanced file search, and systematic performance‑tuning—providing concrete commands, examples, and step‑by‑step procedures for interview and on‑the‑job success.

Boot SequenceLog AuditingPerformance Tuning
0 likes · 11 min read
Top 10 Essential Linux Ops Questions Every Interviewer and Engineer Should Master
Programmer1970
Programmer1970
May 30, 2025 · Information Security

Deep Dive into RSA: How It Works and Why It’s Secure

This article explains RSA’s history, key generation steps, encryption and decryption processes, the mathematical foundations behind its security, practical considerations like key length and random number generation, and common application scenarios such as secure communications, digital signatures, and authentication.

JavaKey generationRSA
0 likes · 13 min read
Deep Dive into RSA: How It Works and Why It’s Secure
Programmer1970
Programmer1970
Apr 20, 2025 · Backend Development

Nginx Location Matching Rules and Proxy_pass Path Handling – Complete Guide

This article explains Nginx’s location directive modifiers, their matching priority, concrete request‑to‑location examples, how proxy_pass concatenates URLs with or without a trailing slash, rewrite usage, special cases like Unix sockets and 301 avoidance, and offers configuration‑level best‑practice tips with a full sample config.

0 likes · 8 min read
Nginx Location Matching Rules and Proxy_pass Path Handling – Complete Guide
Programmer1970
Programmer1970
Feb 24, 2025 · Databases

Deep Dive into MySQL Join Algorithms: Principles, Implementation, and Optimization

This article thoroughly examines MySQL join operations, detailing the fundamentals, inner workings, and performance characteristics of Nested‑Loop Join, Block Nested‑Loop Join, and Hash Join, while providing practical optimization techniques, parameter tuning, and decision‑making guidance for different data sizes and query patterns.

Block Nested Loop JoinHash JoinJoin Algorithms
0 likes · 11 min read
Deep Dive into MySQL Join Algorithms: Principles, Implementation, and Optimization
Programmer1970
Programmer1970
Feb 13, 2025 · Backend Development

Deep Dive into Java’s Exchanger: How It Works and When to Use It

This article explains Java's Exchanger class, detailing its synchronization mechanism, internal source‑code structure, practical usage examples, and how it compares with other concurrency utilities such as CyclicBarrier, Semaphore, and SynchronousQueue.

ExchangerJUCJava
0 likes · 10 min read
Deep Dive into Java’s Exchanger: How It Works and When to Use It
Programmer1970
Programmer1970
Jan 19, 2025 · Databases

MySQL Interview Scenario: Analyzing E‑Commerce User Repurchase Behavior

This article presents a MySQL interview case that examines e‑commerce repurchase behavior using orders and users tables, defines repeat purchasers, computes average repurchase intervals and amounts, identifies high‑value customers, and aggregates results by city through CTEs, window functions, and grouped statistics.

CTECity-Level MetricsE-commerce Analytics
0 likes · 8 min read
MySQL Interview Scenario: Analyzing E‑Commerce User Repurchase Behavior
Programmer1970
Programmer1970
Jan 14, 2025 · Databases

MySQL Interview Scenario: Advanced SQL Analytics with Joins, Subqueries, and Window Functions

This article presents an e‑commerce interview case that defines three tables (orders, order_items, products), loads sample data, and walks through a step‑by‑step SQL solution using CTEs, aggregation, window functions and HAVING to calculate each customer's total spend, most expensive order, and favorite product category, filtering and sorting the results.

AggregationCTEDatabase
0 likes · 9 min read
MySQL Interview Scenario: Advanced SQL Analytics with Joins, Subqueries, and Window Functions