Smalltalk collect on Go slice of int

package main

import "fmt"

type intSlice []int

func (i intSlice) collect(block func(i int) int) intSlice {
    r := make(intSlice, len(i))
    for j, v := range i {
        r[j] = block(v)
    return r

func main() {
    numbers := intSlice{1, 2, 3}
    squared := func(i int) int { return i * i }

    fmt.Printf("%v", numbers.collect(squared))

Try it.

Implementations of select,inject,detect are left as an excercise for the reader.

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