erlang

1.安装docker toolbox 1）在官网上下载OS上需要的docker toolbox。 2）下载完成后，像安装OS上的软件一样来安装docker toolbox。安装完成后，你会发现此时安装了一个virtualbox。同时也安装了docker的相关命令，比如docker-machine等。 2.安装docker虚拟机 利用上述步骤安装的docker-machine来安装一个docker虚拟机，名字为default，命令是docker-machine run default. 此时就会创建一个虚拟机叫做default。 3.连接虚拟机 这里直接给出命令了:docker-machine ssh default.如果你再宿主机上安装了多个虚拟机，你可以使用docker-machine ls来查看。同时，你也可以使用docker-machine env default来查看虚拟机的信息。 4.拉取镜像 通过第三步以后，你已经连接上虚拟机了。因此，你可以直接在里面来拉取docker的镜像了。我这里拉取了ubuntu最新的镜像。命令是docker pull ubuntu ，针对国内下载镜像很慢的情况，国内的DaoCloud做了一个镜像，在使用他的镜像之前，你需要在虚拟机上使用命令来安装他的一个加速器，安装加速器后，速度蹭蹭往上加快。命令是：curl -sSL https://get

I'm just learning, and really liking, the Actor pattern. I'm using Scala right now, but I'm interested in the architectural style in general, as it's used in Scala, Erlang, Groovy, etc. The case I'm thinking of is where I need to do things concurrently, such as, let's say "run a job". With threading, I would create a thread pool and a blocking queue, and have each thread poll the blocking queue, and process jobs as they came in and out of the queue. With actors, what's the best way to handle this? Does it make sense to create a pool of actors, and somehow send messages to them containing or

I am unable to get any dependency from github using rebar. rebar.config file: {sub_dirs, ["rel"]}. {deps_dir, ["deps"]}. {erl_opts, [debug_info]}. {deps, [ {thrift_erl, "0.5.0", {git, "git://github.com/xslogic/thrift_erl", "HEAD"}}, {eleveldb, "1.0.1", {git, "git://github.com/xslogic/eleveldb", "HEAD"}} ]}. When I do ./rebar compile I get: Dependency not available: thrift_erl-0.5.0 ({git, "git://github.com/xslogic/thrift_erl", "HEAD"}) Dependency not available: eleveldb-1.0.1 ({git, "git://github.com/xslogic/eleveldb", "HEAD"}) It keeps looking for DEP_NAME with a dash at the end and can't

I can use nif's if I write the escript myself, however when I use rebar escriptize the nif functions cannot be found. I think it is because *.so objects are not getting packed like beam files. Here is an simple example; rebar.config : {deps, [ {'jiffy', "", {git, "https://github.com/davisp/jiffy.git", {branch, master}}} ]}. {escript_incl_apps, [jiffy]}. %% I tried this to see what happens if the so got in there but didn't help {escript_incl_extra, [{"deps/jiffy/priv/jiffy.so", "/path/to/my/proj"}]}. test.erl : -module(test). -export([main/1]). main(_Args) -> jiffy:decode(<<"1">>), ok. rebar

I need to convert {{2012, 9, 21}, {13, 21, 11}} into timestamp(). How can I do that? Thank you. Corrected version: Seconds = calendar:datetime_to_gregorian_seconds(DateTime) - 62167219200, %% 62167219200 == calendar:datetime_to_gregorian_seconds({{1970, 1, 1}, {0, 0, 0}}) {Seconds div 1000000, Seconds rem 1000000, 0}. You might use this to_timestamp({{Year,Month,Day},{Hours,Minutes,Seconds}}) -> (calendar:datetime_to_gregorian_seconds( {{Year,Month,Day},{Hours,Minutes,Seconds}} ) - 62167219200)*1000000; This is part of module from this Github/Arboreus 来源： https://stackoverflow.com/questions