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I wouldn't use grep. As the other answers already said, it's not the right tool for this job. Considering your specific case (fields separated by /), basename is the most straighforward way, as st...
Answer
#3: Post edited
by
hkotsubo
·
2022-07-21T12:26:05Z (almost 2 years ago)
- I wouldn't use `grep`. As the other answers already said, it's not the right tool for this job.
- Considering your specific case (fields separated by `/`), `basename` is the most straighforward way, as stated in [Dirk's answer](https://software.codidact.com/posts/286764/286771#answer-286771). I just want to provide some other alternatives.
- ---
- # `cut`
- The `cut` command can separate the input in fields and allows you to get only the ones you need. If you know for sure that the inputs will always be `branches/features/something`, then you can use `/` as separator and get the third field:
- ```bash
- echo $CCSR | cut -d / -f 3
- ```
- Or, if you don't know how many fields there will be, there's a little trick to get the last one:
- ```bash
- echo $CCSR | rev | cut -d / -f 1 | rev
- ```
- `rev` reverses the input, so first I reverse it, get the first field and reverse it again. The result will be the last field.
- # `awk`
- The `awk` command works in a similar way: we tell it what the separator is and can get specific fields. The difference is that it has a [better way](https://www.gnu.org/software/gawk/manual/gawk.html#Fields) to get the last one, by using the predefined variable `NF`:
- ```bash
- echo $CCSR | awk -F / '{print $NF}'
- ```
- ---
Although `basename` is the most straighforward solution for your case, please note that`cut` and `awk` are more generic, as they can work with different separators and allows you to get specific ones (not only the last).
- I wouldn't use `grep`. As the other answers already said, it's not the right tool for this job.
- Considering your specific case (fields separated by `/`), `basename` is the most straighforward way, as stated in [Dirk's answer](https://software.codidact.com/posts/286764/286771#answer-286771). I just want to provide some other alternatives.
- ---
- # `cut`
- The `cut` command can separate the input in fields and allows you to get only the ones you need. If you know for sure that the inputs will always be `branches/features/something`, then you can use `/` as separator and get the third field:
- ```bash
- echo $CCSR | cut -d / -f 3
- ```
- Or, if you don't know how many fields there will be, there's a little trick to get the last one:
- ```bash
- echo $CCSR | rev | cut -d / -f 1 | rev
- ```
- `rev` reverses the input, so first I reverse it, get the first field and reverse it again. The result will be the last field.
- # `awk`
- The `awk` command works in a similar way: we tell it what the separator is and can get specific fields. The difference is that it has a [better way](https://www.gnu.org/software/gawk/manual/gawk.html#Fields) to get the last one, by using the predefined variable `NF`:
- ```bash
- echo $CCSR | awk -F / '{print $NF}'
- ```
- ---
- Although `basename` is the most straighforward solution for your case, please note that`cut` and `awk` are more generic, as they can work with different separators and allows you to get specific fields (not only the last one).
#2: Post edited
by
hkotsubo
·
2022-07-21T11:45:05Z (almost 2 years ago)
- I wouldn't use `grep`. As the other answers already said, it's not the right tool for this job.
- Considering your specific case (fields separated by `/`), `basename` is the most straighforward way, as stated in [Dirk's answer](https://software.codidact.com/posts/286764/286771#answer-286771). I just want to provide some other alternatives.
- ---
- # `cut`
- The `cut` command can separate the input in fields and allows you to get only the ones you need. If you know for sure that the inputs will always be `branches/features/something`, then you can use `/` as separator and get the third field:
- ```bash
- echo $CCSR | cut -d / -f 3
- ```
- Or, if you don't know how many fields there will be, there's a little trick to get the last one:
- ```bash
- echo $CCSR | rev | cut -d / -f 1 | rev
- ```
- `rev` reverses the input, so first I reverse it, get the first field and reverse it again. The result will be the last field.
- # `awk`
The `awk` command works in a similar way: we tell it what the separator is and can get specific fields. The difference is that it has a nice syntax to get the last one:- ```bash
- echo $CCSR | awk -F / '{print $NF}'
- ```
- ---
- Although `basename` is the most straighforward solution for your case, please note that`cut` and `awk` are more generic, as they can work with different separators and allows you to get specific ones (not only the last).
- I wouldn't use `grep`. As the other answers already said, it's not the right tool for this job.
- Considering your specific case (fields separated by `/`), `basename` is the most straighforward way, as stated in [Dirk's answer](https://software.codidact.com/posts/286764/286771#answer-286771). I just want to provide some other alternatives.
- ---
- # `cut`
- The `cut` command can separate the input in fields and allows you to get only the ones you need. If you know for sure that the inputs will always be `branches/features/something`, then you can use `/` as separator and get the third field:
- ```bash
- echo $CCSR | cut -d / -f 3
- ```
- Or, if you don't know how many fields there will be, there's a little trick to get the last one:
- ```bash
- echo $CCSR | rev | cut -d / -f 1 | rev
- ```
- `rev` reverses the input, so first I reverse it, get the first field and reverse it again. The result will be the last field.
- # `awk`
- The `awk` command works in a similar way: we tell it what the separator is and can get specific fields. The difference is that it has a [better way](https://www.gnu.org/software/gawk/manual/gawk.html#Fields) to get the last one, by using the predefined variable `NF`:
- ```bash
- echo $CCSR | awk -F / '{print $NF}'
- ```
- ---
- Although `basename` is the most straighforward solution for your case, please note that`cut` and `awk` are more generic, as they can work with different separators and allows you to get specific ones (not only the last).
#1: Initial revision
by
hkotsubo
·
2022-07-21T11:41:12Z (almost 2 years ago)
I wouldn't use `grep`. As the other answers already said, it's not the right tool for this job.
Considering your specific case (fields separated by `/`), `basename` is the most straighforward way, as stated in [Dirk's answer](https://software.codidact.com/posts/286764/286771#answer-286771). I just want to provide some other alternatives.
---
# `cut`
The `cut` command can separate the input in fields and allows you to get only the ones you need. If you know for sure that the inputs will always be `branches/features/something`, then you can use `/` as separator and get the third field:
```bash
echo $CCSR | cut -d / -f 3
```
Or, if you don't know how many fields there will be, there's a little trick to get the last one:
```bash
echo $CCSR | rev | cut -d / -f 1 | rev
```
`rev` reverses the input, so first I reverse it, get the first field and reverse it again. The result will be the last field.
# `awk`
The `awk` command works in a similar way: we tell it what the separator is and can get specific fields. The difference is that it has a nice syntax to get the last one:
```bash
echo $CCSR | awk -F / '{print $NF}'
```
---
Although `basename` is the most straighforward solution for your case, please note that`cut` and `awk` are more generic, as they can work with different separators and allows you to get specific ones (not only the last).