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Are there any disadvantages to always using nvarchar(MAX)?
...disadvantages to making all character fields nvarchar(MAX) rather than specifying a length explicitly, e.g. nvarchar(255)? (Apart from the obvious one that you aren't able to limit the field length at the database level)
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How do I enable/disable log levels in Android?
...LOGLEVEL > 1;
...
public static boolean VERBOSE = LOGLEVEL > 4;
if (VERBOSE) Log.v(TAG, "Message here"); // Won't be shown
if (WARN) Log.w(TAG, "WARNING HERE"); // Still goes through
Later, you can just change the LOGLEVEL for all debug output level.
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Shell equality operators (=, ==, -eq)
Can someone please explain the difference between = , == and -eq in shell scripting?
4 Answers
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...对象：
如果容器是vector、string或deque，则使用erase-remove_if习惯用法。
如果容器是list，则使用list::remove_if。
如果容器是一个标准关联容器，则使用remove_copy_if和swap，或者写一个循环遍历容器的元素，记住当把迭代器传给erase时...
Why is it important to override GetHashCode when Equals method is overridden?
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Yes, it is important if your item will be used as a key in a dictionary, or HashSet<T>, etc - since this is used (in the absence of a custom IEqualityComparer<T>) to group items into buckets. If the hash-code for two items does not ma...
Max return value if empty query
... .Select(x => x.ShoeSize)
.DefaultIfEmpty(0)
.Max();
The zero in DefaultIfEmpty is not necessary.
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Is duplicated code more tolerable in unit tests?
...eems there is a trade-off between tests' readability and maintainability. If I leave duplicated code in unit tests, they're more readable, but then if I change the SUT , I'll have to track down and change each copy of the duplicated code.
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Why do you need to put #!/bin/bash at the beginning of a script file?
...helps some editors like Vim determine the language for syntax highlighting if the file doesn't have an extension. Without the shebang, Vim will display a bash script the same as plain text file.
– Aaron Blenkush
Dec 10 '13 at 21:16
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How do I size a UITextView to its content?
..., fixedWidth), newSize.height);
textView.frame = newFrame;
}
Or in Swift (Works with Swift 4.1 in iOS 11)
let fixedWidth = textView.frame.size.width
let newSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat.greatestFiniteMagnitude))
textView.frame.size = CGSize(width: max(...
Location Services not working in iOS 8
...my Info.plist. I added it and still it does not seem to work. I am using Swift, iOS8 and XCode 6 beta 4
– A B Vijay Kumar
Aug 3 '14 at 4:06
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