大约有 48,000 项符合查询结果（耗时：0.0602秒） [XML]
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
...is will throw a NullReferenceException in the second line and you want to know why .NET doesn't tell you that it was s that was null when the exception was thrown.
To understand why you don't get that piece of information you should remember that it is not C# source that executes but rather IL:
I...
iPhone app in landscape mode, 2008 systems
Please note that this question is from 2008 and now is of only historic interest.
8 Answers
...
Remove background drawable programmatically in Android
...
setBackgroundDrawable is now deprecated. @Suraj's answer below is better now.
– Anand Sainath
Feb 17 '13 at 11:19
6
...
How to find/identify large commits in git history?
...post's script worked, I found it painfully slow. So I rewrote it, and it's now significantly faster on large repositories. Have a look: gist.github.com/nk9/b150542ef72abc7974cb
– Nick K9
Jun 23 '14 at 19:46
...
How to fix the uninitialized constant Rake::DSL problem on Heroku?
...
Thank you. That fixed my problems and I didn't know what was going on. (Using the rails installer on windows and deploying to heroku, as a complete beginner.)
– Jack V.
Jun 14 '11 at 22:46
...
“Deprecation warning: moment construction falls back to js Date” when trying to convert RFC2822 date
...r date string:
moment('2014-04-23T09:54:51');
Pass in the string you have now, but tell Moment what format the string is in:
moment('Wed, 23 Apr 2014 09:54:51 +0000', 'ddd, DD MMM YYYY HH:mm:ss ZZ');
Convert your string to a JavaScript Date object and then pass that into Moment:
moment(new Date('...
How to reference style attributes from a drawable?
...possible to live without if you have multiple themes within an app. Right now I have to make three drawable XMLs for each of custom button types!
– Stephan Henningsen
Oct 27 '16 at 10:52
...
Designer Added then removed by Visual Studio on load/unload
...ject. There is only one class defined in StoredImageControl.cs . Anyone know how to shut this off as it is really messing up my revision control.
...
Learning Ruby on Rails
As it stands now, I'm a Java and C# developer. The more and more I look at Ruby on Rails, the more I really want to learn it.
...
Creating range in JavaScript - strange syntax
...appens when you try to access a non-existent property? You get undefined.
Now we can lift our heads a little, and see why functions like arr.map don't walk over these properties. If arr[3] was merely undefined, and the key existed, all these array functions would just go over it like any other valu...