rauschma

Cheat sheet: JavaScript Array methods

Deriving a new Array from an existing Array:

['■','●','▲'].slice(1, 3)          ⟼ ['●','▲']
['■','●','■'].filter(x => x==='■') ⟼ ['■','■']
    ['▲','●'].map(x => x+x)        ⟼ ['▲▲','●●']
    ['▲','●'].flatMap(x => [x,x])  ⟼ ['▲','▲','●','●']

Geoff-Ford

Eric Elliott's "Master the JavaScript Interview" Series

A collection of links to the "Master the JavaScript Interview" series of medium stories by Eric Elliott.

Not part of the series but a good grounding.

• The Two Pillars of JavaScript - Part 1
• The Two Pillars of JavaScript - Part 2
• 10 Interview Questions Every JavaScript Developer Should Know

Master the JavaScript Interview

hsurreal

with
    dau as (
        -- This part of the query can be pretty much anything.
        -- The only requirement is that it have three columns:
        --   dt, user_id, inc_amt
        -- Where dt is a date and user_id is some unique identifier for a user.
        -- Each dt-user_id pair should be unique in this table.
        -- inc_amt represents the amount of value that this user created on dt.
        -- The most common case is
        --   inc_amt = incremental revenue from the user on dt

brock

#!/bin/bash
# node-reinstall
# credit: http://stackoverflow.com/a/11178106/2083544

## program version
VERSION="0.0.13"

## path prefix
PREFIX="${PREFIX:-/usr/local}"

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

labnol

Learning Google Apps Script

Find the best resources for learning Google Apps Script, the glue that connects all GSuite services including Gmail, Google Drive, Calendar, Google Sheets, Forms, Maps, Analytics and more.

A good place to learn more about Google Apps Script is the official documentation available at developers.google.com. Here are other Apps Script resources that will help you get up to speed.

1. Google Apps Script Code Samples by Amit Agarwal
2. Google Apps Script Development - Create Google Apps Script projects locally inside VS Code - video tutorial
3. Awesome Google Scripts by Amit Agarwal
4. Google Developer Experts - Follow Apps Scr

natelandau

#  ---------------------------------------------------------------------------
#
#  Description:  This file holds all my BASH configurations and aliases
#
#  Sections:
#  1.   Environment Configuration
#  2.   Make Terminal Better (remapping defaults and adding functionality)
#  3.   File and Folder Management
#  4.   Searching
#  5.   Process Management

ndarville

Business Models

Advertising

Models	Examples
Display ads	Yahoo!
Search ads	Google

xnzac

# ref: http://37signals.com/svn/posts/3004-ab-testing-tech-note-determining-sample-size
#
# p1 = Variable A results. e.g. conversion rate from test A
# p2 = Variable B results
# power = chance of false negative (A power of 0.80 means that there is an 80% chance that if there was an effect, we would detect it )
# sig.level = chance of false positive (0.05 = 5%)

power.prop.test(p1=0.1, p2=0.11, power=0.8, alternative='two.sided', sig.level=0.05)

# Output will be a number signifying minimal sample size that meets the above criteria