public/subjects/countif

countif

Instructions

Write a function CountIf that returns the number of elements of a string slice for which the f function returns true.

Expected function

func CountIf(f func(string) bool, tab []string) int {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
	"piscine"
)

func main() {
	tab1 := []string{"Hello", "how", "are", "you"}
	tab2 := []string{"This","1", "is", "4", "you"}
	answer1 := piscine.CountIf(piscine.IsNumeric, tab1)
	answer2 := piscine.CountIf(piscine.IsNumeric, tab2)
	fmt.Println(answer1)
	fmt.Println(answer2)
}

And its output :

$ go run .
0
2
$

Notions

• Function literals
• Function declaration
• Function types