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add variable replacement

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onceupon 2017-10-27 11:13:54 +08:00 committed by GitHub
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@ -1323,6 +1323,12 @@ e.g. replace all
{i//a/,}
```
//for variable i, replace all 'a' with a comma
e.g. with grep
```bash
test="god the father"
grep ${test// /\\\|} file.txt
#turning the space into 'or' (\|) in grep
```
##### Read user input