wlytle / programming-univbasics-4-array-simple-array-manipulations-part-2-sea01-seng-ft-100520

Introduction To Simple Array Manipulations - Part 2

Learning Goals

• Identify the result of method calls on arrays
• Perform simple array manipulations

Introduction

Now that we've covered the methods .push, .unshift, .pop, and .shift, we can take a look at a few more specific methods. Just like the last lab, write your methods in lib/introduction_to_simple_array_manipulation.rb using the descriptions below. Run learn to see the initial test failures, then periodically to see your progress.

Consult the official documentation on Ruby Arrays for the methods you need to use to solve the problems in this lab.

Perform Simple Array Manipulations

using_concat

This method takes in two parameters of two different arrays and uses the .concat method to add the contents of the second array to the first.

using_insert

This method takes in two parameters, an Array and a new element to be added to the array. it uses the .insert method to add the new element to the 4th index of the array.

using_uniq

This method takes in a parameter of an Array and uses the .uniq method to remove any duplicate items.

using_flatten

This method takes in a parameter of an Array that contains other arrays and uses the .flatten method to return an array of strings.

using_delete

This method takes in two parameters, an Array and a String, and uses the .delete method to remove any items from the array that are equal to that string.

using_delete_at

This method takes in two parameters, an Array and an Integer and uses the .delete_at method to delete the element at the index of the array that is equal to the provided integer.

Conclusion

You have now used the most common methods built into Ruby arrays! Everh Array can use these methods, giving you the power to modify them in whatever way you need!

Resources

• Ruby Arrays