tag:blogger.com,1999:blog-3519606278200777308.post8475741387939745595..comments2023-10-20T23:01:01.979+08:00Comments on olv: 一千零一夜之 BitBake Data classolvhttp://www.blogger.com/profile/14109154724494271204noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3519606278200777308.post-39745455025376481892008-12-28T19:56:00.000+08:002008-12-28T19:56:00.000+08:001.+=A = "foo"A += "bar"===>...1.+=<BR/>A = "foo"<BR/>A += "bar"<BR/>===> A = "foo bar"<BR/><BR/>2.:=<BR/>xx.bb<BR/>A=3<BR/>B=$(A)<BR/>xx.inc<BR/>A=4<BR/>====> B=4<BR/>but, if we use B:=$(A), then B=3<BR/><BR/>3. ?=<BR/>A?=3<BR/>if data["A"]:<BR/> pass<BR/>else <BR/> data["A"]=3<BR/><BR/>eg. we can use it for preferred versionerinhttps://www.blogger.com/profile/17766743879857803642noreply@blogger.com