andre-bahia

import 'package:flutter/services.dart';
import 'package:intl/intl.dart';

class CurrencyPtBrInputFormatter extends TextInputFormatter {

  TextEditingValue formatEditUpdate(TextEditingValue oldValue, TextEditingValue newValue) {
    if(newValue.selection.baseOffset == 0){
      return newValue;
    }

leopoldodonnell

Local Postgres

This gist is an example of how you can simply install and run and extended Postgres using docker-compose. It assumes that you have docker and docker-compose installed and running on your workstation.

Install

• Requires docker and docker-compose
• Clone via http: git clone https://gist.github.com/b0b7e06943bd389560184d948bdc2d5b.git
• Make load-extensions.sh executable
• Build the image: docker-compose build

jbrown123

DROP TABLE IF EXISTS users;
DROP VIEW IF EXISTS bp;

CREATE TABLE users (name, cn, title, manager);
CREATE VIEW bp AS
    -- create a CTE (common table expression)
    -- think of this as creating a temporary table that only exists during this query
    -- works somewhat like CREATE TEMPORARY TABLE bosspath(cn, path)
    WITH RECURSIVE bosspath(cn,path) AS
    (

pbostrom

Loading third-party npm modules in ClojureScript

This example shows how to load the re-resizable npm module which provides a resizable React component. Requires the lein-npm plugin.

1. Add the npm module to the :npm :dependencies section of project.clj:

 :npm {:package {:scripts {:build "webpack -p"}}
       :dependencies [[react "16.4.0"]
                      [react-dom "16.4.0"]
                      ["@cljs-oss/module-deps" "1.1.1"]

jamesnyika

React Navigation is a great component for building mobile applications. It is versatile and supports both dominant platforms beautifully. However, despite the 2 libraries that exist out there to support this component in the Clojure ecosystem, there is sadly very little documentation on what and how you can set up and use this component. I could not get them to work for me (my failing) so I decided to try and make it work without the existing libraries just to that I can understand what is going on. Below is a laying out of my experience. Let me know if you have corrections so that we mortals who are not that sharp can learn.

React Navigation requires an exact set of steps to make it successfully work

Step 1: Installation of React Navigation

Use yarn to add the library to the project

gokulkrishh

/* 
  ##Device = Desktops
  ##Screen = 1281px to higher resolution desktops
*/

@media (min-width: 1281px) {
  
  /* CSS */
  

dmckeone

(All of this code tested in Enterprise DB PostgreSQL 9.4 Beta 1 and Python 3.3)

As of Virtualenv 1.3 (https://pypi.python.org/pypi/virtualenv) (and excluding Python 3.4's venv) there is an activate_this.py file within a virtualenv package that allows activation of a virtual environment within an embedded version of Python (like PostgreSQL's PL/Python). A Python 2/3 compatible version looks like this:

exec(open('/Some/VirtualEnv/Directory/myvirtualenv/bin/activate_this.py').read(), 
     dict(__file__='/Some/VirtualEnv/Directory/myvirtualenv/bin/activate_this.py'))

Where /Some/VirtualEnv/Directory is a directory and myvirtualenv is the name of the virtual environment in use. On Windows replace bin with Scripts.

chitchcock

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real