The Expora Blog

In-depth guides on algorithm patterns, visual debugging, and coding interview prep — so you understand the why, not just the code.

Algorithm visualizer

May 16, 2026·6 min read

Best Algorithm Visualizer for Coding Interviews (2026): An Honest Comparison

There is a difference between understanding how an algorithm works in theory and being able to trace it under pressure. Visualization helps close that gap — but only if the tool matches the type of understanding you are trying to build.

Coding interview prep

May 15, 2026·6 min read

Binary Search Patterns: The 3 Templates That Solve Every Variation

Most binary search bugs come from template mismatch, not a misunderstanding of the algorithm. There are three distinct templates — exact match, left boundary, right boundary — each with its own loop condition, pointer update, and post-loop interpretation. Once you know which to reach for, every variation becomes mechanical.

LeetCode alternative

Apr 26, 2026·6 min read

Is LeetCode Dead With AI? What Actually Replaces It

AI killed memorization as a competitive advantage. It did not kill the need to understand algorithms. Here's what changed, what didn't, and what actually replaces grinding.

Coding interview prep

Apr 20, 2026·8 min read

Sliding Window & Two Pointers: Patterns, Templates, and Interview Problems

Sliding window and two pointers together cover a huge share of array and string problems in coding interviews. Here's how each pattern works, when to use each, and the decision framework for choosing between them.

LeetCode alternative

Apr 9, 2026·7 min read

Why LeetCode is So Hard — and Why Grinding More Problems Won't Help

You've solved 150 problems and still freeze in the interview. It's not you — it's what you've been practicing. Here's why grinding LeetCode doesn't build the understanding interviewers are testing.

Coding interview prep

Apr 8, 2026·11 min read

Dynamic Programming Explained Visually: Memoization, Tabulation, and the Patterns That Stick

Most DP explanations show you the finished code without showing how anyone arrived at it. This guide works differently — it shows you the dp array filling up, the thinking behind each recurrence, and the patterns that make DP systematic.

Coding interview prep

Apr 6, 2026·9 min read

Graph Algorithms for Coding Interviews: When to Use BFS, DFS, or Dijkstra

Candidates know how BFS and DFS work but freeze when a new graph problem appears because they don't know which algorithm to reach for. Here's the decision framework that fixes that.

Coding interview prep

Apr 2, 2026·10 min read

Coding Interview Patterns: The 7 That Cover 80% of Problems

The most common mistake in interview prep is grinding problems without recognizing patterns. These 7 patterns cover the structural foundation behind the vast majority of coding interview problems.

Algorithm visualizer

Mar 1, 2026·7 min read

How to Visualize Algorithms Step by Step (BFS, DFS, DP)

Seeing execution step by step—state, pointers, queues—makes algorithms click. Here’s how to use an interactive visualizer for BFS, DFS, Dijkstra, and more.

LeetCode alternative

Mar 1, 2026·8 min read

Best LeetCode Alternative 2026: Stop Grinding, Start Understanding

LeetCode checks output; it doesn’t show you the decision-making. Here’s what to look for in a LeetCode alternative that builds real algorithm understanding.

Coding interview prep

Mar 1, 2026·6 min read

Coding Interview Prep: From Memorizing to Understanding

Interview prep that focuses on understanding patterns—not just solving more problems. Roadmaps, mental maps, and visual execution that transfer to the interview.

Product

Feb 11, 2026·5 min read

Introducing Expora: Understand Algorithms, Not Just Solve Them

Today we are introducing Expora, an integrated platform for learning and practicing algorithms and data structures. Mental maps, visual roadmaps, and step-by-step animations so you can see the intuition behind every pattern.