Gozala

WTF Flow

[Flow][] static type checker is a wonderful attempt to bring [algebric data types][] to JS. It is still fairly new project and there for has few WTFs that can pull you down the rabbit hole. This document is attempt to document things that may seem like a WTF from the perspective of JS developer who tries to employ static type checker, or in other words, some items on the list may be very subjective & based on the background of the writer.

Polymorphic type that is a function

It is very likely that one will wind up using [Polymorphic functions][] to solve a more general problem. And if you define type alias for such a function you may be puzzled what is the right syntax should be used for such type definition.

Let's start with:

jinxidoru

import * as http from 'http'
import * as _ from 'lodash'


//! In the standard implementation of http server, calling close is not guaranteed to close the
//! server.  Any idle connections being kept alive by clients will stay open until their timeout
//! is reached.  This is problematic for gracefully shutting down a process with an http server.
//! This function will create an http server that tracks the open connections.  On close, idle
//! connections are closed and any newly idled connection is immediately closed as well.  When there
//! are no more connections on the server, the 'empty' event is raised.

crmne

"""Download Dash User Docsets and install them in Zeal"""
import configparser
import json
import tarfile
import urllib.request
from pathlib import Path
from sys import platform

import easygui

beaugunderson

from streams session

• end-of-stream - specify a callback to be called when a stream ends (which is surpsingly hard to get right)
• duplexify - compose a Duplex stream from a Readable and a Writable stream
• pump - pipe streams together and close all of them if one of them closes
• pumpify - combine an array of streams into a single duplex stream using pump and duplexify
• through2 - tools for making Transform streams
• from2 - tools for making Readable streams

from "participatory modules" session

ohanhi

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Editorial note

ryanflorence

When a beginner asks you "when do I use semi-colons?" would you rather say this?

// what people who say "use semicolons!!" say
class Foo {
  prop = {
  }; // yes

juliandunn

INCIDENT DATE - INCIDENT TYPE

Meeting

Waiving meetings

In some cases the IC might determine that a PM meeting for the incident isn't needed. If the IC decides to waive the meeting please replace the Meeting section with a note indicating the meeting has been waived (example: Meeting waived: Paul Mooring)

robertjpayne

#import <Foundation/Foundation.h>
#import "RCTBridgeModule.h"

#define RCT_EXTERN_MODULE(objc_name, objc_supername) \
  RCT_EXTERN_REMAP_MODULE(objc_name, objc_name, objc_supername)

#define RCT_EXTERN_REMAP_MODULE(js_name, objc_name, objc_supername) \
  objc_name : objc_supername \
  @end \
  @interface objc_name (RCTExternModule) <RCTBridgeModule> \

fowlmouth

# here is an implementation of curry, arguments passed are wrapped up in a new 
# closure and a function is returned that accepts the remaining arguments
# usage:
#   proc foo (a,b: int): int = a + b
#   let f = curry(foo, 10)
#   assert f(10) == 20
#
# note: to use an overloaded function you must annotate its type
#   curry((proc(c:char,len:int):string)strutils.repeat, 'x') 
#

ryanflorence

.
├── actions
├── stores
├── views
│   ├── Anonymous
│   │   ├── __tests__
│   │   ├── views
│   │   │   ├── Home
│   │   │   │   ├── __tests__
│   │   │   │   └── Handler.js