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List tables in a PostgreSQL schema
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You can select the tables from information_schema
SELECT * FROM information_schema.tables
WHERE table_schema = 'public'
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How do I delete NuGet packages that are not referenced by any project in my solution?
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First open the Package Manager Console. Then select your project from the dropdown list. And run the following commands for uninstalling nuget packages.
Get-Package
for getting all the package you have installed.
and then
Uninstall-Package PagedList.Mvc
--- to unin...
How to clear variables in ipython?
...r @ErdemKAYA comment.
To erase a variable, use the magic command:
%reset_selective <regular_expression>
The variables that are erased from the namespace are the one matching the given <regular_expression>.
Therefore
%reset_selective -f a
will erase all the variables containing a...
How to find the size of an array in postgresql
...ikely) and are running PostgreSQL 9.4 or higher, you can use cardinality:
SELECT cardinality(id) FROM example;
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App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
来源：http://www.zsqz.com/chuangke/10r.htm
【学习目标】
1.掌握App Inventor中对调用手机计步器、位置传感器等硬件传感器的应用；
2.了解数据持久化，掌握数据存储等功能的实现；
3.通过编程实践，感受和体验利用手机...
Trim trailing spaces in Xcode
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You can create a script and bind it to a keyboard shortcut:
Select Scripts Menu > Edit User Scripts...
Press the + button and select New Shell Script
Give it a name like "Strip Trailing Spaces", and give it a shortcut like ⌃⇧R.
Set Input to "Selection" and Output to "Replace Se...
What is “android.R.layout.simple_list_item_1”?
...r the individual rows. There are others with checkedtextviews for multiple selections, you can make custom layouts that include images, and multiple textviews for example. These android.R ones are just some easy to use, already created resources for you.
– Kevin Coppock
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How do I limit the number of returned items?
...ojection] «Object|String» optional fields to return, see Query.prototype.select()
[options] «Object» optional see Query.prototype.setOptions()
[callback] «Function»
How to limit
const Post = require('./models/Post');
Post.find(
{ published: true },
null,
{ sort: { 'date': 'asc' }, ...
Count lines of code in all java classes in Android Studio
...all the latest version
To install
Run Android Studio
From the menu bar, select File-->Settings
Under IDE Settings, click Plugins, and then click Install plugin from disk
Navigate to the folder where you downloaded the plugin and double-click it
Restart Android Studio
To count the lines
Che...
Apache Tomcat Not Showing in Eclipse Server Runtime Environments
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For version 2019-09, in drop down select: 2019-09 - download.eclipse.org/releases/2019-09 and install both: JST Server Adapters and JST Server Adapters extensions
– Olivier Royo
Nov 14 '19 at 8:07
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