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Numbering rows within groups in a data frame
... It might be worth mentioning that ave gives a float instead of an int here. Alternately, could change df$val to seq_len(nrow(df)). I just ran into this over here: stackoverflow.com/questions/42796857/…
– Frank
Mar 14 '17 at 22:07
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What does .class mean in Java?
...at does .class mean in Java? For example, if I created a class called Print . What does Print.class return?
7 Answers
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Get the new record primary key ID from MySQL insert query?
... document (Code, Title, Body)
VALUES (
sha1( concat (convert ( now() , char), ' ', getAutoincrementalNextval ('document') ) ),
'Title',
'Body'
);
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Deprecated: mysql_connect()
... will be removed in the future.
Use mysqli_* function or pdo
Read Oracle Converting to MySQLi
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Correctly determine if date string is a valid date in that format
... that this won't work with a British (d/m/Y) format as it will assume it's converting the American (m/d/Y). It will seem to work only if the day is lower than 12!
– Sylvester Saracevas
May 1 '18 at 12:58
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How to start a Process as administrator mode in C# [duplicate]
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Assuming your password is password, you can do for (int x = 0; x < password.Length; x++) { pass.AppendChar(password[x]); }
– Mark Richman
Jun 10 '16 at 15:23
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What's the role of adapters in Android?
...ou can populate your ListViews by using an Android adapter.
Adapter is an interface whose implementations provide data and control the display of that data.
ListViews own adapters that completely control the ListView’s
display.
So adapters control the content displayed in the list as well as how ...
Passing a string with spaces as a function argument in bash
...-split and then individually glob-expanded, so if you have tabs they'll be converted to spaces, if you have words that can be evaluated as glob expressions they will be, etc.
– Charles Duffy
Mar 29 '18 at 20:45
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Opening project in Visual Studio fails due to nuget.targets not found error
...uested a migration tool to disable the
MSBuild-based package restore and convert to Automatic Package
Restore. The NuGet team has decided not to provide a supported tool
for this because of the high probability of edge cases that would be
unhandled. However, Owen Johnson has authored a Power...
clearing a char array c
...\0' is equal to 0 (in ascii) but you should use '\0' because it makes your intention clear
– Mark Testa
Mar 11 '09 at 2:23
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