jungchris

import { createSelector } from 'reselect'

const shopItemsSelector = state => state.shop.items
const taxPercentSelector = state => state.shop.taxPercent

const subtotalSelector = createSelector(
  shopItemsSelector,
  items => items.reduce((acc, item) => acc + item.value, 0)
)

chrishiestand

package main

import (
	"context"
	"fmt"
	"log"

	badger "github.com/dgraph-io/badger/v2"
	"github.com/dgraph-io/badger/v2/pb"
)

samgiles

// [B](f: (A) ⇒ [B]): [B]  ; Although the types in the arrays aren't strict (:
Array.prototype.flatMap = function(lambda) { 
    return Array.prototype.concat.apply([], this.map(lambda)); 
};

chrissimpkins

Use these rapid keyboard shortcuts to control the GitHub Atom text editor on macOS.

Key to the Keys

• ⌘ : Command key
• ⌃ : Control key
• ⌫ : Delete key
• ← : Left arrow key
• → : Right arrow key
• ↑ : Up arrow key

thealexcons

package main

import (
	"io/ioutil"
	"log"
	"strings"
	"net/http"
	"encoding/json"
	"fmt"
	"time"

teameh

this._panResponder = PanResponder.create({
  // ----------- NEGOTIATION:
  // A view can become the touch responder by implementing the correct negotiation methods.

    // Should child views be prevented from becoming responder on first touch?
    onStartShouldSetPanResponderCapture: (evt, gestureState) => () => {
      console.info('onStartShouldSetPanResponderCapture');
      return true;
    },

sergiotapia

import (
    "crypto/md5"
    "encoding/hex"
)

func GetMD5Hash(text string) string {
    hasher := md5.New()
    hasher.Write([]byte(text))
    return hex.EncodeToString(hasher.Sum(nil))
}

david-mark

'use strict' Considered Pointless and Harmful

What is strict mode?

According to the MDN reference, it is:

ECMAScript 5's strict mode is a way to opt in to a restricted variant of JavaScript [sic].

It goes on to say:

mjackson

/**
 * Converts an RGB color value to HSL. Conversion formula
 * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
 * Assumes r, g, and b are contained in the set [0, 255] and
 * returns h, s, and l in the set [0, 1].
 *
 * @param   Number  r       The red color value
 * @param   Number  g       The green color value
 * @param   Number  b       The blue color value
 * @return  Array           The HSL representation

joseluisq

Add Git Branch Name to Terminal Prompt (Linux/Mac)

Open ~/.bash_profile in your favorite editor and add the following content to the bottom.

# Git branch in prompt.

parse_git_branch() {