FindUtils (@findutils)

YAML to TOML to .env: Five Values That Changed Without a Single Error

Converting a config file feels like a formatting job. You change the syntax, check that the keys are all there, and ship it. Most of the time nothing breaks, which is exactly why the time it does brea

3d ago · 10 min readfindutils.hashnode.dev

Why Your Countdown Falls Behind in a Background Tab: setInterval, Chrome's Timer Throttling and a Timer That Keeps Time

Almost every countdown on the web starts like this: let remaining = 25 * 60; setInterval(() => { remaining--; render(remaining); }, 1000); It looks right on screen. Then someone starts a 25-minut

4d ago · 11 min readfindutils.hashnode.dev

Reversing a String Is a Unicode Test: Indexing, Iteration and Palindromes in JavaScript, Python, PHP and Go

A reader replied to my post on cutting text to a limit with a point worth its own article: the trouble starts before any cut, at array access and iteration. They linked a post on the palindrome proble

5d ago · 10 min readfindutils.hashnode.dev

Cutting Text to a Limit Without Breaking It: Code Units, Bytes and Tokens in JavaScript and Python

Most apps cut text somewhere. A preview gets 160 characters, a push notification has a byte limit, a database column has a size, and a prompt for a language model has a token budget. The FindUtils pos

6d ago · 11 min readfindutils.hashnode.dev

Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript

The FindUtils Prime Checker guide makes two choices I wanted to test in code. The tool uses plain trial division because it "never guesses", and it refuses any input above 9,007,199,254,740,991 instea

Oct 23 · 9 min readfindutils.hashnode.dev

FindUtils

About

Available for

FindUtils's blogs

YAML to TOML to .env: Five Values That Changed Without a Single Error

Why Your Countdown Falls Behind in a Background Tab: setInterval, Chrome's Timer Throttling and a Timer That Keeps Time

Reversing a String Is a Unicode Test: Indexing, Iteration and Palindromes in JavaScript, Python, PHP and Go

Cutting Text to a Limit Without Breaking It: Code Units, Bytes and Tokens in JavaScript and Python

Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript

FindUtils

About

Available for

FindUtils's blogs

YAML to TOML to .env: Five Values That Changed Without a Single Error

Why Your Countdown Falls Behind in a Background Tab: setInterval, Chrome's Timer Throttling and a Timer That Keeps Time

Reversing a String Is a Unicode Test: Indexing, Iteration and Palindromes in JavaScript, Python, PHP and Go

Cutting Text to a Limit Without Breaking It: Code Units, Bytes and Tokens in JavaScript and Python

Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript

FindUtils

About

Available for

FindUtils's blogs

YAML to TOML to .env: Five Values That Changed Without a Single Error

Why Your Countdown Falls Behind in a Background Tab: setInterval, Chrome's Timer Throttling and a Timer That Keeps Time

Reversing a String Is a Unicode Test: Indexing, Iteration and Palindromes in JavaScript, Python, PHP and Go

Cutting Text to a Limit Without Breaking It: Code Units, Bytes and Tokens in JavaScript and Python

Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript

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FindUtils

About

Available for

FindUtils's blogs

YAML to TOML to .env: Five Values That Changed Without a Single Error

Why Your Countdown Falls Behind in a Background Tab: setInterval, Chrome's Timer Throttling and a Timer That Keeps Time

Reversing a String Is a Unicode Test: Indexing, Iteration and Palindromes in JavaScript, Python, PHP and Go

Cutting Text to a Limit Without Breaking It: Code Units, Bytes and Tokens in JavaScript and Python

Is It Prime? Trial Division, Miller-Rabin and the 2^53 Wall in JavaScript