Dynamically modify values in data.table in R but getting only single constant value returned
Date : March 29 2020, 07:55 AM
I wish did fix the issue. You are doing it very inefficiently. This is not how you should work with data.table. Here's one efficient way to solve this (there are probably more efficient ways) setkey(TableB[, indx := as.Date(ISOdate(ColBD, ColBC, ColBB))], indx)
setkey(TableA[, indx := as.Date(ColC)], indx)
TableA[TableB, ColA := ColBA][, indx := NULL][]
# ColA ColB ColC
# 1: 600 93 2012-12-14 23:45:00
# 2: 600 93 2012-12-14 23:45:00
# 3: 600 93 2012-12-14 23:45:00
# 4: 600 93 2012-12-14 23:45:00
# 5: 600 93 2012-12-14 23:45:00
# 6: 601 93 2012-12-15 23:45:00
# 7: 601 93 2012-12-15 23:45:00
# 8: 601 93 2012-12-15 23:45:00
# 9: 601 93 2012-12-15 23:45:00
# 10: 601 93 2012-12-15 23:45:00
setkey(TableB[, indx := as.Date(ISOdate(ColBD, ColBC, ColBB))], indx)
setkey(TableA[, `:=`(indx = as.Date(ColC), order = .I)], indx)
setorder(TableA[TableB, ColA := ColBA], order)[, `:=`(indx = NULL, order = NULL)][]
# ColA ColB ColC
# 1: 600 93 2012-12-14 23:45:00
# 2: 601 93 2012-12-15 23:45:00
# 3: 600 93 2012-12-14 23:45:00
# 4: 601 93 2012-12-15 23:45:00
# 5: 600 93 2012-12-14 23:45:00
# 6: 601 93 2012-12-15 23:45:00
# 7: 600 93 2012-12-14 23:45:00
# 8: 601 93 2012-12-15 23:45:00
# 9: 600 93 2012-12-14 23:45:00
# 10: 601 93 2012-12-15 23:45:00
|
How to define a constant record containing other constant records in Delphi? Specific case: matrix using vectors
Tag : delphi , By : Thierry Brunet
Date : March 29 2020, 07:55 AM
Does that help That's not possible. In a constant record declaration, the member values must be constant expressions. That is, you cannot use typed constants as you have attempted to do. The documentation says it like this, with my emphasis: const
identity: TMatrix3D = (Index:
((x: 1; y: 0; z: 0),
(x: 0; y: 1; z: 0),
(x: 0; y: 0; z: 1))
);
|
Query returned non-zero code: 1, cause: hive configuration hive.root.logger does not exists
Date : March 29 2020, 07:55 AM
This might help you The problem was a file in ~/.hiverc with this command: SET hive.root.logget=DEBUG. Remove that line, and Hive runs without a problem.
|
Dynamically create multiple DataTables based on number of records returned from SQL query in C#?
Tag : chash , By : fedorafennec
Date : March 29 2020, 07:55 AM
|
Why can a volatile type be constant when returned by a constant functions?
Date : March 29 2020, 07:55 AM
|