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var fs = require('fs');
if (fs.existsSync(path)) {
    // Do something
}

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const asyncCompose = (…functions) => input => functions.reduceRight((chain, func) => chain.then(func), Promise.resolve(input));

const asyncPipe = (…functions) => input => functions.reduce((chain, func) => chain.then(func), Promise.resolve(input));

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 <?php
return [
    'log' => [
        'traceLevel' => 0, // не выводит stack trace
        'targets' => [
            [
                'class' => 'yii\log\FileTarget',
                'levels' => ['trace','error'],
                'categories' => ['dd'],
                'logFile' => '@app/runtime/logs/debug.log',

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import React, { Component } from "react";
import { render } from "react-dom";

class Parent extends Component {
  state = {
    key: true,
    count: 0
  };

  handleChildUnmount = () => {

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sudo apt-get install --reinstall gnome-applets

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# define port running container  
docker inspect d50dfd0130f3 | grep  "IPAddress"
# define port all apps:
docker inspect -f '{{.Name}} - {{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aq)

#memory usage
docker stats --all --no-stream --format "table {{.Container}}\t{{.Name}}\t{{.MemUsage}}"

#stop all container
docker stop $(docker ps -q)

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 aria2c -j 16 -x 16 <URL TO FILE>

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// dynamic add cordova.js
if (window.location.protocol === 'file:' || window.location.port === '3000') {
  var cordovaScript = document.createElement('script')
  cordovaScript.setAttribute('type', 'text/javascript')
  cordovaScript.setAttribute('src', 'cordova.js')
  document.body.appendChild(cordovaScript)
}

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sudo apt-get install gradle
export ANDROID_HOME=/<installation location>/android-sdk-linux
export PATH=${PATH}:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools

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var today = new Date().toISOString().slice(0, 10);