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连接打印机 · App Inventor 2 中文网
App教程 帮助 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。主要用到社交应用组件中的信息分享...
连接打印机 · App Inventor 2 中文网
App教程 帮助 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。主要用到社交应用组件中的信息分享...
How to list of all the tables defined for the database when using active record?
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An update for Rails 5.2
For Rails 5.2 you can also use ApplicationRecord to get an Array with your table' names. Just, as imechemi mentioned, be aware that this method will also return ar_internal_metadata and schema_migrations in that array.
ApplicationRecord.connection.tables
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How can I programmatically check whether a keyboard is present in iOS app?
I need to check the condition of keyboard visibility in my iOS app.
20 Answers
20
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cancelling a handler.postdelayed process
...dler.postDelayed() to create a waiting period before the next stage of my app takes place. During the wait period I am displaying a dialog with progress bar and cancel button.
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Converting string from snake_case to CamelCase in Ruby
...o get an actual class, you should use String#constantize on top of that.
"app_user".camelize.constantize
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How to select an element by classname using jqLite?
I'm trying to remove jquery from my Angular.js app in order to make it lighter, and put Angular's jqLite instead. But the app makes heavy use of find('#id') and find ('.classname'), which are not supported by jqLite, only 'tag names' (as per documentation)
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How to install Homebrew on OS X?
... brew install wget is an example of how to use Homebrew to install another application (in this case, wget) after brew is already installed.
Edit:
Above command to install the Brew is migrated to:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
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How do I add custom field to Python log format string?
... to pass the extra info with every logging call:
import logging
extra = {'app_name':'Super App'}
logger = logging.getLogger(__name__)
syslog = logging.StreamHandler()
formatter = logging.Formatter('%(asctime)s %(app_name)s : %(message)s')
syslog.setFormatter(formatter)
logger.setLevel(logging.INFO...
Execution failed app:processDebugResources Android Studio
...:
buildToolsVersion "21.0.1"
You will find this setting inside the file app/build.gradle.
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