Hello friends!

I hope you had a great week. I personally had a cold this week, but it was a good way to kind of reset myself after a couple days of it. Let's get reading.
 

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Web links of the week

Finally understand Redux by building your own Store
Getting started with PWA using Vue
Font-display
Calendar with CSS Grid
 

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Something that interested me this week

I saw a cool video about how rubber bands are made this week. It was a cool video, but it started to make me think about more than just rubber bands. Everything we have ever touched was made by someone. I'm typing this while under a blanket that was designed by someone, I'm typing into an app that was built by someone, I have a show playing in the background that was made by hundreds of different people. I know it's probably silly to think about things like that, but it definitely helps put ideas (especially product-oriented ones) into perspective.
 

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Interview question of the week

Last time, I had you sort a stack of integers from least to greatest using another stack.
Here's a solution to the problem:

public static Stack<Integer> sortstack(Stack<Integer> input) {
  Stack<Integer> tmpStack = new Stack<Integer>();
  while(!input.isEmpty()) {
    int tmp = input.pop();
    while(!tmpStack.isEmpty() && tmpStack.peek() > tmp) {
      input.push(tmpStack.pop());
    }
    tmpStack.push(tmp);
  }
  return tmpStack;
}

Here's this week's question!
Write a function that prints a Christmas (or just pine) tree with N rows.

Example:

> printTree(3)
​  *
  -
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