lukehorvat
/ mapped-type-conversion.ts
Last active Jun 6, 2020
Convert one mapped type to another. (TypeScript)
View mapped-type-conversion.ts
| 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
Last active Nov 15, 2019
A small example of a "Vinyl adapter" that replaces `gulp.src`. Demonstrates how to create a stream for a "fake" (in-memory only) file.
View gulpfile.js
| 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
/ ban-generators-and-async.json
Last active Jul 31, 2018
ESLint rule to disallow generators and async/await. Since AST selectors are used, ESLint 3.18.0 (or higher) is required.
View ban-generators-and-async.json
| { | |
| "rules": { | |
| "no-restricted-syntax": [ | |
| "error", | |
| "[generator=true]", | |
| "[async=true]", | |
| "AwaitExpression" | |
| ] | |
| } | |
| } |
lukehorvat
/ get-color-in-range.js
Last active Jun 21, 2016
Get a color within a defined color range, based on a percentage number.
View get-color-in-range.js
| 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
/ express-curl-middleware.js
Created Aug 27, 2015
Express middleware to log a JSON request as a cURL command. Inspired by Chrome's "Copy as cURL" feature.
View express-curl-middleware.js
| // 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
/ es6-map-to-object-literal.js
Last active Dec 29, 2020
Convert ES6 Map to Object Literal
View es6-map-to-object-literal.js
| let map = new Map(); | |
| map.set("a", 1); | |
| map.set("b", 2); | |
| map.set("c", 3); | |
| let obj = Array.from(map).reduce((obj, [key, value]) => ( | |
| Object.assign(obj, { [key]: value }) // Be careful! Maps can have non-String keys; object literals can't. | |
| ), {}); | |
| console.log(obj); // => { a: 1, b: 2, c: 3 } |
lukehorvat
/ interceptors.coffee
Last active Dec 23, 2015
An example of how to use request/response interceptors in AngularJS 1.2 for consistent API interactions. This code does two things: 1) Automatic injection of the user auth token in all API requests. 2) Automatic event firing when the user receives an API response indicating a 401 (unauthorised) request.
View interceptors.coffee
| .config ($httpProvider) -> | |
| $httpProvider.interceptors.push ($q, $rootScope, apiUrl, authToken) -> | |
| request: (config) -> | |
| # Intercept API requests and inject the auth token. | |
| config.headers["X-Auth-Token"] = authToken if config.url.indexOf(apiUrl) is 0 and authToken? | |
| config or $q.when config | |
| responseError: (response) -> | |
| # Intercept unauthorised API responses and fire an event. |
lukehorvat
/ routes.html.erb
Created Sep 1, 2013
List all of the routes in your Ruby on Rails application in a nicely-formatted HTML table. Well-suited to those times when you're building an API and need an "auto-updating" reference page of application endpoints that you can share with others.
View routes.html.erb
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Routes</title> | |
| <link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet"> | |
| </head> | |
| <body> |
lukehorvat
/ excel-grid-plugin.js
Last active Mar 8, 2019
An Ext JS 4 grid plugin that provides Microsoft Excel-esque cell navigation and editing via keyboard. (License: MIT License)
View excel-grid-plugin.js
| var newGridCellValue = '', | |
| deleteGridCellValue = false; | |
| Ext.define('ExcelCellEditing', { | |
| extend: 'Ext.grid.plugin.CellEditing', | |
| alias: 'plugin.excelcellediting', | |
| initEditTriggers: function () { | |
| var me = this; |
lukehorvat
/ sibelius_fixer.bat
Created Jan 15, 2013
Batch file for fixing WAVs exported from Sibelius. Uses SoX to process files.
View sibelius_fixer.bat
| cd %~dp0 | |
| mkdir converted | |
| FOR %%A IN (%*) DO ( | |
| sox %%A "converted/%%~nxA" reverse trim 4.3 reverse trim 0.3 gain -n -1 | |
| lame -V7 converted/%%~nxA | |
| ) | |
| pause |
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