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Goal

Fill in two functions that build text with fmt.Sprintf: Summary reports an average with two decimals, and Badge reports how many symbols and bytes a name has.

Example

Name, Total, Count = "Ada", 10, 3
fmt.Println(Summary()) // Ada: 3 items, average 3.33
fmt.Println(Badge())   // "Ada" (3 symbols, 3 bytes)

Name = "héllo"
fmt.Println(Badge())   // "héllo" (5 symbols, 6 bytes)

10 divided by 3 is 3.333..., and %.2f rounds it to 3.33. In Badge, the name is wrapped in double quotes, and the symbol count and byte count differ for héllo.

Rules

• Edit summary.go. Each function has a // TODO comment and a return line you will change.
• Name, Total and Count are variables outside the functions. The tests give them different values, so read them each time the functions run.
• Summary returns exactly <Name>: <Count> items, average <Total divided by Count, with 2 decimals>. The average must keep its decimals, so convert both numbers to float64 before dividing. Count is never zero.
• Badge returns exactly <Name in double quotes> (<symbols> symbols, <bytes> bytes). Use %q for the quotes.
• Build both results with fmt.Sprintf. You will need import "fmt" and import "unicode/utf8" at the top of the file.
• Do not change the three var lines or the func lines.

What you'll practice

Filling a template with Sprintf verbs (%s, %d, %.2f, %q), converting between number types before dividing, and counting symbols against bytes.

Run it

gonomicon fetch week-1/09-05-build-the-summary
cd 09-05-build-the-summary
gonomicon test
gonomicon submit

Hints

1. Sprintf builds the text from a template. %s fills in a string, %d a whole number, %.2f a decimal with two digits, and %q a string in double quotes.
2. The average needs decimals, so convert both numbers first: float64(Total) / float64(Count). For Badge, count symbols with utf8.RuneCountInString(Name) and bytes with len(Name).
3. Summary: fmt.Sprintf("%s: %d items, average %.2f", Name, Count, float64(Total)/float64(Count)). Badge: fmt.Sprintf("%q (%d symbols, %d bytes)", Name, utf8.RuneCountInString(Name), len(Name)).