erlang

问题 I'm trying to get push notifications working with ejabberd and I found this link here: https://github.com/diamondbybold/ejabberd_mod_offline_post where it should make a POST request at a URL for offline messages. I edited my ejabberd.yml file to include the URL and token, however, I'm running into some issues when trying to run it on Ejabberd 16.12. It runs, but I send a message to someone offline, I'm seeing the following error in /var/log/ejabberd/error.log 2017-02-07 09:12:19.359 [error]

问题 I'm trying to get push notifications working with ejabberd and I found this link here: https://github.com/diamondbybold/ejabberd_mod_offline_post where it should make a POST request at a URL for offline messages. I edited my ejabberd.yml file to include the URL and token, however, I'm running into some issues when trying to run it on Ejabberd 16.12. It runs, but I send a message to someone offline, I'm seeing the following error in /var/log/ejabberd/error.log 2017-02-07 09:12:19.359 [error]

问题 I`m learning Erlang and doing exercises from the book: "Write a function which returns a list of the format [1,2,..,N-1,N]. create(3) -> [1,2,3]." I have a solution, which is: create(N) -> create(1, N). create (M,M) -> [M]; create(M,N) -> [M | create(M+1, N)]. I went through it dozen of times, but I simply can`t understand what is happening on line 2 of the solution. Can please somebody explain? Thank you. EDIT. Ok, so i think I`m on the right track for understanding it. In line 2, the new

问题 Here's the proplist_file that I use to configure the httpd server: [ {modules, [ mod_alias, mod_actions, mod_cgi, mod_get, mod_esi, mod_log ]}, {bind_address, "localhost"}, {port,0}, {server_name,"httpd_test"}, {server_root,"/Users/7stud/erlang_programs/inets_proj"}, {document_root,"./htdocs"}, {script_alias, {"/cgi-bin/", "/Users/7stud/erlang_programs/inets_proj/cgi-bin/"} }, {erl_script_alias, {"/cgi-bin/example", [httpd_example]} }, {erl_script_nocache, true}, {error_log, "./errors.log"},

问题 Here's the proplist_file that I use to configure the httpd server: [ {modules, [ mod_alias, mod_actions, mod_cgi, mod_get, mod_esi, mod_log ]}, {bind_address, "localhost"}, {port,0}, {server_name,"httpd_test"}, {server_root,"/Users/7stud/erlang_programs/inets_proj"}, {document_root,"./htdocs"}, {script_alias, {"/cgi-bin/", "/Users/7stud/erlang_programs/inets_proj/cgi-bin/"} }, {erl_script_alias, {"/cgi-bin/example", [httpd_example]} }, {erl_script_nocache, true}, {error_log, "./errors.log"},

问题 Here's the proplist_file that I use to configure the httpd server: [ {modules, [ mod_alias, mod_actions, mod_cgi, mod_get, mod_esi, mod_log ]}, {bind_address, "localhost"}, {port,0}, {server_name,"httpd_test"}, {server_root,"/Users/7stud/erlang_programs/inets_proj"}, {document_root,"./htdocs"}, {script_alias, {"/cgi-bin/", "/Users/7stud/erlang_programs/inets_proj/cgi-bin/"} }, {erl_script_alias, {"/cgi-bin/example", [httpd_example]} }, {erl_script_nocache, true}, {error_log, "./errors.log"},

问题 Am trying to send data to an external api that expects encrypted data using 3DES encryption but am having issues understanding how to pass my api key as the key field to erlangs des_ede3 cipher. According to erlangs cipher docs des_ede3 expects 3 keys that are all 8 bytes in length. How can i pass my 24 byte api key as the key to elixir/erlang :cryptoblock_encrypt/4 function *** how can i pass key to block_encrypt/4 *** key = "123456789012345678901234" data = "hello world! The world is yours"

问题 I'm using Triq to write my property based test. How can I see what kind of data my generator produces? Let's say I have the following generator: -module (my). -include_lib("triq/include/triq.hrl"). -export([valid_type_gen/1]). valid_type_gen() -> non_empty(list(any())). I would like to examine what kind of data it generates, i.e. something like: $ rebar3 shell 1> my:valid_type_gen().sample() %??? [1,b,"blah"] 回答1: Ok, I figured it out, I just need to call the sample function: 1> hd(triq_dom

问题 I have a nested list of the form, {stack, "over", flow, ["is", "a"], ["knowledge", "sharing", "site"], "a", "b"} I am not able to cleanly decode the above tuple. I decode the above into a vector<vector<string> > However, If I replace the inner lists into a tuple, I am able to decode that fine. I doubt that the usage of ERL_NIL_EXT and ERL_LIST_EXT but the documentation is only a little helpful. Idea is if I get list inside my tuple, I am decoding that and returning a vector of strings and do

问题 Without using a third party module, what steps would I need to take to convert this: <<"Mon, 17 Feb 2014 11:07:53 GMT">> Into this?: [17, 2, 2014, 10, 07, 53] Most of the answers I've Googled suggest using a library. So far, I suspect I'd get somewhere by pattern matching the formatted date string. Something like: <<_:5/binary, Date:2/binary>> = <<"Mon, 17 Feb 2014 11:07:53 GMT">>... Which I think should produce the following 'match' Date = 17... That's based on an idea found here - https:/