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App Inventor 2 连接打印机(Printer),自定义打印的实现 - App Inventor ...

App Inventor 2 连接打印机(Printer),自定义打印的实现ai2_printer应用介绍本教程主要分享App Inventor 2连接网络打印机进行自定义打印的思路及方法,这里只进行思路的讲解及关键步骤的效果演示,细节需自行完善。主要用到社交应...
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Deleting all pending tasks in celery / rabbitmq

... From the docs: $ celery -A proj purge or from proj.celery import app app.control.purge() (EDIT: Updated with current method.) share | improve this answer | follow...
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Xcode “The private key for is not installed on this mac - distributing”

I always get this message when I try to submit my app to the app store. 21 Answers 21 ...
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App Inventor 2 项目合并工具 AIMerge · App Inventor 2 中文网

创建 Apps 首页 关于我们 关于我们 发布日志 服务条款 教育 中文教程 中文社区 反馈 我要反馈 App Inve...
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AngularJS : Where to use promises?

...ookForAuthentication accepts a callback for failure and success, but what happens when FB.login succeeds but FB.api fails? This method always invokes the success callback regardless of the result of the FB.api method. Now imagine that you're trying to code a robust sequence of three or more asyn...
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mongoose vs mongodb (nodejs modules/extensions), which better? and why?

... I'm building new app and designing now structure of it, here are some thoughts about why to use or not to use mongoose: Mongoose will be slower (for big apps) Mongoose is harder with more complicated queries There will be situations when yo...
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How can I make the Android emulator show the soft keyboard?

... found out how to do this on the Android emulator itself (Menu, "Settings" App - not the settings of the emulator outside). All you need to do is: open settings app -> Language & Input -> Go to the "Keyboard & Input Methods -> click Default This will bring up a Dialog in which case ...
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node.js, socket.io with SSL

...is how I managed to set it up with express: var fs = require( 'fs' ); var app = require('express')(); var https = require('https'); var server = https.createServer({ key: fs.readFileSync('./test_key.key'), cert: fs.readFileSync('./test_cert.crt'), ca: fs.readFileSync('./test_ca.c...
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Client-server synchronization pattern / algorithm?

...eral use cases. Synchronize changes. Your change-log (or delta history) approach looks good for this. Clients send their deltas to the server; server consolidates and distributes the deltas to the clients. This is the typical case. Databases call this "transaction replication". Client has lost...
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JSON serialization of Google App Engine models

...success. My project isn't using Django, is there a simple way to serialize App Engine models (google.appengine.ext.db.Model) into JSON or do I need to write my own serializer? ...