Advanced Techniques in Go Programming/

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Solution 2: Composite Data Types

Solution 2: Composite Data Types

Let’s solve the challenges set in the previous lesson.

We'll cover the following...

Problem 1: Solution

Here's the updated code that separates the fields of a record based on the # character:

csvData.go
Code explanation
  • Line 49: Here, csvwriter.Comma = '#', the default field delimiter for the CSV data, is changed from a comma (,) to a hash (#) symbol. This change will ensure that each field of a record in the CSV file is separated by a # symbol.
  • Line 51: temp := []string{row.Name, row.Surname, row.Number, row.LastAccess} creates an array of strings temp, which stores the values of the fields of a record. This line ensures that the fields of a record are separated by a # symbol when written to the CSV file.
  • Line 74: line := strings.Split(line, "#") splits the fields of a record in the input CSV file based on the # symbol. This line ensures that the fields of a record are properly separated and stored in the line array.
Following is the output of the code above:
# cat csv.data
Dimitris#Tsoukalos#2101112223#1600665563
Mihalis#Tsoukalos#2109416471#1600665563
Jane#Doe#0800123456#1608559903
# go run csvData.go csv.data output.data
{Dimitris Tsoukalos 2101112223 1600665563}
{Mihalis Tsoukalos 2109416471 1600665563}
{Jane Doe 0800123456 1608559903}
# cat output.data
Dimitris#Tsoukalos#2101112223#1600665563
Mihalis#Tsoukalos#2109416471#1600665563
Jane#Doe#0800123456#1608559903
Problem 2: Solution
Here’s a sample implementation in Go ...