Type & Coercion Errors

Invalid argument type

Matches: invalid '([^']+)' argument

WHAT THIS ERROR MEANS

An argument you passed to a function is the wrong type. The function expected one type but received another.

1. Read the function documentation with ?function_name.

2. Check what type the argument should be.

3. Convert your input to the correct type.

BAD — THIS CAUSES THE ERROR

substr("hello", "2", "4")  # indices should be numeric

GOOD — CORRECT APPROACH

substr("hello", 2, 4)

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