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author | Andrew Gerrand <adg@golang.org> | 2011-06-29 14:58:01 +1000 |
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committer | Andrew Gerrand <adg@golang.org> | 2011-06-29 14:58:01 +1000 |
commit | 87ed339c0b7309744c769eb0f31cefc1b7013ef2 (patch) | |
tree | e8d9824ece9bf6116788d8ec008ffb28cf968d12 | |
parent | b97be3c485e487519d9ed178f6aff1414232b4da (diff) | |
download | go-87ed339c0b7309744c769eb0f31cefc1b7013ef2.tar.gz |
[release-branch.r58] doc/faq: add question about converting from []T to []interface{}
??? CL 4639046 / 995095e59d58
doc/faq: add question about converting from []T to []interface{}
R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/4639046
???
R=r
CC=golang-dev
http://codereview.appspot.com/4630077
-rw-r--r-- | doc/go_faq.html | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/go_faq.html b/doc/go_faq.html index 953092f05..ef70033ac 100644 --- a/doc/go_faq.html +++ b/doc/go_faq.html @@ -598,6 +598,24 @@ the interface idea. Sometimes, though, they're necessary to resolve ambiguities among similar interfaces. </p> +<h3 id="convert_slice_of_interface"> +Can I convert a []T to an []interface{}?</h3> + +<p> +Not directly because they do not have the same representation in memory. +It is necessary to copy the elements individually to the destination +slice. This example converts a slice of <code>int</code> to a slice of +<code>interface{}</code>: +</p> + +<pre> +t := []int{1, 2, 3, 4} +s := make([]interface{}, len(t)) +for i, v := range t { + s[i] = v +} +</pre> + <h2 id="values">Values</h2> <h3 id="conversions"> |