ivan-kleshnin

let R = require("ramda")
let {Observable, Subject} = require("rx")

let scanFn = function (state, updateFn) {
  if (typeof updateFn != "function" || updateFn.length != 1) {
    throw Error("updateFn must be a function with arity 1, got " + updateFn)
  } else {
    return updateFn(state)
  }
}

ivan-kleshnin

Free port after manual kill

$ lsof -i :$PORT -- set desired port, e.g. 3000
$ kill $PID -- set discovered PID, e.g. 2227

ivan-kleshnin

let assert = require("assert");

function curryN(N, fn) {
  let self = undefined;
  let collectFn = Object.defineProperties(function (...args) {
    if (this) {
      self = this;
    }
    if (args.length >= N) {
      return fn.apply(self, args);

ivan-kleshnin

import Fs from "fs";
import Parse5 from "parse5";
import MemWatch from "memwatch-next";
import humanFormat from "human-format";

process.on("unhandledRejection", function (reason, p) {
  throw reason;
});

let timeScale = new humanFormat.Scale({

ivan-kleshnin

import Fs from "fs";
import {Parser} from "htmlparser2";
import MemWatch from "memwatch-next";
import humanFormat from "human-format";

process.on("unhandledRejection", function (reason, p) {
  throw reason;
});

let timeScale = new humanFormat.Scale({

ivan-kleshnin

/* 
  This wrapper
    1. Reduces boilerplate. Lwip functions like .resize() are very low-level. See the code to get what I mean.
    2. Adds sharpen to downsampling.
    3. Has promise-based API
    4. Operates on file buffers instead of image buffers to make operations immutable.
    
  Use Lwip directly if you experience bottleneck and need to batch operations for performance.
  Use this wrapper (it's forks) in other cases.
*/

ivan-kleshnin

import Path from "path";

const splitPathRe =
    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;

function assertPath(path) {
  if (typeof path !== 'string') {
    throw new TypeError('Path must be a string. Received ' +
                        util.inspect(path));
  }

ivan-kleshnin

function npm_package_is_installed {
  if [ $(npm list --depth 0 --parseable true "${2}" | grep "${1}$") ]; then
    echo "1"
  else
    echo "0"
  fi
}

# npm_package_is_installed gulp 
# npm_package_is_installed gulp -g

ivan-kleshnin

// resolution is [width, height] structure

// Evaluate resolution by width (height doesn't matter, just keep it proportional)
function evalResolutionByWidth(requiredWidth, actualResolution) {
  var actualWidth = actualResolution[0];
  var actualHeight = actualResolution[1];
  if (actualWidth > requiredWidth) {
    var scale = actualWidth / requiredWidth;
    return [requiredWidth, Math.round(actualHeight / scale)];
  } else {

ivan-kleshnin

# put this file in home folder
date_format %d/%b/%Y 
log_format %h %^[%d:%^] "%r" %s %b "%R" "%u"