Tombarr

defmodule Greeting do     
  def hey(name) do
    name = name || "Tom"
    IO.puts "Hey, " <> name
  end
end

test_name = nil
Greeting.hey(test_name) # Hello, Tom
test_name # nil

Tombarr

const hey = (person) => {
  person.name = person.name || "Tom";
  console.log(`Hey, ${person.name}`);
};

let bob = {};
hey(bob); // "Hey, Tom"
bob // { name: "Tom" }

Tombarr

# is it assignment?
all_systems = :go

# not quite
:go = all_systems

# alas age is but a number
tom = %{name: "Tom", age: 25}
%{age: num} = tom # 25

Tombarr

Enum.join(Enum.reverse(String.split(String.upcase("war"), "")), "")

Tombarr

"war" |> String.upcase |> String.split("") |> Enum.reverse |> Enum.join("")

Tombarr

"war"
  |> String.upcase
  |> String.split("")
  |> Enum.reverse
  |> Enum.join("")

Tombarr

"war".toUpperCase().split("").reverse().join("");

Tombarr

public static TemporalAdjuster LAST_WORKING_DAY = TemporalAdjusters.ofDateAdjuster(lastDayOfMonth -> {
  int daysToSubtract = Math.max(0, lastDayOfMonth.getDayOfWeek().getValue() - DayOfWeek.FRIDAY.getValue());
  return lastDayOfMonth.minusDays(daysToSubtract);
});

// Example Usage
LocalDate.now().with(LAST_WORKING_DAY);

Tombarr

import java.util.stream.*;
import java.util.Arrays;

// O(n) solution to the Trapped Water Problem
// @see https://techdevguide.withgoogle.com/paths/advanced/volume-of-water/
public class TrappedWater {
    
    public static void main(String args[]) {
        int[] sampleTopography = { 1,3,2,4,1,3,1,4,5,2,2,1,4,2,2 };
        int trappedWaterVolume = getTrappedWater(sampleTopography);

Tombarr

import java.util.stream.IntStream;
import java.util.Arrays;

// O(n^2) solution to the Trapped Water Problem
// @see https://techdevguide.withgoogle.com/paths/advanced/volume-of-water/
public class TrappedWater {

    public static void main(String args[]) {
        int[] sampleTopography = { 1,3,2,4,1,3,1,4,5,2,2,1,4,2,2 };
        int trappedWaterVolume = getTrappedWater(sampleTopography);