File processing in Erlang -


is erlang option file processing of different types? example- reading pdf,word document,excel sheet , transforming them? know can use apache poi/tika java based , integrate using jerlang. not familiar erlang's bit syntax wanted check if erlang suited such kind of application without using apache poi?

erlang has great binary support makes great language parsing different kind of binaries.

i.e. decode tcp segment using binary syntax in erlang can like

decode(segment) ->     case segment of      << sourceport:16, destinationport:16,        sequencenumber:32,        acknumber:32,        dataoffset:4, _reserved:4, flags:8, windowsize:16,        checksum:16, urgentpointer:16,        payload/binary>> when dataoffset>4     ->         optsize = (dataoffset - 5)*32,         << options:optsize, message/binary >> = payload,         <> = <>,         %% can process message according         %% options (if any) , flags cwr, ..., fin.          binary_to_list(message)     end.

which compared other languages super easy way use pattern matching , binary support decode/encode binaries.

nevertheless, erlang more concurrent processing , message passing between processes, wouldn't use transform/parse binaries, instead use erlang manage web server/api , handle concurrent connections, , delegate job of transforming documents raw c/c++ performance, plus on c/c++ or either on java have richer libraries work pdf/excel/word documents


Comments

Post a Comment

Popular posts from this blog

searchKeyword not working in AngularJS filter -

i writing app using angularjs on front end. want search through table word/field; 1 search box everything. according article here: http://hello-angularjs.appspot.com/searchtable can use filter: searchkeyword this. this code, , not working expected. <label>search: <input ng-model="searchkeyword"></label> <table ng-repeat="post in posts | orderby: sort | filter: searchkeyword"> <tr> <td> {{index(post)}} </td> <td> {{post.title}} </td> <td> {{post.author}} </td> <td> {{post.content}} </td> <td> {{post.date | date: "d/m/yyyy"}} </td> </tr> </table> what should do? thank you try this: controller $scope.posts = [ {title:'title one', author:'author one', content: 'content one'}, {title:'title two', author:'author two', content: 'cont...
Read more

sequelize.js - Sequelize: sort by enum cases -

i have model ( article ) field (the name type ) of type enum('source', 'translated') , return 1 article ordered type field. source articles should returned before translated articles. like: article.findone(order: [ { type: [ 'source', 'translated' ] } ]); unfortunately there appears no built-in solution sorting enums. instead have sort by case , couldn't find documentation on how sequelize. what conventional approach here? sorting case hard in sequelize, sort field (the second answer in linked post) should possible: order: sequelize.fn('field', sequelize.col('type'), 'source', 'translated') it's supported mysql far know though
Read more

user interface - how to replace an ongoing process of image capture from another process call over the same ImageLabel in python's GUI TKinter -

i trying use following code create interactive gui changes color-space(hsv, rbg, grayscale etc) on event of button click. display opencv video in tkinter using multiprocessing being new python having problems multiprocessing , attempts on making gui change it's color space on button clicks hangs entire system. on it's implementation highly appreciated. thankyou. below code: import cv2 pil import image,imagetk import tkinter tk import numpy np multiprocessing import process , queue def quit_it(root,process): root.destroy() process.terminate() def black_andwhite(root,process): process.terminate p=process(target=capture_image, args=(5,queue, )) p.start() root.after(0, func=lambda: update_all(root, image_label, queue)) def update_image(image_label, queue): frame = queue.get() = image.fromarray(frame) b = imagetk.photoimage(image=a) image_label.configure(image=b) image_label._image_cache = b root.update() def update_all(root...
Read more