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Collection was modified; enumeration operation may not execute
...irectly changing the subscribers dictionary under the hood during the loop and leading to that message. You can verify this by changing
foreach(Subscriber s in subscribers.Values)
To
foreach(Subscriber s in subscribers.Values.ToList())
If I'm right, the problem will disappear.
Calling subscribers...
Original purpose of ? [closed]
...lude such a description):
type=hidden
These fields should not be rendered and provide a means for servers to store state information with a form. This will be passed back to the server when the form is submitted, using the name/value pair defined by the corresponding attributes. This is a work arou...
What is the difference between pull and clone in git?
What is the difference between doing (after mkdir repo and cd repo ):
11 Answers
11...
'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine
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I downloaded these components and they did not work for me, I had to download the Microsoft Access Database Engine 2010 Redistributable from here: microsoft.com/en-in/download/details.aspx?id=13255 I'm sure that's because I'm using MS Office 2013. Thanks ...
Is a URL allowed to contain a space?
...he space
character is unsafe because significant spaces may disappear and
insignificant spaces may be introduced when URLs are transcribed or
typeset or subjected to the treatment of word-processing programs.
The characters "<" and ">" are unsafe because they are used as th...
How to uninstall Python 2.7 on a Mac OS X 10.6.4?
...bash_profile . But I also want to remove all directories, files, symlinks, and entries that got installed by the Python 2.7 install package. I've got the install package from http://www.python.org/ . What directories/files/configuration file entries do I need to remove? Is there a list somewhere?
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Java current machine name and logged in user?
...it possible to get the name of the currently logged in user (Windows/Unix) and the hostname of the machine?
4 Answers
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How to trigger a file download when clicking an HTML button or JavaScript
This is crazy but I don't know how to do this, and because of how common the words are, it's hard to find what I need on search engines. I'm thinking this should be an easy one to answer.
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Laravel blank white screen
My laravel site was working before, I recently upgraded to Apache 2.4 and PHP 5.5.7.
31 Answers
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Are there any naming convention guidelines for REST APIs? [closed]
When creating REST APIs, are there any guidelines or defacto standards for naming conventions within the API (eg: URL endpoint path components, querystring parameters)? Are camel caps the norm, or underscores? others?
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