goLogic errorEasy

Incorrect capacity passed to make slice function

Time: 0:00

BugFind the bug and fix the code

What it should do

Create slice of size n and append indices. Example: populateIndices(3) -> [0, 1, 2]

What happens instead

Output slice contains [0, 0, 0, 0, 1, 2] due to initial non-zero length

package main

import "fmt"

func populateIndices(n int) []int {
	// Initializes slice with n zero-elements, then appends
	res := make([]int, n)
	for i := 0; i < n; i++ {
		res = append(res, i)
	}
	return res
}

func main() {
	fmt.Println(populateIndices(3))
}

Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).

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This bug belongs to the logic errors pattern

The wrong operator, an inverted condition, a formula the right way round but backwards.

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package main import "fmt" func populateIndices(n int) []int { // Initializes slice with n zero-elements, then appends res := make([]int, n) for i := 0; i < n; i++ { res = append(res, i) } return res } func main() { fmt.Println(populateIndices(3)) }

Incorrect capacity passed to make slice function

What it should do

What happens instead

More logic errors to practise

Incorrect capacity passed to make slice function

What it should do

What happens instead

More logic errors to practise