在å‚考this question时,最佳ç”案æä¾›äº†ä¸€ä¸ªæ›´æ”¹åˆ—è¡¨å…ƒç´ çš„è§£å†³æ–¹æ¡ˆã€‚æˆ‘æƒ³çŸ¥é“是å¦æœ‰åŠžæ³•é‡å‘½å列表"å称"在他们已ç»å®šä¹‰ä¹‹åŽã€‚举个å°ä¾‹å:
for i in $(git status -s | awk '{print $2}'); do
open=$(fgrep -o { $i | wc -l); # count number of opening braces
close=$(fgrep -o } $i | wc -l); # count number of closing braces
diff=$((open-close)); # find difference
echo "$diff : $i"; # print difference for filename
done
如何在æ¤å¤„é‡å‘½å> a <- list(1, 2, 3)
> names(a) <- c('A','B',"C")
> a
$A
[1] 1
$B
[1] 2
$C
[1] 3
> names(a[1]) <- 'D' #does not work
> a
$A
[1] "test1"
$B
[1] "test2"
$C
[1] "test3"
?