compatibility | 易学教程

Is .GetHashCode guaranteed to be the same across systems/platform versions? [duplicate]

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Possible Duplicate: Can I depend on the values of GetHashCode() to be consistent? If I use the Object.GetHashCode() method across two systems/framework versions, am I guaranteed to get the same value for the same input? In other words, does its value make a good key for persistent data? Note: I don't care about collisions in this problem. As a bonus, am I guaranteed to get the same value in Mono vs. Microsoft .Net? No. Other questions? :-) The algorithms used aren't published nor they are in the Ecma standard. I'll quote from the MSDN String.GetHashCode (I think that this example is good

Java SE 8: Would a Java 7 compiled JAR be compatible completely with Java 8?

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问题 I compiled my old JAR files in Java 7 and my production environment has Java 8. Is there anything I need to be careful about directly deploying the JAR files onto Java 8 Environment? I test ran them on Java 8 and it worked fine. Could I encounter any problems or should I be fine? I was wondering this because I was debating removing Java 8 and installing Java 7. EDIT: A side question: Do companies update their code when they update their Java version? I can't imagine how painful this must be

ActiveX Calendar Control Not Working In Windows 7

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We have a classic ASP application that uses the following calendar object: <HTML> <BODY bgcolor="lightgrey"> <OBJECT id=Calendar1 style="LEFT: 0px; TOP: 0px" classid="clsid:8E27C92B-1264-101C-8A2F-040224009C02" VIEWASTEXT> <PARAM NAME="_Version" VALUE="524288"> <PARAM NAME="_ExtentX" VALUE="7620"> <PARAM NAME="_ExtentY" VALUE="5080"> <PARAM NAME="_StockProps" VALUE="1"> <PARAM NAME="BackColor" VALUE="-2147483633"> <PARAM NAME="Year" VALUE="2002"> <PARAM NAME="Month" VALUE="10"> <PARAM NAME="Day" VALUE="29"> <PARAM NAME="DayLength" VALUE="1"> <PARAM NAME="MonthLength" VALUE="2"> <PARAM NAME=

What version of HTML to use in emails?

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问题 What version of html would yo recommend for mail content to get best mail-client compatibility? HTML 3.2 HTML 4.01 transitional HTML 4.01 strict XHTML 1.0 XHTML 2.0 HTML 5 What would you recommend me to use? BR Andreas 回答1: If you thought browser-html was fragmented, you're going to pull your hair out with email-html. You often don't have the luxury of providing a doctype (to distinguish between transitional/strict, etc)... even if you provide one a lot of clients will ignore it. This gets

jquery 1.4.2 working for iCheckBox and not jquery 1.6

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I am using this jquery plugin for Apple like checkbox button. However when I use jquery version 1.4.2 it works perfectly but when I try to use jquery version 1.6. that plugin doesn't work. I tried debugging javascript using IE9 developer toolbar but it is not throwing any error. Thank you. mikkelbreum EDIT: got it working in FF4 as well now, see this: jQuery 1.6: backgroundPosition vs backgroundPositionX and FF4 compatibility Got it working with jQuery 1.6.x and 1.5.x (in Safari and Chrome on Mac, not working in FF4/Mac) There were two problems with the original code, one making it

Is there any way to apply CSS for specific chrome version?

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I'm facing a problem in Chrome 59 version alone . to sort that I need a css hack to target that chrome version alone. I saw an article with this example code says its working, but in my case it doesn't work. example 1 @media screen and (-webkit-min-device-pixel-ratio:0) { .logotext-n { .chrome59.margin-left: -10px; /* update for Chrome 59 issue */ } } example 2 @media screen and (-webkit-min-device-pixel-ratio:0) { .chrome59.logotext-n { margin-left: -10px; /* update for Chrome 59 issue */ } } both the examples doesn't work. You should in principle always design for feature detection, not

How to give Internet Explorer different CSS lines?

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Imagine I'm having a DIV . I want to display it in a row with other divs, so I'm giving it display: inline-block along with other style definitions in a CSS sheet. Now Internet Explorer wants to have display: inline; for the behavior I want. How do I give Internet Explorer a seperate styling command to overwrite the definition for good browsers, so only IE will have display: inline; . Due to technical limitations I cannot use <![If IE] --> -stuff in HTML, I need to stay within the CSS file. Alex You can use selectors like so: \9 – IE8 and below, * – IE7 and below, _ – IE6 So in your case:

Sharing JS objects between HTML frames in IE8/IE9

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I have to bring support for IE8/IE9 to an application which was built specifically for IE6 and uses HTML frames (framesets) a lot. Application has a lot of JavaScript code where "navigator.PropertyABC" is used. Here "PropertyABC" is an object initialized in one of frames and used in many other frames. This worked in IE6 because "navigator" object seems to be shared in IE6 between all of the frames. It also works with IE7 compatibility mode. But it does not work in IE8/IE9. There are frames nested into other frames, so it's multi-level. Sample code: <html> <frameset rows="50%,50%"> <frame name=

What version of HTML to use in emails?

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What version of html would yo recommend for mail content to get best mail-client compatibility? HTML 3.2 HTML 4.01 transitional HTML 4.01 strict XHTML 1.0 XHTML 2.0 HTML 5 What would you recommend me to use? BR Andreas If you thought browser-html was fragmented, you're going to pull your hair out with email-html. You often don't have the luxury of providing a doctype (to distinguish between transitional/strict, etc)... even if you provide one a lot of clients will ignore it. This gets even more complicated when you have webmail viewers - those pages already have their own document type so they

Is it preferable to use future or future to write code compatible with python2 and python3?

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Or are there specific situations where one is better than the other? So far, all I gathered is that future is only available for >=2.6 or >=3.3. The current code I have is very basic and runs the same on python2 and 3 except for the use of print function calls. However, the code may get more complex over time and I would like to use the right approach for writing python2/3 compatible code from the beginning. The __future__ module is built-in to Python, and is provided to allow programmers to make advance use of feature sets which are not yet regarded as complete. Although some of the features