@Box: $[value] {
    dilambda[
        ${ value },
        $[new] { value = new }
   ]
}

@Array2d: $[w, h] {
    @data: array#new[w * h, 0]
    dilambda[
        $[x, y] { data[x + (y * w)] },
        $[x, y, new] { data[x + (y * w)] = new }
    ]
}

@print: $[x] { printf["x -> %a\n", x] }
@x = Box[-7]
x[] *= 2
print[x[]]
x[] = 'abcdef
print[x[]]

@m: Array2d[10, 10]
FOR [@x: 0][< 10][+ 1]
    FOR [@y: 0][< 10][+ 1]
        m[x, y] = x ^ y

printf["%a == %a\n", m[3,7], 3^7]

@add: $[*] {
    @acc = 0
    FOR [@i: 0][< SEL$][+ 1]
        acc += SEL[i]
    acc
}

printf["4+1+3: %a\n", add[4,1,3]]

@gather: $[*] { SEL[*] }

printf["test %a\n", gather[-1, (), 'x]]

@map: $[f, xs] {
    @ys: array#new[xs.len]
    FOR [@i: 0][< xs.len][+ 1]
        ys[i] = f[xs[i]]
    ys
}

printf["maps %a\n", map["abcd", #[1,2,0]]]

@inspect: $[m] {
    printf["%a\n", m]
}

@r: #{"a" 1, "b" 2, 0 "a"}
r[0]=r

printf["r: "] inspect[r]
printf["r.a -> %a\n", r[0].a]
${
    inspect [#{0 3,"a" 3}]
}[]