Converting Slices to Arrays in Go
While attempting to develop an RPM file reader, you may encounter the need to assign a slice to an array field in a struct. This can be a tricky task in Go, as there is no built-in method for direct conversion.
To work around this limitation, consider the following options:
Using copy with a Slice Pretense:
The copy method can be tricked into copying a slice to an array by creating a temporary slice with the same underlying array as the target array.
varLead := Lead{}
magicSlice := someSlice[0:4] // Create a temporary slice that references the array underlying the array field
copy(varLead.Magic[:], magicSlice)
Manual Loop-Based Assignment:
Alternatively, you can loop over the slice and manually assign each element to the corresponding array element.
for index, b := range someSlice {
varLead.Magic[index] = b
}
Literal Conversion:
If the array size is fixed, you can use literal values to initialize the array directly.
type Lead struct {
Magic [4]byte
// Other fields...
}
lead := Lead{
Magic: [4]byte{0x12, 0x34, 0x56, 0x78},
}The above is the detailed content of How Can I Convert a Slice to an Array in Go?. For more information, please follow other related articles on the PHP Chinese website!
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