Url shortener
This is a problem set. Some of these are easy, others are far more difficult. The purpose of these problems sets are:
- to build your skill applying computational thinking to a problem
- to assess your knowledge and skills of different programming practices
What is this problem set trying to do[edit]
This is example problem set. In this example we are applying our knowledge of Hashing, lists, conditionals, and processing user input
The Problem[edit]
I found this problem on Daily Coding Problem[2], and I love it.
Implement a URL shortener:
shorten(url), which shortens the url into a six-character alphanumeric string, such as zLg6wl. restore(short), which expands the shortened string into the original url. If no such shortened string exists, return null.
Hacker edition[edit]
In the hacker version:
- Save the shortened URL's in a database.
How you will be assessed[edit]
Your solution will be graded using the following axis:
Scope
- To what extent does your code implement the features required by our specification?
- To what extent is there evidence of effort?
Correctness
- To what extent did your code meet specifications?
- To what extent did your code meet unit tests?
- To what extent is your code free of bugs?
Design
- To what extent is your code written well (i.e. clearly, efficiently, elegantly, and/or logically)?
- To what extent is your code eliminating repetition?
- To what extent is your code using functions appropriately?
Style
- To what extent is your code readable?
- To what extent is your code commented?
- To what extent are your variables well named?
- To what extent do you adhere to style guide?
References[edit]
A possible solution[edit]
Click the expand link to see one possible solution, but NOT before you have tried and failed!
not yet!