АК
Size: a a a
АК
PU
АК
АК
col_a
- список (например, после strsplit
), то DT[, .(col_a = rep(col_a, lengths(col_b)), col_b = unlist(col_b))]работает на порядок быстрее, чем
DT[, .(col_b = unlist(col_b)), by = .(col_a)]при идентичном результате.
unnest
в tidyverse
, если кто не в теме.ВК
ВК
ВК
Ю
ВК
Ю
PU
pandoc: internal error: Unable to commit 1048576 bytes of memory
(GHC version 8.4.3 for x86_64_alpine_linux)
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Aborted
Error: pandoc document conversion failed with error 134
Execution halted
ERROR: Job failed: exit code 1
PU
a
Ю
pandoc: internal error: Unable to commit 1048576 bytes of memory
(GHC version 8.4.3 for x86_64_alpine_linux)
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Aborted
Error: pandoc document conversion failed with error 134
Execution halted
ERROR: Job failed: exit code 1
A
pandoc: internal error: Unable to commit 1048576 bytes of memory
(GHC version 8.4.3 for x86_64_alpine_linux)
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Aborted
Error: pandoc document conversion failed with error 134
Execution halted
ERROR: Job failed: exit code 1
PU
PU
A