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What does .class mean in Java?
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And how does Android handle new Intent(this, Activity.class? Will it try to find out class Activity by comparing each class?
– Zhipeng YANG
Sep 21 '16 at 13:28
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Command prompt won't change directory to another drive
...are enabled CHDIR changes as follows:
The current directory string is converted to use the same case as
the on disk names. So CD C:\TEMP would actually set the current
directory to C:\Temp if that is the case on disk.
CHDIR command does not treat spaces as delimiters, so it is possibl...
Is there a way to take a screenshot using Java and save it to some sort of image?
Simple as the title states: Can you use only Java commands to take a screenshot and save it? Or, do I need to use an OS specific program to take the screenshot and then grab it off the clipboard?
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Trimming a huge (3.5 GB) csv file to read into R
So I've got a data file (semicolon separated) that has a lot of detail and incomplete rows (leading Access and SQL to choke). It's county level data set broken into segments, sub-segments, and sub-sub-segments (for a total of ~200 factors) for 40 years. In short, it's huge, and it's not going to fit...
Group query results by month and year in postgresql
...request of Radu, I will explain that query:
to_char(date,'Mon') as mon, : converts the "date" attribute into the defined format of the short form of month.
extract(year from date) as yyyy : Postgresql's "extract" function is used to extract the YYYY year from the "date" attribute.
sum("Sales") as...
How to run a method every X seconds
I'm developing an Android 2.3.3 application and I need to run a method every X seconds .
8 Answers
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What does this symbol mean in JavaScript?
This is a collection of questions that come up every now and then about syntax in JavaScript. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
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Why are mutable structs “evil”?
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So if you change a copy you are changing only that copy, not the original and not any other copies which might be around.
If your struct is immutable then all automatic copies resulting from being passed by value will be the same.
If you want to change it you have to consciously do it by creating...
Gitignore not working
...ce indicator at bottom right showing type of line endings. It was LF so I converted to CRLF as suggested but no dice.
Then I looked next to the line endings and noticed it was saved using UTF16. So I resaved using UTF8 encoding an voila, it worked. I didn't think the CRLF mattered so I changed i...
How can I remove all text after a character in bash?
...rrectly, this would work:
echo "Hello: world" | cut -f1 -d":"
This will convert "hello: world" into "hello".
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