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What are the effects of exceptions on performance in Java?
Question: Is exception handling in Java actually slow?
18 Answers
18
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Can constructors be async?
...onstructor acts very similarly to a method returning the constructed type. And async method can't return just any type, it has to be either “fire and forget” void, or Task.
If the constructor of type T actually returned Task<T>, that would be very confusing, I think.
If the async constru...
Is the != check thread safe?
... edited Apr 15 '16 at 12:57
Andrew Tobilko
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answered Aug 27 '13 at 8:35
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Android: checkbox listener
I want to put a Listener over a CheckBox . I looked for info and it is like this:
10 Answers
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How to remove first 10 characters from a string?
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And for better readability, you can use "". It compiles exactly the same as string.Empty these days.
– PRMan
Oct 15 '19 at 20:46
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How to use ArrayAdapter
I have created row.xml in layouts, but don't know how to show both reason and long_val in the ListView using ArrayAdapter.
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Why Doesn't C# Allow Static Methods to Implement an Interface?
...property, which would still allow it to be accessed from a static context, and return that value in the implementation.
public class Animal: IListItem {
/* Can be tough to come up with a different, yet meaningful name!
* A different casing convention, like Java has, would help here.
*...
Sending POST data in Android
I'm experienced with PHP, JavaScript and a lot of other scripting languages, but I don't have a lot of experience with Java or Android.
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How to append rows to an R data frame
...m:
You should use stringsAsFactors if you want the characters to not get converted to factors. Use: df = data.frame(x = numeric(), y = character(), stringsAsFactors = FALSE)
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Retrieving the last record in each group - MySQL
...dowing functions, like almost all popular SQL implementations. With this standard syntax, we can write greatest-n-per-group queries:
WITH ranked_messages AS (
SELECT m.*, ROW_NUMBER() OVER (PARTITION BY name ORDER BY id DESC) AS rn
FROM messages AS m
)
SELECT * FROM ranked_messages WHERE rn = 1...