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Ivan Starkov istarkov

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View classBasedEnhancer.js
/* @flow */
import * as React from 'react'
import { compose, withProps } from 'recompose'
import type { HOC } from 'recompose'
// Example of very dirty written fetcher enhancer
function fetcher<Response: {}, Base: {}>(
dest: string,
nullRespType: ?Response
): HOC<{ ...$Exact<Base>, data?: Response }, Base> {
return BaseComponent =>
@istarkov
istarkov / 00 README.md
Last active Nov 26, 2017
How to style React components
View 00 README.md

How to style React components

If you use sass and css-modules and want to restyle some base component without changing its code. (base component already use css-modules and exposes styles property)

I know two way how to do it.

  1. Using composes css-modules operator. Just extend classes you need, then in javascript code combine both styles as {...baseStyle, ...myStyleSimple}
View question.md

I want to hold ordering of some items in SQL, like field in a table index: 0,1,2,3,4,... and I have operation moveItem

If I want to move item from index: 1 to index: 3 I can do

delete from table where index = 1;
update table set index = index - 1 where index > 1
update table set index = index + 1 where index >=3
insert into table (index) values (3)
View 01-howto-setup-nginx-with-http2-on-ubuntu-12-04.md

The problem: old ubuntu does not support chrome http2 as chrome uses APLN which is exists in openssl ^1.0.2h

create file /etc/apt/sources.list.d/nginx.list and add lines

deb http://nginx.org/packages/mainline/ubuntu/ trusty nginx
deb-src http://nginx.org/packages/mainline/ubuntu/ trusty nginx
@istarkov
istarkov / serialize.js
Last active Sep 10, 2019
Serialize promise calls (run promises sequentially)
View serialize.js
// promise
const sleep = (timeout, v) => new Promise(r => setTimeout(() => r(v), timeout));
// series to call
const series = [() => sleep(1000, 1), () => sleep(1000, 2), () => sleep(1000, 3)];
// serialize
const r = series
.reduce(
(m, p) => m.then(v => Promise.all([...v, p()])),
Promise.resolve([])