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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I enabled the user auth module in Django, but when I use UserCreationForm he ask me only username and the two password/password confirmation fields. I want also email and fullname fields, and set to required fields. I've done this: from django.contrib.auth.forms import UserCreationForm from django import forms from django.contrib.auth.models import User class RegisterForm(UserCreationForm): email = forms.EmailField(label = "Email") fullname = forms.CharField(label = "Full name") class Meta: model = User fields = ("username", "fullname",

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have created a migration using the Add-Migration command, but I'd like to change the name of that migration. How can I undo the migration command, so that I can regenerate it using the new desired name? Is it just a matter of deleting the generated files, or this could be a bad idea? 回答1: If you haven't used Update-Database you can just delete it. If you've run the update then roll it back using Update-Database -TargetMigration "NameOfPreviousMigration" , then delete it. Reference: http://elegantcode.com/2012/04/12/entity-framework

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have one matrix like below- A=[1 1 1 1 1; 0 1 1 1 2; 0 0 1 1 3] But I want to place all the 0 at the end of the row, so A should be like- A=[1 1 1 1 1; 1 1 1 2 0; 1 1 3 0 0] How can I do this? Matlab experts please help me. 回答1: There you go. Whole matrix, no loops, works even for non-contiguous zeros: A = [1 1 1 1 1; 0 1 1 1 2; 0 0 1 1 3]; At = A.'; %// It's easier to work with the transpose [~, rows] = sort(At~=0,'descend'); %// This is the important part. %// It sends the zeros to the end of each column cols = repmat(1:size(At,2),size

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have an excel sheet in which I need to find the last non empty cell in a specific column. How do I do this? The below will select this for me, but it will select the first not empty cell, I need the last not empty cell in the row. Worksheets("DTCs").Range("A29").End(xlToRight).Select 回答1: I think it might work just search from the other direction, so something like: Worksheets("DTCs").Range("IV29").End(xlToLeft).Select Though maybe the IV would need to be changed to something else depending on the version of Excel (this seems to work in

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: How do I get the last segment of a url? I have the following script which displays the full url of the anchor tag clicked: $(".tag_name_goes_here").live('click', function(event) { event.preventDefault(); alert($(this).attr("href")); }); If the url is http://mywebsite/folder/file how do I only get it to display the "file" part of the url in the alert box? 回答1: You can also use the lastIndexOf() function to locate the last occurrence of the / character in your URL, then the substr() function to return the substring starting from that location:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Is there a Python script or tool available which can remove comments and docstrings from Python source? It should take care of cases like: """ aas """ def f (): m = { u 'x' : u 'y' } # faake docstring ;) if 1 : 'string' >> m if 2 : 'string' , m if 3 : 'string' > m So at last I have come up with a simple script, which uses the tokenize module and removes comment tokens. It seems to work pretty well, except that I am not able to remove docstrings in all cases. See if you can improve it to remove docstrings. import cStringIO import

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'd like to know what is the Windows API function (if any exists) that provides information about the last Windows reboot source. There are three main possible causes: The computer crashed on a blue screen A user or a program shutdown/restarted the computer A power lost The more details I can get the better. However, I need to know at least which reason it is from the main ones. I need to support Windows Vista and Windows 7. Answer: It seems that there is no direct API to get that information. Instead, we have to harvest the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a textarea and a button on a form. The textarea may already have some text in it. I would like the cursor to move to the last position in the text area when the button is clicked. Is this possible? 回答1: By “the last position”, do you mean the end of the text? Changing the ‘.value’ of a form field will move the cursor to the end in every browser except IE. With IE you have to get your hands dirty and deliberately manipulate the selection, using non-standard interfaces: if (browserIsIE) { var range= element.createTextRange(); range

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Is it possible to have a table with width 100% (so the table fits the screen size), where the first and the last column have a fixed width, and the columns between take the rest, both 50%. Like: +--------------------+--------------------------------------+--------------------------------------+------------+ | width:300px; | with dynamic, equals next column | width dynamic, equals prevous column | width:50px;| +--------------------+--------------------------------------+--------------------------------------+------------+ +-------------------

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: This code can be used to select the first ten records from a table in mysql. How can I do the same to display last ten records from a table which has 1000 records. I want to display the name in asc order dont want to change that. SELECT name, cost FROM test orderby name asc LIMIT 10 ; 回答1: SELECT q.name, q.cost FROM (SELECT name, cost FROM test ORDER BY name DESC LIMIT 10) q ORDER BY q.name ASC; 回答2: The LIMIT clause can take two parameters, which will provide an offset: The LIMIT clause can be used to constrain the number of rows returned