feat: fix and update some examples (#4844)

docs/commands/ls.md

@@ -35,3 +35,18 @@ List all rust files
 ```shell
 > ls *.rs
 ```
+
+List all files and directories whose name do not contain 'bar'
+```shell
+> ls -s | where name !~ bar
+```
+
+List all dirs with full path name in your home directory
+```shell
+> ls -f ~ | where type == dir
+```
+
+List all dirs in your home directory which have not been modified in 7 days
+```shell
+> ls -s ~ | where type == dir && modified < ((date now) - 7day)
+```

docs/commands/reduce.md

@@ -23,6 +23,11 @@ Sum values of a list (same as 'math sum')
 > [ 1 2 3 4 ] | reduce {|it, acc| $it + $acc }
 ```
 
+Sum values of a list (same as 'math sum')
+```shell
+> [ 1 2 3 ] | reduce -n {|it, acc| $acc + $it.item }
+```
+
 Sum values with a starting value (fold)
 ```shell
 > [ 1 2 3 4 ] | reduce -f 10 {|it, acc| $acc + $it }

docs/commands/where.md

@@ -33,5 +33,5 @@ List all files with names that contain "Car"
 
 List all files that were modified in the last two weeks
 ```shell
-> ls | where modified <= 2wk
+> ls | where modified >= (date now) - 2wk
 ```