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/**
 * pipeAsyncFunctions.js
 * tags: { JavaScript, Adapter, Function, Promise }
 * Performs left-to-right function composition for asynchronous functions.
 * Use Array.prototype.reduce() with the spread operator (...) to perform
 * left-to-right function composition using Promise.then(). The functions can
 * return a combination of: simple values, Promise's, or they can be defined as
 * async ones returning through await. All functions must be unary.
 */

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/**
 * removeArrayElements.js
 * tags: { JavaScript, Array }
 * Removes elements from an array for which the given function returns false.
 * Use Array.prototype.filter() to find array elements that return truthy 
 * values and Array.prototype.reduce() to remove elements using 
 * Array.prototype.splice(). The func is invoked with three 
 * arguments (value, index, array).
 */

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/**
 * zipObject.js
 * tags: { JavaScript, Array, Object }
 * Given an array of valid property identifiers and an array of values,
 * return an object associating the properties to the values.
 * Since an object can have undefined values but not undefined property 
 * pointers, the array of properties is used to decide the structure of
 * the resulting object using Array.prototype.reduce().
 */

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/**
 * partitionArray.js
 * tags: { JavaScript, Array, Object, Function }
 * Groups the elements into two arrays, depending on the provided function's
 * truthiness for each element.
 * Use Array.prototype.reduce() to create an array of two arrays.
 * Use Array.prototype.push() to add elements for which fn returns true to the
 * first array and elements for which fn returns false to the second one.
 */

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Blogging with Gist

Gist simplicity can turn blogging into a liberating experience.

Pros	Cons
✅ Free, simple, fast, hassle-free	❌ Image upload in comments only
✅ Tagging	❌ No post pinning
✅ Search	❌ Doesn't look like a blog
✅ Revisions	❌ Unfriendly URLs

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echo-server-epoll
echo-server-poll
talk
talk.dSYM

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/**
 * getNumberOfDigits.js
 * tags: { JavaScript, Array, RxJS }
 */
 
const { interval } = Rx;
const { scan, pluck, groupBy } = RxOperators;

interval(1000).pipe(
  scan(

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/* Return tuple types, with a nullable error component just like Go */
/* meta: Typescript 3.9.5 */

type Err = Error | null;

async function getUser(): Promise<[string, Err]> {
  try {
    const res = await fetch('/me');
    const data = await res.json();
  

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#!/bin/bash
# Sometimes you need to move your existing git repository
# to a new remote repository (/new remote origin).
# Here are a simple and quick steps that does exactly this.
#
# Let's assume we call "old repo" the repository you wish
# to move, and "new repo" the one you wish to move to.
#
### Step 1. Make sure you have a local copy of all "old repo"
### branches and tags.

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@echo off
SET st3Path=C:\Program Files\Sublime Text 3\sublime_text.exe
 
rem add it for all file types
@reg add "HKEY_CLASSES_ROOT\*\shell\Open with Sublime Text 3"         /t REG_SZ /v "" /d "Open with Sublime Text 3"   /f
@reg add "HKEY_CLASSES_ROOT\*\shell\Open with Sublime Text 3"         /t REG_EXPAND_SZ /v "Icon" /d "%st3Path%,0" /f
@reg add "HKEY_CLASSES_ROOT\*\shell\Open with Sublime Text 3\command" /t REG_SZ /v "" /d "%st3Path% \"%%1\"" /f
 
rem add it for folders
@reg add "HKEY_CLASSES_ROOT\Folder\shell\Open with Sublime Text 3"         /t REG_SZ /v "" /d "Open with Sublime Text 3"   /f