franciscojunior

val <T> LiveData<T>.blockingValue: T?
    get() {
        var value: T? = null
        val latch = CountDownLatch(1)
        observeForever {
            value = it
            latch.countDown()
        }
        if (latch.await(2, TimeUnit.SECONDS)) return value
        else throw Exception("LiveData value was not set within 2 seconds")

franciscojunior

How to install virtualenv:

Install pip first

sudo apt-get install python3-pip

Then install virtualenv using pip3

sudo pip3 install virtualenv 

franciscojunior

# This script was originally written during for a summer course that I
# gave at FGV in January 2011. The script was used to show the
# students how to retrive data from Banco Central do Brasil
# (http://bcb.gov.br/?SERIETEMP) using SOAP protocol and R.

library(SSOAP)
library(XML)
library(RCurl)

wsdl <- getURL("https://www3.bcb.gov.br/sgspub/JSP/sgsgeral/FachadaWSSGS.wsdl", 

franciscojunior

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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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.

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