n2 := copy(s, s[2:])            // n2 == 4, s == []int{2, 3, 4, 5, 4, 5}
n3 := copy(b, "Hello, World!")  // n3 == 5, b == []byte("Hello")
</pre>


<h3 id="Deletion_of_map_elements">Deletion of map elements</h3>

<p>
The built-in function <code>delete</code> removes the element with key
<code>k</code> from a <a href="#Map_types">map</a> <code>m</code>. The

pkg go/types, method (*Selection) Index() []int
pkg go/types, method (*Selection) Indirect() bool
pkg go/types, method (*Selection) Kind() SelectionKind
pkg go/types, method (*Selection) Obj() Object
pkg go/types, method (*Selection) Recv() Type
pkg go/types, method (*Selection) String() string
pkg go/types, method (*Selection) Type() Type
pkg go/types, method (*Signature) Params() *Tuple

			if !ok {
				continue
			}
			for _, spec := range d.Specs {
				if s, ok := spec.(*ast.ImportSpec); ok && s.Path.Value == `"C"` {
					// Replace "C" with _ "unsafe", to keep program valid.
					// (Deleting import statement or clause is not safe if it is followed
					// in the source by an explicit semicolon.)
					f.Edit.Replace(f.offset(s.Path.Pos()), f.offset(s.Path.End()), `_ "unsafe"`)
				}
			}
		}
	}

		File: []ZipTestFile{
			{
				Name:    "世界",
				Content: []byte{},
				Mode:    0644,
				// Name is valid UTF-8, but format does not have UTF-8 flag set.
				// We don't do UTF-8 detection for multi-byte runes due to
				// false-positives with other encodings (e.g., Shift-JIS).
				// Format says encoding is not UTF-8, so we trust it.
				NonUTF8:  true,

a "vendor/" prefix also maintains the invariant that standard
library packages begin with a dotless path element.

The module requirements of std and cmd do not influence version
selection in other modules. They are only considered when running
module commands like 'go get' and 'go mod vendor' from a directory
in GOROOT/src.

Maintaining vendor directories
==============================

pkg syscall (linux-386), const RTF_WINDOW ideal-int
pkg syscall (linux-386), const RTF_XRESOLVE ideal-int
pkg syscall (linux-386), const RTM_BASE ideal-int
pkg syscall (linux-386), const RTM_DELACTION ideal-int
pkg syscall (linux-386), const RTM_DELADDR ideal-int
pkg syscall (linux-386), const RTM_DELADDRLABEL ideal-int
pkg syscall (linux-386), const RTM_DELLINK ideal-int

_ = imag(3 << s)                   // illegal: 3 assumes complex type, cannot shift
</pre>

<p>
Arguments of type parameter type are not permitted.
</p>


<h3 id="Deletion_of_map_elements">Deletion of map elements</h3>

<p>
The built-in function <code>delete</code> removes the element with key
<code>k</code> from a <a href="#Map_types">map</a> <code>m</code>. The

pkg syscall (linux-386), const RTF_WINDOW = 128
pkg syscall (linux-386), const RTF_XRESOLVE = 2048
pkg syscall (linux-386), const RTM_BASE = 16
pkg syscall (linux-386), const RTM_DELACTION = 49
pkg syscall (linux-386), const RTM_DELADDR = 21
pkg syscall (linux-386), const RTM_DELADDRLABEL = 73
pkg syscall (linux-386), const RTM_DELLINK = 17
pkg syscall (linux-386), const RTM_DELNEIGH = 29

pkg debug/pe, type COFFSymbolAuxFormat5 struct, NumRelocs uint16 #51868
pkg debug/pe, type COFFSymbolAuxFormat5 struct, SecNum uint16 #51868
pkg debug/pe, type COFFSymbolAuxFormat5 struct, Selection uint8 #51868
pkg debug/pe, type COFFSymbolAuxFormat5 struct, Size uint32 #51868
pkg encoding/binary, func AppendUvarint([]uint8, uint64) []uint8 #51644
pkg encoding/binary, func AppendVarint([]uint8, int64) []uint8 #51644

pkg syscall (linux-arm-cgo), const RTF_WINDOW ideal-int
pkg syscall (linux-arm-cgo), const RTF_XRESOLVE ideal-int
pkg syscall (linux-arm-cgo), const RTM_BASE ideal-int
pkg syscall (linux-arm-cgo), const RTM_DELACTION ideal-int
pkg syscall (linux-arm-cgo), const RTM_DELADDR ideal-int
pkg syscall (linux-arm-cgo), const RTM_DELADDRLABEL ideal-int
pkg syscall (linux-arm-cgo), const RTM_DELLINK ideal-int