EileenJuergens

// Boolean value
// The every() method tests whether ALL elements in the array pass the test implemented by the provided function.
Array.prototype.every()

// Boolean value
// The includes() method determines whether an array includes a certain value among its entries.
Array.prototype.includes()

// Boolean value
// The some() method tests whether at least one element in the array passes the test implemented by the provided function.

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# Skeleton
SELECT
FROM
WHERE
GROUP BY
ORDER BY
;


# use of SELECT - all values

EileenJuergens

/* 
    (1) Remove duplicate elements from the array 

    arr = [2,2,2,2,2,3,4,4,4,6]
    returns: [ 2, 3, 4, 6 ]
*/
const allDifferentOptions = arr.filter((item, index) => arr.indexOf(item) === index)
const allDifferentOptions = [...new Set(arr)] // alternative

EileenJuergens

Global configuration:

Username:
git config --global user.name "FIRST_NAME LAST_NAME"
Email address:
git config --global user.email "MY_NAME@example.com"


Repository-specific configuration:

EileenJuergens

import React from "react";
import { Context as ResponsiveContext } from "react-responsive";
import { mount } from "enzyme";
import KPICard from "./kpi-card.js";
import Icon from "./icon.js";
import IncomeSolid from "./icome-soild.svg";


const optionsMobile = {
	wrappingComponent: ResponsiveContext.Provider,

EileenJuergens

describe("<KPICard />", () => {
	beforeEach(() => {
		mountedComponentMobile = mountComponentMobile(mockedProps);
		mountedComponentWeb = mountComponentWeb(mockedProps);
	});

	it("should be defined", () => {
		expect(mountedComponentMobile).toBeDefined();
		expect(mountedComponentMobile.type()).toEqual(KPICard);
		expect(mountedComponentWeb).toBeDefined();

EileenJuergens

.kpi-card {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 8px; 
    @include bp-medium {
        flex-basis: 0;
        flex-grow: 1;
        max-width: 100%;
    }
}

EileenJuergens

import React from "react";
import MediaQuery from "react-responsive";
import Icon from "./icon.js";

function KPICard({ title, value, icon, iconColor }) {
	return (
		<div className="kpi-card">
			{/* Mobile view */}
			<MediaQuery maxWidth={576}>
				<div className="kpi-card__mobile__align kpi-card__style">

EileenJuergens

Installing Postgres via Brew

Pre-Reqs

Brew Package Manager

In your command-line run the following commands:

1. brew doctor
2. brew update

EileenJuergens

psql -U postgres // start postgres shell or command line interface.
Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
Most \d commands support additional param of __schema__.name__ and accept wildcards like *.*

\q: Quit/Exit
\l list all the databases
\c __database__: Connect to a database