Hash to custom array implementation

Question

Last newbie question for today. There is a hash:

h = {a: 1, b: 2, c: 3}

How to implement convert_to_arr(h) method with such output:

convert_to_arr(h) 
# ["Key: 'a', Value: '1'",  
# "Key: 'b', Value: '2'",  
# "Key: 'c', Value: '3'"]

Thanks!

Answer 1

{a: 1, b: 2, c: 3}.map { |key, value| "Key: '#{key}', Value: '#{value}'" }

=> ["Key: 'a', Value: '1'", "Key: 'b', Value: '2'", "Key: 'c', Value: '3'"]

Answer 2

h = {a: 1, b: 2, c: 3}
h.map{|k,v| "key: '#{k}' ,val: '#{v}'"}
# => ["key: 'a' ,val: '1'", "key: 'b' ,val: '2'", "key: 'c' ,val: '3'"]

Answer 3

You could always implement a struct:

struct keyItem
{
    char key[30];
    int value;
}

And then do something like this:

keyItem h[3] =
{
    { "a", 1 },
    { "b", 2 },
    { "c", 3 }
}

Your function like this:

void print_keys(keyItem[] k, int size)
{
    for (int i = 0; i < size; i++)
    {
        printf("Key: \"%s\", Value: '%d'\n", k[i].key, k[i].value);
    }
}