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Collection was modified; enumeration operation may not execute
I can't get to the bottom of this error, because when the debugger is attached, it does not seem to occur.
15 Answers
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Why historically do people use 255 not 256 for database field magnitudes?
You often see database fields set to have a magnitude of 255 characters, what is the traditional / historic reason why? I assume it's something to do with paging / memory limits, and performance but the distinction between 255 and 256 has always confused me.
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What is the difference between static func and class func in Swift?
...atic func myFunc() instead of class func myFunc you will get the following error l: cannot override static method. Why? Because it's as if its been marked with final. For more information. See nextD's answer below. Also x.dynamicType has now been replaced with type(of:x)
– Hone...
JFrame in full screen Java
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I will tell you the error and reason. I created one AppFrame class (with some default properties) and in order to make any class as JFrame I simply extend it. It has setVisible as true. Now above three lines has to be in same order, if visibl...
Using wget to recursively fetch a directory with arbitrary files in it
I have a web directory where I store some config files. I'd like to use wget to pull those files down and maintain their current structure. For instance, the remote directory looks like:
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Finding Key associated with max Value in a Java Map
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– Alexey Grigorev
Feb 15 '17 at 22:05
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List of zeros in python [duplicate]
How can I create a list which contains only zeros? I want to be able to create a zeros list for each int in range(10)
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Write to UTF-8 file in Python
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I'm getting "TypeError: an integer is required (got type str)". I don't understand what we're doing here. Can someone please help? I need to append a string (paragraph) to a text file. Do I need to convert that into an integer first before wr...
How to pass a user defined argument in scrapy spider
...able to access it outside the __init__ method. Python throws a not defined error. BTW, why have you omitted the super call? PS. I'm working with the CrawlSpider class
– Birla
Sep 24 '14 at 10:57
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What IDE to use for Python? [closed]
...ce Control Integration -. | | | | .- Code Folding
Error Markup -. | | | | | | .- Code Templates
Integrated Python Debugging -. | | | | | | | | .- Unit Testing
Multi-Language Support -. | | | | | | | | | | .- GUI Designer (Qt, Eric, etc)
Au...