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Add docs for ntup, maybe, is* predicates

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Updated ntup docs to show nested tuples, and comma safe elements.
Added docs for maybe and is* predicates.
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Tom Poindexter 2019-10-02 17:54:48 -06:00 committed by GitHub
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@ -197,17 +197,17 @@ one
## *ntup/ntupx/ntupl/ntupr*
```bash
$ ntup a 1 b 2 c 3
(YQo=,MQo=,Ygo=,Mgo=,Ywo=,Mwo=)
$ ntup tuples that $(ntup safely nest)
(dHVwbGVzCg==,dGhhdAo=,KGMyRm1aV3g1Q2c9PSxibVZ6ZEFvPSkK)
$ echo '(YQo=,MQo=,Ygo=,Mgo=,Ywo=,Mwo=)' | ntupx 3
b
echo '(dHVwbGVzCg==,dGhhdAo=,KGMyRm1aV3g1Q2c9PSxibVZ6ZEFvPSkK)' | ntupx 3 | ntupr
nest
$ ntup 'foo bar' 1 one 1
(Zm9vIGJhcgo=,MQo=,b25lCg==,MQo=)
$ ntup 'foo,bar' 1 one 1
(Zm9vLGJhcgo=,MQo=,b25lCg==,MQo=)
$ echo '(Zm9vIGJhcgo=,MQo=,b25lCg==,MQo=)' | ntupx 1
foo bar
$ echo '(Zm9vLGJhcgo=,MQo=,b25lCg==,MQo=)' | ntupx 1
foo,bar
```
```bash
@ -305,15 +305,94 @@ $ echo $a
## *maybe/maybemap/maybevalue*
TODO
```bash
$ list Hello | maybe
(Just,Hello)
$ list " " | maybe
(Nothing)
$ list Hello | maybe | maybemap λ a . 'tr oH Oh <<<$a'
(Just,hellO)
$ list " " | maybe | maybemap λ a . 'tr oH Oh <<<$a'
(Nothing)
$ echo bash-fun rocks | maybe | maybevalue DEFAULT
bash-fun rocks
$ echo | maybe | maybevalue DEFAULT
DEFAULT
```
## *not/isint/isempty*
TODO
```bash
$ isint 42
true
$ list blah | isint
false
$ not true
false
$ not isint 777
false
$ list 1 2 "" c d 6 | filter λ a . 'isint $a'
1
2
6
$ list 1 2 "" c d 6 | filter λ a . 'not isempty $a'
1
2
c
d
6
```
## *isfile/isnonzerofile/isreadable/iswritable/isdir*
TODO
```bash
$ touch /tmp/foo
$ isfile /tmp/foo
true
$ not iswritable /
true
$ files="/etc/passwd /etc/sudoers /tmp /tmp/foo /no_such_file"
$ list $files | filter λ a . 'isfile $a'
/etc/passwd
/etc/sudoers
/tmp/foo
$ list $files | filter λ a . 'isdir $a'
/tmp
$ list $files | filter λ a . 'isreadable $a'
/etc/passwd
/tmp
/tmp/foo
$ list $files | filter λ a . 'iswritable $a'
/tmp
/tmp/foo
$ list $files | filter λ a . 'isnonzerofile $a'
/etc/passwd
/etc/sudoers
/tmp
$ list $files | filter λ a . 'not isfile $a'
/tmp
/no_such_file
```
## *try/catch*