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What does value & 0xff do in Java?
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It sets result to the (unsigned) value resulting from putting the 8 bits of value in the lowest 8 bits of result.
The reason something like this is necessary is that byte is a signed type in Java. If you just wrote:
int result = value;
then result would end up with the value ff ff ff fe...
How to get terminal's Character Encoding
... change my gnome-terminal's character encoding to "GBK" (default it is UTF-8), but how can I get the value(character encoding) in my Linux?
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TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes
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From the documentation (MySQL 8) :
Type | Maximum length
-----------+-------------------------------------
TINYTEXT | 255 (2 8−1) bytes
TEXT | 65,535 (216−1) bytes = 64 KiB
MEDIUMTEXT | 16,777,215 (224−1) bytes = ...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
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89
This doesn't answer your question directly, but it will give you the elements that are in commo...
How to drop columns by name in a data frame
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389
You should use either indexing or the subset function. For example :
R> df <- data.frame...
pandas: filter rows of DataFrame with operator chaining
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398
I'm not entirely sure what you want, and your last line of code does not help either, but anyway...
How many bytes in a JavaScript string?
...vascript string which is about 500K when being sent from the server in UTF-8. How can I tell its size in JavaScript?
13 Ans...
What does this square bracket and parenthesis bracket notation mean [first1,last1)?
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answered Dec 9 '10 at 8:41
Michael MrozekMichael Mrozek
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How to delete last item in list?
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answered Aug 11 '13 at 8:10
sebastiansebastian
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Using awk to print all columns from the nth to the last
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edited Apr 8 '15 at 13:01
fedorqui 'SO stop harming'
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