compatibility

<button> vs. <input type=“button” />. Which to use?

由 我们两清 提交于 2019-11-25 21:53:21
问题 When looking at most sites (including SO), most of them use: <input type=\"button\" /> instead of: <button></button> What are the main differences between the two, if any? Are there valid reasons to use one instead of the other? Are there valid reasons to use combine them? Does using <button> come with compatibility issues, seeing it is not very widely used? 回答1: Here's a page describing the differences (basically you can put html into a <button></button> ) And another page describing why

Java 32-bit vs 64-bit compatibility

由 杀马特。学长 韩版系。学妹 提交于 2019-11-25 21:29:56
Will Java code built and compiled against a 32-bit JDK into 32-bit byte code work in a 64-bit JVM? Or does a 64-bit JVM require 64-bit byte code? To give a little more detail, I have code that was working in a Solaris environment running a 32-bit JVM, but now I'm getting issues after upgrading the JDK and Weblogic Server to 64-bit. Yes, Java bytecode (and source code) is platform independent, assuming you use platform independent libraries. 32 vs. 64 bit shouldn't matter. I accidentally ran our (largeish) application on a 64bit VM rather than a 32bit VM and didn't notice until some external

How to run multiple Python versions on Windows

由 泪湿孤枕 提交于 2019-11-25 20:22:00
I had two versions of Python installed on my machine (versions 2.6 and 2.5). I want to run 2.6 for one project and 2.5 for another. How can I specify which I want to use? I am working on Windows XP SP2. Running a different copy of Python is as easy as starting the correct executable. You mention that you've started a python instance, from the command line, by simply typing python . What this does under Windows, is to trawl the %PATH% environment variable, checking for an executable, either batch file (.bat), command file (.cmd) or some other executable to run, that matches the name given. When

How to install both Python 2.x and Python 3.x in Windows 7

由 僤鯓⒐⒋嵵緔 提交于 2019-11-25 20:09:54
I do most of my programming in Python 3.x on Windows 7, but now I need to use the Python Imaging Library (PIL), ImageMagick, and wxPython, all of which require Python 2.x. Can I have both Python 2.x and Python 3.x installed in Windows 7? When I run a script, how would I "choose" which version of Python should run it? Will the aforementioned programs be able to handle multiple versions of Python installed at once? I have searched for hours and hours for how to do this to no avail. Thanks. I found that the formal way to do this is as follows: Just install two (or more, using their installers)

How To Make iPhone App compatible with multiple SDK (firmware) versions

由 五迷三道 提交于 2019-11-25 18:45:21
With iOS4 coming out soon, I have already planned to include an iAd in a future update of an app of mine. I assume that this will make my app unusable for anyone on a firmware lower than 4.0. Is there a way to change that variables and the .xib file based on the user's firmware? Cheers. progrmr Yes, you can build with the latest SDK (ie: 5.1) and still run on devices with earlier versions of the firmware (SDK). Set your Deployment Target to the earliest version you want to be able to run with, ie: 3.0. You set your Base SDK to the latest version that you are compiling with, ie: 5.0. This way
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