From b74f9d656a028430d942fb609f79c4027f0549fa Mon Sep 17 00:00:00 2001 From: Tanaka Akira Date: Mon, 25 Oct 2021 12:25:13 +0900 Subject: add example for buffer: argument of pack. --- pack.rb | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'pack.rb') diff --git a/pack.rb b/pack.rb index 019fa80be4..e4d629e0f2 100644 --- a/pack.rb +++ b/pack.rb @@ -33,6 +33,16 @@ class Array # the offset, the rest of offsetOfBuffer are overwritten by the result. # If it's shorter, the gap is filled with ``\0''. # + # # packed data is appended by default + # [255].pack("C", buffer:"foo".b) #=> "foo\xFF" + # + # # "@0" (offset 0) specifies that packed data is filled from beginning. + # # Also, original data after packed data is removed. ("oo" is removed.) + # [255].pack("@0C", buffer:"foo".b) #=> "\xFF" + # + # # If the offset is bigger than the original length, \x00 is filled. + # [255].pack("@5C", buffer:"foo".b) #=> "foo\x00\x00\xFF" + # # Note that ``buffer:'' option does not guarantee not to allocate memory # in +pack+. If the capacity of aBufferString is not enough, # +pack+ allocates memory. -- cgit v1.2.3