Hi I'm Alexey Berezin, who loves London 🏴, players ⏯ and TypeScript 🦺.
A breakdown of the key projects, open-source work, and professional achievements that helped me secure the UK Global Talent visa in tech. This post highlights the impact and leadership demonstrated through real-world engineering initiatives.
To highlight specifics of working with low-tier devices, to demonstrate its MSE issues and to show how to mitigate them.
Pros and cons of enums in TypeScript
Given a string in any case, returns a string in camel case
The power of TypeScript will be revealed by the example of several tasks from type-challenges of the hard level.
Given an object, returns object with all optional fields
Given a number as string literal type, returns a number as number literal type
Given a string and a separator, returns an array or a tuple with the substrings between the separator
Given a tuple and a filter, returns the tuple without elements that are part of the filter
Given two objects, returns the object which is formed as a spread of two objects in TypeScript
Given a number as a string, return its absolute value as a string too
Given a string, return a union of all characters from the string
We have spread on objects in JavaScript so we can add value by the specified key, let's find out how to do that in TypeScript.
Given the tuple, make it flatten as Array.prototype.flat when pass Infinity
Given the string, calculate its length. Also try to find the maximum computable string length having a limit of recursive calls
Given a union, return a union of tuples with all possible permutations (all possible positions of elements without repetition)
Given the function and the type, include the type as the following argument in the list of function arguments
Given the string, replace all string occurrences with specified string
Given the string, replace first string occurrence with specified string
Uppercase, Lowercase, Capitalize and Uncapitalize since TypeScript 4.1
Given the string, remove whitespaces from the beginning and the end
Given the string, remove whitespaces from the beginning
Structural type system, workaround in TypeScript, unique symbol and code examples
Given a union of several types, remove those types which doesn't extend the specified structure
Given the tuple with Promise elements, return Promise of tuple
Given the tuple, implement Pop, Shift, Push and Unshift methods like Array.prototype has
Given the tuple, return its last element
Given API, collect the object with keys and values after each call
Given the tuple, return a union of tuple elements
Given the object, return object where all properties on all levels are readonly
Given the object and a union of properties, return object where those properties are readonly
Given the object and a union of properties, return the object but without those properties
Given the function, we need to extract what it returns
Given the tuple and the type, return true if the type is an element of the tuple. Otherwise, return false
Given two tuples, put the elements of both of them into the resulting tuple
Given the boolean, in case of true return first type, otherwise second one
Given the promise, return the value after applying await recursively
Given two unions, remove all the elements of the second one from the first union
Given the tuple, return its length
Given the tuple, return its first element
Given the tuple, we need to get object where key and value equals to the elements of the tuple
Given the object, we need to make properties on the first level readonly
Given existing type or interface, we need to extract part of properties
Easy, medium, hard and extreme step by step solutions to type challenges in TypeScript
Basic implementation of getting a value in an object, optional paths, array and tuples, one solution with connection to JavaScript
Developed features, team members and collaboration inside the team
Code obfuscation using confusion and the way how to make it readable again
Subtitles with WebVTT, statistics and DRM
Geolocation identification in iPlayer
From video tag to the implementation, state machine, the way bundle is loaded, bundle names