这是一个简单的编译Erlang的Makefile模板，仅供参考。
# leave these lines alone
.SUFFIXES: .erl .beam .yrl
.erl.beam:
erlc -W $<
.yrl.erl:
erlc -W $<
ERL = erl -boot start_clean
# Here's a list of the erlang modules you want compiling
# If the modules don't fit onto one line add a \ character
# to the end of the line and continue on the next line
# Edit the lines below
MODS = module1 module2 \
module3 ... special1 ...\
...
moduleN
# The first target in any makefile is the default target.
# If you just type "make" then "make all" is assumed (because
# "all" is the first target in this makefile)
all: compile
compile: ${MODS:%=%.beam} subdirs
## special compilation requirements are added here
special1.beam: special1.erl
${ERL} -Dflag1 -W0 special1.erl
## run an application from the makefile
application1: compile
${ERL} -pa Dir1 -s application1 start Arg1 Arg2
# the subdirs target compiles any code in
# sub-directories
subdirs:
cd dir1; $(MAKE)
cd dir2; $(MAKE)
...
# remove all the code
clean:
rm -rf *.beam erl_crash.dump
cd dir1; $(MAKE) clean
cd dir2; $(MAKE) clean二进制型是一种十分节省空间的保存大批量数据的方式，并且Erlang虚拟机对其做了优化，十分高效。
<<>>
<<E1, E2, ..., En>>
% 每个Ei元素都标示出二进制型或位串的一个片段。单个Ei元素可以有4种形式。
Ei = Value |
Value:Size |
Value/TypeSpecifierList |
Value:Size/TypeSpecifierList如果表达式的总位数是8的整数倍，就会构建一个二进制型， 否则构建一个位串。
Value 必须是已绑定变量，字符串，或是能得出整数，浮点数或二进制型的表达式。
Size 必须是整数，默认值取决于不同的数据类型，整数8，浮点数64，二进制型则是就二进制型的大小。
TypeSpecifierList 类型指定列表，形式为End-Sign-Type-Unit。任何被省略项，取其默认值。
一个片段的总长度是Size x Unit字节。binary类型的片段长度必须是8的整数倍。
byte_reverse(Bin) when is_binary(Bin) ->
Size = bit_size(Bin),
<<TBin:Size>> = Bin,
<<TBin:Size/little>>.bit_reverse(Bin) when is_binary(Bin) ->
bit_reverse(Bin, <<>>).
bit_reverse(<<>>, RBin) -> RBin;
bit_reverse(Bin, RBin) ->
<<B:1, C/bitstring>> = Bin,
bit_reverse(C, <<B:1, RBin/bitstring>>).-define(IP_VERSION, 4).
-define(IP_MIN_HDR_LEN, 5).
...
DgramSize = byte_size(Dgram),
case Dgram of
<<?IP_VERSION:4, HLen:4, SrvcType:8, TotLen:16,
ID:16, Flags:3, FragOff:13, TTL:8, Proto:8,
HdrChkSum:16, SrcIP:32, DestIP:32,
RestDgram/binary>> when HLen >= 5, 4*HLen =< DgramSize ->
OptsLen = 4*(HLen - ?IP_MIN_HDR_LEN),
<<Opts:OptsLen/binary, Data/binary>> = RestDgram,
...在大多数编程语言里，最小可寻址存储单元的宽度通常是8位。而Erlang最小可寻址存储单元是1位，无需任何位移和掩码操作，依靠威力强大的模式匹配即可轻松完成位级别操作。
sudo apt-get install build-essential libncurses5-dev openssl libssl-devsudo apt-get install fop xsltproc unixodbc-dev libwxgtk3.0-dev freeglut3-dev./configure
make
sudo make install由于Google没有将最新的HttpClient集成到Android系统中, 导致在Android不能使用最新版HttpClient, 为此Apache对此做了兼容性处理HttpClient for Android。
以提交Multipart/form-data为例。
/* 为了避免与Android HttpClient的冲突,HttpClient for Android对存在冲突的类以*HC4命名,例如:HttpPostHC4。*/
...
SSLContext sslContext = SSLContexts.createSystemDefault();
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
sslContext,
SSLConnectionSocketFactory.STRICT_HOSTNAME_VERIFIER);
CloseableHttpClient httpClient = HttpClientBuilder.create()
.setSSLSocketFactory(sslsf).build();
HttpPostHC4 httpPost = new HttpPostHC4(url);
httpPost.setHeader("Accept", "application/json; charset=UTF-8");
MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
multipartEntityBuilder.addPart("username", new StringBody(username, ContentType.create("text/plain", Consts.UTF_8)));
multipartEntityBuilder.addPart("head_img", new FileBody(file, ContentType.create("image/jpeg", Consts.UTF_8)));
httpPost.setEntity(multipartEntityBuilder.build());
CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity resEntity = httpResponse.getEntity();
String json = EntityUtilsHC4.toString(resEntity, "UTF-8");
...更多HttpClient范例见官方文档