loilo

Back up and restore an IndexedDB database

This gist is an ES module which provides functions to import and export data from an IndexedDB database as JSON. It's based on Justin Emery's indexeddb-export-import package, but applies some adjustments that reflect better on the current browser landscape (i.e. better developer ergonomics but no support for Internet Explorer).

Usage

For each of the provided functionalities, you need a connected IDBDatabase instance.

Export Data

import { idb } from 'some-database'

gregkorossy

function Semaphore(max) {
  var counter = 0;
  var waiting = [];
  
  var take = function() {
    if (waiting.length > 0 && counter < max){
      counter++;
      let promise = waiting.shift();
      promise.resolve();
    }

servel333

 Based on https://stackoverflow.com/a/31632215/761771

const reduceOp = function(args, reducer){
  args = Array.from(args);
  args.pop(); // => options
  var first = args.shift();
  return args.reduce(reducer, first);
};

snorfalorpagus

Using distutils and build_clib to build a C library

This repository demonstrates how to build a C library that is included in the module distribution.

To build the C library:

python setup.py build_clib

jung-kim

"use strict";

let looper = (callback) => {
  let n = 2000000;
  while (n > 0) {
    callback(n);
    n--;
  }
}

urin

@echo off
::
:: logrotate.bat - Log rotation for windows
::
:: Usage: logrotate.bat filename maxfilecount [maxfilesize]
::
::   filename    : The file name to rotate.
::   maxfilecount: Number of backup files.
::   maxfilesize : Rotated if the size of file exceeds specified size.
::                 (Default is 0. Unit notation is available (K, M and G))

ericremoreynolds

class KeyifyList(object):
    def __init__(self, inner, key):
        self.inner = inner
        self.key = key

    def __len__(self):
        return len(self.inner)

    def __getitem__(self, k):
        return self.key(self.inner[k])

robertripoll

This code has been moved to a GitHub repository with the corresponding license. https://github.com/UngarMax/TelnetServer

erikvip

Import & Export Cygwin List of installed Packages

If you want to go from 32 to 64 bit Cygwin but keep all the packages[1], you might find yourself in a spot where you would like to export the list of cygwin packages and also be able to install cygwin with all these packages again. I will tell you how. Open your Cygwin shell and enter

cygcheck -c -d | sed -e "1,2d" -e 's/ .*\$//' > packagelist

This will simply dump a list of installed packages. To install Cygwin 64 with these packages selected, download setup-x86_64[2] and execute it with the command line parameters

./setup-x86_64 -P `awk 'NR==1{printf \$1}{printf ",%s", \$1}' packagelist`