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Why do I have to access template base class members through the this pointer?
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使用Activity启动器组件 · App Inventor 2 中文网
... HelloPurr 完成时（如果完成），将调用原始应用程序的 AfterActivity 方法。
如果你要启动另一个 App Inventor 应用程序，请确保使用正确的包名称。 例如，如果有人发布某个应用程序的源代码（aia 文件），并且你重新打包该应用程...
Nodejs - Redirect url
.... In the same request you must generate the response with the status code set to 404 and the content of your 404 HTML page as response body. Here is the sample code to demonstrate this in Node.js.
var http = require('http'),
fs = require('fs'),
util = require('util'),
url = require('u...
How to filter SQL results in a has-many-through relation
...ment for this test:
PostgreSQL 9.0 on Debian Squeeze with decent RAM and settings.
6.000 students, 24.000 club memberships (data copied from a similar database with real life data.)
Slight diversion from the naming schema in the question: student.id is student.stud_id and club.id is club.club_id h...
使用App Inventor扩展实现多点触控：Scale Detector · App Inventor 2 中文网
...还有 Canvas1，其中包含 Ball1 精灵和 Label1。
使用数字 scaleFactor 调用 ScaleDetector1.Scale 事件处理程序。 当 scaleFactor 大于 1 时，表示手指正在分开。 在这种情况下，程序将球的半径增加 3，最多为画布宽度的一半。 当 scaleFactor 小于...
SQL join: selecting the last records in a one-to-many relationship
...f there‘s a row with a higher id. You’ll only get a row in your result set, if none with higher id is found. That should be the unique highest one.
– Stefan Haberl
Nov 13 '17 at 0:30
...
Pry: show me the stack
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How can I git stash a specific file?
....
git add app/controllers/cart_controller.php
git stash --keep-index
git reset
Last step is optional, but usually you want it. It removes changes from index.
Warning
As noted in the comments, this puts everything into the stash, both staged and unstaged. The --keep-index just leaves the index alo...
How can I use getSystemService in a non-activity class (LocationManager)?
... savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
fyl lfyl = new fyl(this); //Here the context is passing
Location location = lfyl.getLocation();
String latLongString = lfyl.updateWithNewLocation(location);
T...
Regular expression for matching HH:MM time format
I want a regexp for matching time in HH:MM format. Here's what I have, and it works:
19 Answers
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