Exploration of String package in Go

It is an in-depth discussion about strings and the strings package, some cool methods, and performance.

Transcript

1. Strings Package Exploration of its design and usage Golang Meetup - Sat 20, 2019
2. What is a string in Go?
3. Strings Strings in Go are just a read-only slice of bytes. This means that it can be treated as a read-only slice. https://play.golang.org/p/Ne4u1B0YQ6C
4. Strings package Strings are built from bytes so indexing them yields bytes, not characters. UTF-8 is a central part of their design. Source - go blog strings package has the following files builder.go compare.go reader.go replace.go search.go strings.go
5. Compare function like ==, <=, >= comparison operators
6. Contains function is used to check if a string contains a substring
7. Repeat function returns a new string according to the count specified and the string provided
8. Map function returns the copy of a string with modified characters according to the mapping function
9. String Builder A Builder is used to efficiently build a string using Write methods. It minimizes memory copying - https://golang.org/pkg/strings/ We can talk about performance here.
10. Can you spot the difference between these 2 algorithms? SentenceBuilder 1
11. Can you spot the difference between these 2 algorithms? SentenceBuilder 2
12. This is what happened In StringBuilder 1, in the for loop, on each concatenation, a new copy of the string is created and subsequent strings are copied over, character by character this leads to an algorithm complexity of O(n2). In StringBuilder 2, in the for loop, on each concatenation, we are appending the string to a buffer, which is a slight of byte, and return the accumulated string. Copying is greatly reduced.
13. You can learn a lot about writing good Go code just by reading the package documentation and implementations. I’ll encourage us to do more of it when we can. Also do some study on ASCII, Unicode, Encodings esp. UTF-8.
14. Thank You! Email: olumideralph@gmail.com Github: https://github.com/Lumexralph Website: http://lumexralph.github.io/