Konstantin koss-lebedev

Web developer building things with React and TypeScript

koss-lebedev / profile_attribute_provider.rb

Created February 6, 2017 16:05

Code samples for Medium article

	class ProfileAttributeProvider

	def initialize(model)
	@model = model
	end

	def call
	ProfileField.all.map do \|field\|
	ActiveDynamic::AttributeDefinition.new(field.name, field.datatype)
	end

koss-lebedev / hasFlow.sh

Last active May 25, 2018 12:20

	FILES_WITHOUT_FLOW="$(grep -r --include=\*.js -L "@flow" src)"
	FILES_COUNT=$(echo $FILES_WITHOUT_FLOW \| wc -w)

	if [ $FILES_COUNT -ne 0 ]
	then
	echo "Following files are missing @flow annotation:"
	echo $FILES_WITHOUT_FLOW \| tr " " "\n"
	exit 1
	fi

koss-lebedev / flowValuesType.js

Last active May 24, 2018 15:25

	// @flow

	const SIZE = Object.freeze({
	LARGE: "large",
	MEDIUM: "medium",
	SMALL: "small"
	})

	type ISize = $Values<typeof SIZE>

koss-lebedev / valueTypeExample.js

Last active May 24, 2018 13:33

	// @flow

	const SIZE = Object.freeze({
	LARGE: "large",
	MEDIUM: "medium",
	SMALL: "small"
	})

	type ISize = $Values<typeof SIZE>

koss-lebedev / explitReturnBad.js

Last active May 24, 2018 12:29

	// @flow

	const isStringEmpty = (str?: string) => {
	return str && str.trim() !== ""
	}

	const first = isStringEmpty(null)
	const second = isStringEmpty("")
	const third = isStringEmpty("test")

koss-lebedev / explicitReturnGood.js

Created May 24, 2018 12:30

	// @flow

	const isStringEmpty = (str?: string): boolean => {
	return Boolean(str && str.trim() !== "")
	}

	const first = isStringEmpty(null)
	const second = isStringEmpty("")
	const third = isStringEmpty("test")

koss-lebedev / exactReadonlyType.js

Created May 24, 2018 13:52

	// @flow

	export type IProps = {\|
	+title: string,
	+description?: string,
	\|}

	class Post extends React.Component<IProps, {}> {

	componentDidMount() {

koss-lebedev / magicFreeze.js

Created May 25, 2018 12:05

	// @flow

	const SIZE = /::Object.freeze(/{
	LARGE: "large",
	MEDIUM: "medium",
	SMALL: "small"
	}
	}/::)/

	type ISize = $Values<typeof SIZE>

koss-lebedev / aoc_1.ex

Created July 4, 2018 12:19

	defmodule AdventOfCode.Day01 do
	def solve(part) when part == :one do
	nums = parse_input()
	init = delta(Enum.at(nums, 0), Enum.at(nums, -1))

	Enum.chunk_every(nums, 2, 1, :discard)
	\|> Enum.reduce(init, fn([a, b], acc) ->
	acc + delta(a, b)
	end)
	end

koss-lebedev / theme.ts

Last active September 17, 2018 12:14