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add awk

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onceupon 2016-09-05 15:37:30 +08:00 committed by GitHub
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commit b21244ca49
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@ -132,6 +132,11 @@ grep -o -w "\w\{10\}\-R\w\{1\}"
// \w word character [0-9a-zA-Z_] \W not word character // \w word character [0-9a-zA-Z_] \W not word character
#####a lot examples here
http://www.cyberciti.biz/faq/grep-regular-expressions/
##Sed ##Sed
[[back to top](#handy-bash-oneliner-commands-for-tsv-file-editing)] [[back to top](#handy-bash-oneliner-commands-for-tsv-file-editing)]
@ -458,12 +463,17 @@ detail here:　http://stackoverflow.com/questions/33408762/bash-turning-single-c
awk '{split($2,a,",");for(i in a)print $1"\t"a[i]}' file awk '{split($2,a,",");for(i in a)print $1"\t"a[i]}' file
``` ```
#####sum up a file #####sum up a file (each line in file contains only one number)
```bash ```bash
awk '{s+=$1} END {print s}' filename awk '{s+=$1} END {print s}' filename
``` ```
#####average a file (each line in file contains only one number)
```bash
awk '{s+=$1}END{print s/NR}'
```
#####print field start with string (e.g Linux) #####print field start with string (e.g Linux)
```bash ```bash