b, ok: = val. ([] byte)
if it"s a conversion type, shouldn"t it be [] byte (val)? it"s similar to string (val)
.
b, ok: = val. ([] byte)
if it"s a conversion type, shouldn"t it be [] byte (val)? it"s similar to string (val)
. this is not a conversion type. The so-called type assertion (type assertion), simply looks at whether the type of val is [] byte
some val cannot directly use [] byte (val) or similar to string (val).
first of all, if the val type is uncertain, you will not be able to use a compiler similar to string (val),.
if you already know your val type, you don't have to execute b, ok: = val. ([] byte), do you?
then b, ok: = val. ([] byte), if ok is true, it means success, and b can be used.
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