softarn

import java.util.Optional;

public class OptionalOrElse {

   public static void main(String[] args) {
       // Correct usage of orElseGet. createInventoryForUser is not invoked unless.
       System.out.println("Using the APIs in a correct way");
       findInventoryByUserId(1).orElseGet(() -> createInventoryForUser(1));
       findInventoryByUserId(2).orElseGet(() -> createInventoryForUser(2));

softarn

public T orElse(T other)
public T orElseGet(Supplier<? extends T> other)

softarn

import RPi.GPIO as GPIO
import urllib2
import simplejson
import time
import sys

GPIO.setmode(GPIO.BCM)
print "Setup Pin 10 to output"
GPIO.setup(10, GPIO.OUT)

softarn

for i in [1,2,3]:
  print i
else:
  print 4

#Will print 1 2 3 4
#But if you break the loop...

for i in [1,2,3]:
  print i

softarn

def self.recursive_symbolize_keys! hash
  hash.symbolize_keys!
  inner = hash.values.select{|v| v.is_a? Hash}.each{|h| recursive_symbolize_keys!(h)} 
  inner.each {|inner| hash.merge(inner)}
  hash
end