Commit Graph

4 Commits

Author SHA1 Message Date
AnotherTest
3b8fa5a753 Shell: Add support for indexing into variables
Now a variable may have an optional slice (only _one_ slice), which can
also use negative indices to index from the end.
This works on both lists and strings.
The contents of the slice have the same semantics as brace expansions.
For example:
```sh
$ x=(1 2 3 4 5 6)
$ echo $x[1..3] # select indices 1, 2, 3
2 3 4
$ echo $x[3,4,1,0] # select indices 3, 4, 1, 0 (in that order)
4 5 2 1
$ x="Well Hello Friends!"
$ echo $x[5..9]
Hello
```
2021-03-22 13:15:08 +01:00
AnotherTest
a45b2ea6fb Shell: Add support for 'immediate' expressions as variable substitutions
This commit adds a few basic variable substitution operations:
- length
    Find the length of a string or a list
- length_across
    Find the lengths of things inside a list
- remove_{suffix,prefix}
    Remove a suffix or a prefix from all the passed values
- regex_replace
    Replace all matches of a given regex with a given template
- split
    Split the given string with the given delimiter (or to its
    code points if the delimiter is empty)
- concat_lists
    concatenates any given lists into one

Closes #4316 (the ancient version of this same feature)
2021-03-07 10:59:51 +01:00
AnotherTest
c1b4e86004 Shell: Add formatter for history events 2021-01-15 19:13:03 +01:00
Andreas Kling
c4e2fd8123 Shell: Move to Userland/Shell/ 2021-01-12 12:04:07 +01:00