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Entity Framework: There is already an open DataReader associated with this Command
...tion is to allow multiple nested DataReaders = turn on MultipleActiveResultSets. Another scenario when this always happens is when you iterate through result of the query (IQueryable) and you will trigger lazy loading for loaded entity inside the iteration.
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Is it safe to delete a void pointer?
Suppose I have the following code:
13 Answers
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How to check if a map contains a key in Go?
...e" (in this case the empty string) and ok will receive a bool that will be set to true if "foo" was actually present in the map
evaluates ok, which will be true if "foo" was in the map
If "foo" is indeed present in the map, the body of the if statement will be executed and val will be local to tha...
Programmer Puzzle: Encoding a chess board state throughout a game
.... Chess occurs on an 8x8 board with each player starting with an identical set of 16 pieces consisting of 8 pawns, 2 rooks, 2 knights, 2 bishops, 1 queen and 1 king as illustrated here:
Positions are generally recorded as a letter for the column followed by the number for the row so White’s que...
micro:bit 微控制器教程 · App Inventor 2 中文网
...navbar .nav-link .mdi, .navbar .dropdown-item .mdi { margin-right: 6px; opacity: .7; } 创建 Apps 文档 文档首页 内置块参考文档 组件参考文档 拓展参考文档 概念参考文档 IoT 参考文档 技术和其他指南...
What are the dark corners of Vim your mom never told you about? [closed]
There are a plethora of questions where people talk about common tricks, notably " Vim+ctags tips and tricks ".
70 Answers
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How to set UITextField height?
... I would recommend against hacking in the storyboard source, it tends to reset some of it's values. For example, when you set the textfield height like that, and you add a button to the view and edit the button's text size the textfields in the view will jump back to their default height.
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What is the difference between Θ(n) and O(n)?
...the middle of it, and sometimes just O(n). Is it just laziness of typing because nobody knows how to type this symbol, or does it mean something different?
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JSON Naming Convention (snake_case, camelCase or PascalCase) [closed]
Is there a standard on JSON naming? I see most examples using all lower case separated by underscore, aka snake_case , but can it be used PascalCase or camelCase as well?
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Set focus on textbox in WPF
How to set the focus on an TextBox element in WPF
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