大约有 35,100 项符合查询结果（耗时：0.0408秒） [XML]
How to manage startActivityForResult on Android?
...TIVITY);
In your SecondActivity set the data which you want to return back to FirstActivity. If you don't want to return back, don't set any.
For example: In SecondActivity if you want to send back data:
Intent returnIntent = new Intent();
returnIntent.putExtra("result",result);
setResult(Activi...
HSL to RGB color conversion
I am looking for a JavaScript / PHP algorithm to convert between HSL color to RGB.
19 Answers
...
Why are arrays covariant but generics are invariant?
...
Via wikipedia:
Early versions of Java and C# did not include generics (a.k.a. parametric polymorphism).
In such a setting, making arrays invariant rules out useful polymorphic programs.
For example, consider writing a fu...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
...the direction. It receives request from this elevator.
Then there is a bank. It contains the elevators and receives the requests from the floors. These are scheduled to all active elevators (not in maintenance).
The scheduling will be like:
if available pick a standing elevator for this floor.
e...
What is ActiveMQ used for - can we apply messaging concept using a Database?
I looked it up and it used to send messages between 2 systems.
But why? Why wouldn't you just use a Database ?
There must be some feature that ActiveMQ has that Databases do not?
...
What is an alternative to execfile in Python 3?
It seems they canceled in Python 3 all the easy way to quickly load a script by removing execfile()
12 Answers
...
Is it feasible to do (serious) web development in Lisp? [closed]
It obviously is possible to write almost any kind of application in almost any programming language, especially in such a powerful one as Lisp (be it Scheme or Common Lisp). But is it practical to use it for web development? If so, what should be a good starting point? Where can be found the proper ...
Merge PDF files
...ypdf or its successor PyPDF2:
A Pure-Python library built as a PDF toolkit. It is capable of:
* splitting documents page by page,
* merging documents page by page,
(and much more)
Here's a sample program that works with both versions.
#!/usr/bin/env python
import sys
try:
from PyPD...
How to Generate unique file names in C#
...age10.png") and if that fails (because the file already exists), I fall back to GUIDs.
Update:
Recently, I've also use DateTime.Now.Ticks instead of GUIDs:
var myUniqueFileName = string.Format(@"{0}.txt", DateTime.Now.Ticks);
or
var myUniqueFileName = $@"{DateTime.Now.Ticks}.txt";
The benefi...
Separating class code into a header and cpp file
...red Mar 6 '12 at 8:09
Ferenc DeakFerenc Deak
29.3k1313 gold badges8080 silver badges141141 bronze badges
...