Luke Horvat lukehorvat
lukehorvat
/ express-curl-middleware.js
Created
August 27, 2015 12:45
Express middleware to log a JSON request as a cURL command. Inspired by Chrome's "Copy as cURL" feature.
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| // After body-parsing middleware... | |
| app.use(function(req, res, next) { | |
| console.log( | |
| "curl '%s://%s%s' -X %s -H 'Content-Type: %s' -d '%s'", | |
| req.protocol, | |
| req.get("host"), | |
| req.originalUrl, | |
| req.method, | |
| req.get("Content-Type"), | |
| JSON.stringify(req.body) |
lukehorvat
/ get-color-in-range.js
Last active
June 21, 2016 04:07
Get a color within a defined color range, based on a percentage number.
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| import { scaleLinear } from "d3-scale"; | |
| const getColor = scaleLinear().domain([0, 100]).range(["#ccc", "#419fcf"]); | |
| getColor(0); // 0% = #ccc | |
| getColor(80); // 80% = #5da8ce | |
| getColor(100); // 100% = #419fcf |
lukehorvat
/ ban-generators-and-async.json
Last active
July 31, 2018 15:41
ESLint rule to disallow generators and async/await. Since AST selectors are used, ESLint 3.18.0 (or higher) is required.
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| { | |
| "rules": { | |
| "no-restricted-syntax": [ | |
| "error", | |
| "[generator=true]", | |
| "[async=true]", | |
| "AwaitExpression" | |
| ] | |
| } | |
| } |
lukehorvat
/ gulpfile.js
Last active
March 3, 2023 18:17
A small example of a "Vinyl adapter" that replaces `gulp.src`. Demonstrates how to create a stream for a "fake" (in-memory only) file.
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| import gulp from 'gulp'; | |
| import Vinyl from 'vinyl'; | |
| import vinylAdapter from './vinyl-adapter'; | |
| gulp.task('build', () => { | |
| const file = new Vinyl({ | |
| path: 'hello.js', | |
| contents: Buffer.from(`console.log('👋');`) | |
| }); |
lukehorvat
/ mapped-type-conversion.ts
Last active
June 6, 2020 14:12
Convert one mapped type to another. (TypeScript)
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| type Input<Output> = { | |
| [K in keyof Output]: { foo: () => Output[K] }; | |
| }; | |
| function convert<Output>(input: Input<Output>): Output { | |
| const keys = Object.keys(input) as (keyof Input<Output>)[]; | |
| return keys.reduce( | |
| (output, key) => ({ ...output, [key]: input[key].foo() }), | |
| {} as Output |
lukehorvat
/ gulpfile.js
Created
March 3, 2023 20:43
An example of how to print out the names of files streamed by gulp. Sometimes useful for debugging purposes.
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| import gulp from 'gulp'; | |
| import { Transform } from 'node:stream'; | |
| gulp.task('build', () => { | |
| return gulp | |
| .src('src/**/*.js') | |
| .pipe( | |
| new Transform({ | |
| objectMode: true, | |
| transform(file, encoding, callback) { |
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