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What Building 77 Browser-Based Calculators Taught Me About Input Validation
Building one calculator is straightforward. Building dozens of calculators with different units, assumptions, ranges, and failure modes is where input handling becomes the real product.
- Validate data domain, not just type; enforce range constraints with requireRange utility
- Convert all units to base unit before computation, convert final result to display unit
iPhone 18 Pro Max vs. Samsung Galaxy S26 Ultra — Here's how Apple's and Samsung's flagships could compare
Which big-screen smartphone should you buy?
How can I thank react framework developers?
Hello! I am impressed with functionality offered by React framework. It is very good at structurizing large code bases using components. Concept of state and props is great.
Stuck on Casbin's model.conf? 5 mistakes beginners hit most
Stuck on Casbin's model.conf? The 5 mistakes beginners hit most (with a runnable fix) Casbin is one of the few permission frameworks that works across languages (Go / Java / Python / Node…), and its…
- Matcher field names must align with request or policy columns
- g() function checks subject equality, not just role inheritance
- Policy effect and matchers may not yield expected results together
How I Audit JavaScript Regexes for Catastrophic Backtracking
I maintain CodeSwap , a developer-tools site with browser-based utilities and technical guides. While reviewing its regular-expression tools, I wanted a repeatable answer to a deceptively simple…
- Systematic audit process identifies ambiguous repetition and measures performance growth.
- Node.js 22 test reveals exponential growth in matching time with increasing input length.
Every typing site makes you type prose. I built one that makes you type code.
I have been typing for twenty years and I still slow down on =>. Not on words. Words are fine. It is {}, [], &&, ::, ?., !== — the keys my fingers only ever meet inside code, and never inside the…
- Typre is a typing site exclusively for real code
- Features include no repeated snippets, separate run lengths, language-specific pools
- Offline functionality with bundled snippets and real-time syntax highlighting