Problem Set: String Array Manipulation

This section contains a number of selected problems for the String Array Manipulation section.

It is recommended that you review the problems, and complete a few before moving on to the next section.

Problem #1: A Bit Pushy

Push and pop can be used to modify arrays, so that they store the values you want.

In the snippet below, printArray is used to print out each value in an array. Run the code, and notice the format of the output to the console.

Use push and pop to modify input, so that the call to printArray will output the following:

I like to program in MakeCode Arcade

Run
/**
 * Prints all the words in the given array, separated by spaces, to the console
 * @param words an array of words to print
 */
function printArray(words: string[]) {
    let output: string = "";
    for (let i = 0; i < words.length; i++) {
        output += words[i] + " ";
    }
    console.log(output);
}
let input: string[] = ["I", "like", "to", "cook", "dinner"];

// Add your code here

printArray(input);

Extra spaces are trimmed when printing to the console in Arcade, so you don’t have to worry about the extra spacing that comes at the end from printArray.

Problem #2: While You Don’t Say That

You have somehow grown a distaste for the word “that”.

Write a small game that will continue to ask the user for a string until the user has inputted the word “that”. When that happens, splash “I don’t like that!” and end the game.

Problem #3: Pretty Printing

Fill in printArray below as described in the function comment. Make sure that the output for the three tests match the expected output listed in the comment on each line.

Run
/**
 * Prints all the words in the given array, separated by the given separator, to the console
 * @param words an array of words to print
 * @param seperator the separator placed in between the different elements of the array
 */
function printArray(words: string[], separator: string) {
    // Add your code here
}

// Tests!
printArray(["Simple", "Test"], " ");        // Should output `Simple Test`
printArray(["Hi", "I", "am", "me"], "!");   // Should output `Hi!I!am!me`
printArray(["Test", "Code", "Here"], "<>"); // Should output `Test<>Code<>Here`

You may want to review problem #1 before attempting this problem, as the function in it has a similar behavior.

Problem #4: Chatty Bot

Create a simple “Chatbot”, that will ask the player for a string with the prompt being a random string from an Array you make. Be sure to fill up the Array with a number of prompts, to make the bot interesting!

During the conversation, maintain a “log” in the console, and identify whether the bot or user entered that. For example, this might look like the following transcript:

bot: what is your favorite color?
user: red
bot: how are you?
user: good
bot: what is your favorite color?

There is no ending condition for the loop in this task - it is meant to go on forever. In this case, you can use a while loop, with the condition that it continues on just set to true.

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