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Vladimir Bloshchitsyn vologab

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@ljharb
ljharb / array_iteration_thoughts.md
Last active October 2, 2025 14:17
Array iteration methods summarized

Array Iteration

https://gist.github.com/ljharb/58faf1cfcb4e6808f74aae4ef7944cff

While attempting to explain JavaScript's reduce method on arrays, conceptually, I came up with the following - hopefully it's helpful; happy to tweak it if anyone has suggestions.

Intro

JavaScript Arrays have lots of built in methods on their prototype. Some of them mutate - ie, they change the underlying array in-place. Luckily, most of them do not - they instead return an entirely distinct array. Since arrays are conceptually a contiguous list of items, it helps code clarity and maintainability a lot to be able to operate on them in a "functional" way. (I'll also insist on referring to an array as a "list" - although in some languages, List is a native data type, in JS and this post, I'm referring to the concept. Everywhere I use the word "list" you can assume I'm talking about a JS Array) This means, to perform a single operation on the list as a whole ("atomically"), and to return a new list - thus making it mu

@ramonfritsch
ramonfritsch / expressjs-rewrite.js
Created November 9, 2016 17:06
URL rewrite on ExpressJS 4.0
....
//This is how you'd do on ExpressJS 3.0
app.get('/my/route1/', function (req, res, next) {
req.url = '/other/route2/';
next('route');
});
app.get('/other/route2/', function (req, res, next) {
res.send('I am other route 2');
@avafloww
avafloww / PhpJava.java
Last active August 12, 2025 13:33
This snippet of code is syntactically valid in both PHP and Java, and produces the same output in both.
/*<?php
//*/public class PhpJava { public static void main(String[] args) { System.out.printf("/*%s",
//\u000A\u002F\u002A
class PhpJava {
static function main() {
echo(//\u000A\u002A\u002F
"Hello World!");
}}
//\u000A\u002F\u002A
PhpJava::main();
@obenjiro
obenjiro / parsersissparta.md
Last active September 13, 2020 18:03
Parsers - is Sparta!
@udev
udev / genymotionwithplay.md
Last active September 25, 2021 02:33 — forked from wbroek/genymotionwithplay.txt
Genymotion with Google Play Services

#Download the following ZIPs: ARM Translation Installer v1.1 (http://www.mirrorcreator.com/files/0ZIO8PME/Genymotion-ARM-Translation_v1.1.zip_links)

#Download the correct GApps for your Android version: Google Apps for Android 6.0 (https://www.androidfilehost.com/?fid=24052804347835438 - benzo-gapps-M-20151011-signed-chroma-r3.zip) Google Apps for Android 5.1 (https://www.androidfilehost.com/?fid=96042739161891406 - gapps-L-4-21-15.zip) Google Apps for Android 5.0 (https://www.androidfilehost.com/?fid=95784891001614559 - gapps-lp-20141109-signed.zip) Google Apps for Android 4.4.4 (https://www.androidfilehost.com/?fid=23501681358544845 - gapps-kk-20140606-signed.zip) Google Apps for Android 4.3 (https://www.androidfilehost.com/?fid=23060877490000124 - gapps-jb-20130813-signed.zip) Google Apps for Android 4.2 (https://www.androidfilehost.com/?fid=23060877490000128 - gapps-jb-20130812-signed.zip)

@mikehwang
mikehwang / jq-profilejsonschema.md
Last active May 20, 2025 00:04
Use jq to profile the schema of a given JSON object or an array of JSONs objects

Profile JSON schema

Using jq is great for examining JSON objects. You can extend its functionality with custom methods. The following is useful to understand at a high level the structure of arbitrary JSONs which is useful when trying to understand new data sources.

Requires jq verison 1.5.

Profile an object

Add the following method to your ~/.jq:

@btroncone
btroncone / rxjs_operators_by_example.md
Last active September 14, 2025 16:48
RxJS 5 Operators By Example
@mkaz
mkaz / 10-scala-one-liners-to-impress-your-friends.md
Last active June 24, 2025 05:53

10 Scala One Liners to Impress Your Friends

Here are 10 one-liners which show the power of scala programming, impress your friends and woo women; ok, maybe not. However, these one liners are a good set of examples using functional programming and scala syntax you may not be familiar with. I feel there is no better way to learn than to see real examples.

Updated: June 17, 2011 - I'm amazed at the popularity of this post, glad everyone enjoyed it and to see it duplicated across so many languages. I've included some of the suggestions to shorten up some of my scala examples. Some I intentionally left longer as a way for explaining / understanding what the functions were doing, not necessarily to produce the shortest possible code; so I'll include both.

1. Multiple Each Item in a List by 2

The map function takes each element in the list and applies it to the corresponding function. In this example, we take each element and multiply it by 2. This will return a list of equivalent size, compare to o

@kevsmith
kevsmith / mdpreview.sh
Last active August 13, 2016 17:13
Markdown previewer using pandoc, chrome-cli, and fswatch
#!/bin/sh
# To install dependencies: brew install pandoc chrome-cli fswatch
# To use: mdpreview /path/to/content.md
monitored_file=`basename $1`
preview="/tmp/${monitored_file}.html"
preview_url="file://${preview}"
trap "rm -f ${preview};exit;" SIGINT SIGTERM
@remojansen
remojansen / class_decorator.ts
Last active July 30, 2025 05:53
TypeScript Decorators Examples
function logClass(target: any) {
// save a reference to the original constructor
var original = target;
// a utility function to generate instances of a class
function construct(constructor, args) {
var c : any = function () {
return constructor.apply(this, args);
}