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onceupon 2017-09-15 11:07:16 +08:00 committed by GitHub
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@ -370,7 +370,7 @@ awk '$1~/,/ {print}'
##### Split and do for loop ##### Split and do for loop
```bash ```bash
awk '{split($2, a,",");for (i in a) print $1"\t"a[i]} filename awk '{split($2, a,",");for (i in a) print $1"\t"a[i]}' filename
``` ```
##### Print all lines before nth occurence of a string (e.g stop print lines when bbo appears 7 times) ##### Print all lines before nth occurence of a string (e.g stop print lines when bbo appears 7 times)
@ -381,7 +381,7 @@ awk -v N=7 '{print}/bbo/&& --N<=0 {exit}'
##### Print filename and last line of all files in directory ##### Print filename and last line of all files in directory
```bash ```bash
ls|xargs -n1 -I file awk '{s=$0};END{print FILENAME,s}' file' ls|xargs -n1 -I file awk '{s=$0};END{print FILENAME,s}' file
``` ```
##### Add string to the beginning of a column (e.g add "chr" to column $3) ##### Add string to the beginning of a column (e.g add "chr" to column $3)