Tag: Slice

Find the Min or Max Value in a Slice (New to Go 1.21)

The latest Go release, 1.21, has introduced two new built-in functions: min() and max(). These functions have long been used in many other languages, such as Python and JavaScript, and are now welcome additions to Go. The min() and max() functions have been introduced to simplify the process of finding the smallest and largest numbers in a set, respectively. There was plenty of talk as to whether these should be included as “built-ins” or introduced into the cmp package.

#min#max#data#go1.21#sort#slice#generics#builtins#built-in#cmp

How to Write Data to CSV in Go

In Go, you can use the standard library package encoding/csv [docs] to write data to a CSV file. Below is a example that shows you how you can write a slice of user-data related strings to a CSV file. The code creates a new file called users.csv and writes a slice of records to it. Finally, the Flush method is used to flush any buffered data to the underlying io.Writer, which is the file.

#csv#write#encoding#flush#struct#slice#users#people#file

Find the Length of an Array

You can find the length of an array, or to be correct a slice or map, in Go by using the standard library function len(). We use the term array loosely here, as a general variable holding multiple things. Maps tend to have defined keys, whereas slices don’t (more info on the difference here). We have shown both as examples below, how to get the length of a slice and how to get the length of a map. In Golang, the method is the same for both.

#array#slice#map#length#append#size#sizeof#items#number