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Alois Bělaška abelaska

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@bpedro
bpedro / mkdir_p.js
Last active October 31, 2020 00:35
nodejs implementation of recursive directory creation (https://brunopedro.com/2010/12/15/recursive-directory-nodejs/)
var fs = require('fs');
/**
* Offers functionality similar to mkdir -p
*
* Asynchronous operation. No arguments other than a possible exception
* are given to the completion callback.
*/
function mkdir_p(path, mode, callback, position) {
mode = mode || 0777;
@hjst
hjst / gist:1326755
Last active November 21, 2018 05:22
Format a javascript Date object as a 12h am/pm time string.
function format_time(date_obj) {
// formats a javascript Date object into a 12h AM/PM time string
var hour = date_obj.getHours();
var minute = date_obj.getMinutes();
var amPM = (hour > 11) ? "pm" : "am";
if(hour > 12) {
hour -= 12;
} else if(hour == 0) {
hour = "12";
}
@adamloving
adamloving / temporary-email-address-domains
Last active July 24, 2024 20:49
A list of domains for disposable and temporary email addresses. Useful for filtering your email list to increase open rates (sending email to these domains likely will not be opened).
0-mail.com
0815.ru
0clickemail.com
0wnd.net
0wnd.org
10minutemail.com
20minutemail.com
2prong.com
30minutemail.com
3d-painting.com
@pwc3
pwc3 / Exchange Sync.applescript
Last active February 1, 2024 12:34
AppleScript to copy all of the events from an Exchange calendar to an iCloud calendar.
tell application "Calendar"
-- delete everything from the destination calendar
-- TODO: Change "Destination Calendar" to be the name of your destination calendar
repeat with anEvent in (get events of calendar "Destination Calendar")
delete anEvent
end repeat
-- copy all events from the source calendar to the destination
-- TODO: Change "Source Calendar" to be the name of your source calendar
-- TODO: Change "Destination Calendar" to be the name of your destination calendar
@chanks
chanks / gist:7585810
Last active July 19, 2024 10:16
Turning PostgreSQL into a queue serving 10,000 jobs per second

Turning PostgreSQL into a queue serving 10,000 jobs per second

RDBMS-based job queues have been criticized recently for being unable to handle heavy loads. And they deserve it, to some extent, because the queries used to safely lock a job have been pretty hairy. SELECT FOR UPDATE followed by an UPDATE works fine at first, but then you add more workers, and each is trying to SELECT FOR UPDATE the same row (and maybe throwing NOWAIT in there, then catching the errors and retrying), and things slow down.

On top of that, they have to actually update the row to mark it as locked, so the rest of your workers are sitting there waiting while one of them propagates its lock to disk (and the disks of however many servers you're replicating to). QueueClassic got some mileage out of the novel idea of randomly picking a row near the front of the queue to lock, but I can't still seem to get more than an an extra few hundred jobs per second out of it under heavy load.

So, many developers have started going straight t

@chris-rock
chris-rock / crypto-gcm.js
Last active February 21, 2023 10:31
Use GCM for authenticated encryption in nodejs
// Nodejs encryption with GCM
// Does not work with nodejs v0.10.31
// Part of https://github.com/chris-rock/node-crypto-examples
var crypto = require('crypto'),
algorithm = 'aes-256-gcm',
password = '3zTvzr3p67VC61jmV54rIYu1545x4TlY',
// do not use a global iv for production,
// generate a new one for each encryption
iv = '60iP0h6vJoEa'
@blork
blork / extensions.m
Last active May 20, 2021 14:25
Dealing with various extension data types
NSExtensionItem *item = self.extensionContext.inputItems.firstObject;
NSItemProvider *itemProvider = item.attachments.firstObject;
// Shared plain text is stored here. Content varies wildly based on app.
NSString *sharedPlainText = [item.attributedContentText string];
if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypePropertyList]) {
[itemProvider loadItemForTypeIdentifier:(NSString *)kUTTypePropertyList
options:nil
completionHandler:^(NSDictionary *item, NSError *error) {
@patio11
patio11 / annual-prepay.md
Last active February 23, 2024 11:16
Appointment Reminder Annual Pre-pay copy (2014)

Notes

This is the latest version of an email which I send periodically, offering customers the opportunity to pre-pay for SaaS in return for a discount. The benefits to the SaaS company are better cash flow and reduced churn rate. The benefits to the customer are, well, in the email. This genre of email has produced hundreds of thousands of dollars in pre-pays for some companies I work with, and it rarely requires any more work than this example.

I've put $79 is as a placeholder for the cost of the user's plan. We calculate that for each account, naturally, along with the billing contact's name.

Subject: Save $79 on Appointment Reminder (and get a tax write-off) Formatting: 100% plain text. Gmail automatically links up the central link. From: Patrick McKenzie (Appointment Reminder) patrick@appointmentreminder.org

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

@dancannon
dancannon / listen.go
Created March 21, 2015 00:04
New channel based iterator in GoRethink v1.0
cursor, err := r.Expr([]int{1,2,3}).Run(session)
if err != nil {
panic(err)
}
ch := make(chan int)
cursor.Listen(ch)
<- ch // 1
<- ch // 2
<- ch // 3