Sergey daredrum

daredrum / mongodb.txt

Last active January 23, 2020 07:55

MongoDb solutions

	1. MongoDb combine $facet results into a single result set
	db.getCollection('list').aggregate([
	{
	$facet: {
	"events":[{
	$match: {
	'type': 'Event'
	}
	}],
	"tasks": [{

daredrum / Javascript Interview Tasks

Last active November 17, 2019 12:45

Javascript Interview Tasks

	1. add(2,4)(5,3)(2)(3,1); // 20

	function add(...argA) {
	const getSum = (arg) => arg.reduce((s, n) => s += n, 0);
	let sum = getSum(argA);

	const f = (...argB) => {
	sum += getSum(argB);
	return f;
	}

daredrum / changelog.sh

Created September 6, 2018 07:02

Bash script for getting change log between two the last "development" tags

	#!/bin/sh

	firstTag=$(git tag --list --sort=-taggerdate 'development-*' \| head -1)
	secondTag=$(git tag --list --sort=-taggerdate 'development-*' \| head -2 \| awk '{split($0, tags, "\n")} END {print tags[1]}')
	echo "Changes between ${secondTag} and ${firstTag}\n"
	git log --pretty=format:'%h -%d %s (%cd) <%an>' ${secondTag}..${firstTag}

daredrum / binary_javascript.js

Last active April 14, 2017 11:20

Binary in Javascript

	#Value swap without a third variable (^ XOR)
	var a = 1, b = 2;
	a ^= b;
	b ^= a;
	a ^= b;
	// a = 2, b = 1

	#Condition for indexOf
	!~array.indexOf(value); // -1 -> 0

daredrum / git_methods.txt

Last active August 2, 2016 18:25

Git methods

	### Override local branch from remote
	git fetch origin feature_branch
	git reset --hard origin/feature_branch

	### Remove branch remotely and locally
	git push origin feature_branch
	git branch -D feature_branch

	### Edit old commits
	git rebase --i 'bbc643cd^'

daredrum / array.js

Created July 4, 2016 13:23

Array techniques

daredrum / rounding_techniques.js

Last active April 14, 2017 11:19

Rounding techniques