Welcome to day 4 of 7 Days of JavaScript!
Today we will see how to reverse a string. It’s probably the most asked question ever on technical interviews.
So the statement is quite simple, although the problem has an unexpected complexity when you face it for the first time: write a function that takes a string and returns the string reversed.
Here’s an example:
reverseString('Japan')
...
'napaJ'
Give it a try.
You can see the solutions I made here.
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Type is an everyday concept to programmers, but it’s surprisingly difficult to define it succinctly. I find it helpful to use Set as a conceptual model instead.
One extremely powerful typescript feature is automatic type narrowing based on control flow. This means a variable has two types associated with it at any specific point of code location: a declaration type and a narrowed type.
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Luca Liu -
Hanzla Baig -
Luca Liu -
sharathchandark -
Top comments (2)
That's I think the best way to do it!