Truthiness

In Shim, non-empty and non-zero values are considered truthy. Empty containers and zero values are falsy. Here are some examples of falsy values:

• false
• None
• 0
• 0.0
• ""
• []
• {:}
• {,}
• ()

Essentially all other values are truthy. All structs are truthy, non-zero-sized tuples are truthy, non-empty lists/dicts/sets are truthy, non-empty strings are truthy, and functions are truthy.

let values = [
    false,
    None,
    0,
    0.0,
    "",
    [],
    {:},
    {,},
    (),
    true,
    1.0,
    -1,
    "test",
    ["non-empty"],
    {"non-empty",},
    {"key": "non-empty"},
    ("val",),
]
for value in values {
    let rstr = repr(value)
    for _ in rstr.len()..21 {
        rstr += " "
    }
    print(rstr, bool(value))
}

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