Digests » 218
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this week's favorite
With trade volumes reaching billions of dollars a day and market caps hitting tens of billions of dollars, it’s no wonder that cryptocurrencies fuel the gold rush of the modern day.
We do a lot of interviewing at Triplebyte. Indeed, over the last 2 years, I've interviewed just over 900 engineers. Whether this was a good use of my time can be debated! (I sometimes wake up in a cold sweat and doubt it.) But regardless, our goal is to improve how engineers are hired. To that end, we run background-blind interviews, looking at coding skills, not credentials or resumes.
This is the story of GreenPiThumb: a gardening bot that automatically waters houseplants, but also sometimes kills them.
A Trie (pronounced "try") is a tree data structure that is used to store Strings. It's generally used to search and store by prefix, which is why it is also known as a "prefix tree." Tries can often come up in software engineering interviews, however they aren't generally taught in a typical Data Structures course. Like all data structures, they're often better understood by interacting with them.
A Hash Table is a common data structure used in many modern day Software applications. It provides a dictionary-like functionality, giving you the ability to perform opertations such as inserting, removing and deleting items inside it. Let’s just say I want to find what the definition of what “Apple” is, and I know the defintion is stored in my defined Hash Table. I will query my Hash Table to give me a defintion. The entry inside my Hash Table might look something like this "Apple" => "A green fruit of fruity goodness". So, “Apple” is my key and “A green fruit of fruity goodness” is my associated value.