Simplified, shellchecked, and name deconflicted for personal use

This commit is contained in:
Brandon Rozek 2020-12-14 10:08:36 -05:00
parent 142e1bade4
commit 46722c9b5d
17 changed files with 540 additions and 774 deletions

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2.4
2.5b

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MIT License
Copyright (c) 2020 Brandon Rozek
Copyright (c) 2019 Sławomir Śledź
Permission is hereby granted, free of charge, to any person obtaining a copy

314
README.md
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@ -1,12 +1,15 @@
# Introduction
[Introduction to fun.sh library](http://ssledz.github.io/presentations/bash-fun.html#/)
This is a fork of [ssledz's fun.sh library](https://github.com/ssledz/bash-fun).
This is mainly for my own personal use cases. So I would recommend using ssledz's version instead.
I mainly worked towards getting this library to mostly pass shellcheck, removed some functionality,
and name deconflicted some of the functions with what I had in my system.
# Quick start
```bash
#!/bin/bash
. <(test -e fun.sh || curl -Ls https://raw.githubusercontent.com/ssledz/bash-fun/master/src/fun.sh > fun.sh; cat fun.sh)
. <(test -e fun.sh || curl -Ls https://raw.githubusercontent.com/brandon-rozek/bash-fun/master/src/fun.sh > fun.sh; cat fun.sh)
seq 1 4 | sum
```
@ -14,17 +17,17 @@ seq 1 4 | sum
# Functions overview
|||||||
|------|------|------|------|------|------|
|**append**|**buff**|**call**|**catch**|**curry**|**div**|
|**drop**|**dropw**|**factorial**|**filter**|**foldl**|**foldr**|
|**list_append**|**divide**|**take_while**|
|**list_drop**|**drop_while**|**factorial**|**filter**|**foldl**|
|**isint**|**isempty**|**isfile**|**isnonzerofile**|**isreadable**|**iswritable**|
|**isdir**|**join**|**lambda**|**last**|**lhead**|**list**|
|**ltail**|**lzip**|**map**|**maybe**|**maybemap**|**maybevalue**|
|**mod**|**mul**|**not**|**ntup**|**ntupl**|**ntupr**|
|**ntupx**|**peek**|**plus**|**prepend**|**product**|**ret**|
|**res**|**revers**|**revers_str**|**scanl**|**splitc**|**strip**|
|**stripl**|**stripr**|**sub**|**sum**|**take**|**try**|
|**tup**|**tupl**|**tupr**|**tupx**|**unlist**|**λ**|
|**with_trampoline**|
|**isdir**|**list_join**|**lambda**|**list_last**|**list_head**|**list**|
|**list_tail**|**list_zip**|**list_map**|
|**mod**|**multiply**|**not**|
|**add**|**list_prepend**|**product**|**ret**|
|**revers**|**revers_str**|**scanl**|**splitc**|**strip**|
|**stripl**|**stripr**|**subtract**|**sum**|**take**|
|**tup**|**unlist**|**λ**|
## *list/unlist*
@ -38,25 +41,25 @@ $ list 1 2 3 4 5 | unlist
1 2 3 4 5
```
## *take/drop/ltail/lhead/last*
## *list_take/list_drop/list_tail/list_head/list_last*
```bash
$ list 1 2 3 4 | drop 2
$ list 1 2 3 4 | list_drop 2
3
4
$ list 1 2 3 4 5 | lhead
$ list 1 2 3 4 5 | list_head
1
$ list 1 2 3 4 | ltail
$ list 1 2 3 4 | list_tail
2
3
4
$ list 1 2 3 4 5 | last
$ list 1 2 3 4 5 | list_last
5
$ list 1 2 3 4 5 | take 2
$ list 1 2 3 4 5 | list_take 2
1
2
```
@ -64,61 +67,36 @@ $ list 1 2 3 4 5 | take 2
## *join*
```bash
$ list 1 2 3 4 5 | join ,
$ list 1 2 3 4 5 | list_join ,
1,2,3,4,5
$ list 1 2 3 4 5 | join , [ ]
[1,2,3,4,5]
```
## *map*
```bash
$ seq 1 5 | map λ a . 'echo $((a + 5))'
$ seq 1 5 | list_map λ a . 'echo $((a + 5))'
6
7
8
9
10
$ list a b s d e | map λ a . 'echo $a$(echo $a | tr a-z A-Z)'
$ list a b s d e | list_map λ a . 'echo $a$(echo $a | tr a-z A-Z)'
aA
bB
sS
dD
eE
$ list 1 2 3 | map echo
$ list 1 2 3 | list_map tee
1
2
3
$ list 1 2 3 | map 'echo $ is a number'
1 is a number
2 is a number
3 is a number
$ list 1 2 3 4 | map 'echo \($,$\) is a point'
(1,1) is a point
(2,2) is a point
(3,3) is a point
(4,4) is a point
```
## *flat map*
```bash
$ seq 2 3 | map λ a . 'seq 1 $a' | join , [ ]
[1,2,1,2,3]
$ list a b c | map λ a . 'echo $a; echo $a | tr a-z A-z' | join , [ ]
[a,A,b,B,c,C]
```
## *filter*
```bash
$ seq 1 10 | filter λ a . '[[ $(mod $a 2) -eq 0 ]] && ret true || ret false'
$ seq 1 10 | filter even
2
4
6
@ -131,10 +109,6 @@ $ seq 1 10 | filter λ a . '[[ $(mod $a 2) -eq 0 ]] && ret true || ret false'
```bash
$ list a b c d | foldl λ acc el . 'echo -n $acc-$el'
a-b-c-d
$ list '' a b c d | foldr λ acc el .\
'if [[ ! -z $acc ]]; then echo -n $acc-$el; else echo -n $el; fi'
d-c-b-a
```
```bash
@ -143,11 +117,8 @@ $ seq 1 4 | foldl λ acc el . 'echo $(($acc + $el))'
```
```bash
$ seq 1 4 | foldl λ acc el . 'echo $(mul $(($acc + 1)) $el)'
$ seq 1 4 | foldl λ acc el . 'echo $(multiply $(($acc + 1)) $el)'
64 # 1 + (1 + 1) * 2 + (4 + 1) * 3 + (15 + 1) * 4 = 64
$ seq 1 4 | foldr λ acc el . 'echo $(mul $(($acc + 1)) $el)'
56 # 1 + (1 + 1) * 4 + (8 + 1) * 3 + (27 + 1) * 2 = 56
```
## *tup/tupx/tupl/tupr*
@ -160,19 +131,16 @@ $ tup 'foo bar' 1 'one' 2
(foo bar,1,one,2)
$ tup , 1 3
(u002c,1,3)
(,,1,3)
```
```bash
$ tupl $(tup a 1)
$ echo tup a 1 | tupl
a
$ tupr $(tup a 1)
$ echo tup a 1 | tupr
1
$ tup , 1 3 | tupl
,
$ tup 'foo bar' 1 'one' 2 | tupl
foo bar
@ -180,63 +148,10 @@ $ tup 'foo bar' 1 'one' 2 | tupr
2
```
```bash
$ tup 'foo bar' 1 'one' 2 | tupx 2
1
$ tup 'foo bar' 1 'one' 2 | tupx 1,3
foo bar
one
$ tup 'foo bar' 1 'one' 2 | tupx 2-4
1
one
2
```
## *ntup/ntupx/ntupl/ntupr*
## *list_zip*
```bash
$ ntup tuples that $(ntup safely nest)
(dHVwbGVzCg==,dGhhdAo=,KGMyRm1aV3g1Q2c9PSxibVZ6ZEFvPSkK)
echo '(dHVwbGVzCg==,dGhhdAo=,KGMyRm1aV3g1Q2c9PSxibVZ6ZEFvPSkK)' | ntupx 3 | ntupr
nest
$ ntup 'foo,bar' 1 one 1
(Zm9vLGJhcgo=,MQo=,b25lCg==,MQo=)
$ echo '(Zm9vLGJhcgo=,MQo=,b25lCg==,MQo=)' | ntupx 1
foo,bar
```
```bash
$ ntupl $(ntup 'foo bar' 1 one 2)
foo bar
$ ntupr $(ntup 'foo bar' 1 one 2)
2
```
## *buff*
```bash
$ seq 1 10 | buff λ a b . 'echo $(($a + $b))'
3
7
11
15
19
$ seq 1 10 | buff λ a b c d e . 'echo $(($a + $b + $c + $d + $e))'
15
40
```
## *lzip*
```bash
$ list a b c d e f | lzip $(seq 1 10)
$ list a b c d e f | list_zip $(seq 1 10)
(a,1)
(b,2)
(c,3)
@ -246,86 +161,10 @@ $ list a b c d e f | lzip $(seq 1 10)
```
```bash
$ list a b c d e f | lzip $(seq 1 10) | last | tupr
$ list a b c d e f | list_zip $(seq 1 10) | list_last | tupr
6
```
## *curry*
```bash
add2() {
echo $(($1 + $2))
}
```
```bash
$ curry inc add2 1
```
```bash
$ inc 2
3
$ seq 1 3 | map λ a . 'inc $a'
2
3
4
```
## *peek*
```bash
$ list 1 2 3 \
| peek lambda a . echo 'dbg a : $a' \
| map lambda a . 'mul $a 2' \
| peek lambda a . echo 'dbg b : $a' \
| sum
dbg a : 1
dbg a : 2
dbg a : 3
dbg b : 2
dbg b : 4
dbg b : 6
12
```
```bash
$ a=$(seq 1 4 | peek lambda a . echo 'dbg: $a' | sum)
dbg: 1
dbg: 2
dbg: 3
dbg: 4
$ echo $a
10
```
## *maybe/maybemap/maybevalue*
```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*
```bash
@ -338,7 +177,7 @@ false
$ not true
false
$ not isint 777
$ not "isint 777"
false
$ list 1 2 "" c d 6 | filter λ a . 'isint $a'
@ -346,7 +185,7 @@ $ list 1 2 "" c d 6 | filter λ a . 'isint $a'
2
6
$ list 1 2 "" c d 6 | filter λ a . 'not isempty $a'
$ list 1 2 "" c d 6 | filter λ a . 'not "isempty $a"'
1
2
c
@ -393,35 +232,6 @@ $ list $files | filter λ a . 'not isfile $a'
/tmp
/no_such_file
```
## *try/catch*
```bash
$ echo 'expr 2 / 0' | try λ _ . 'echo 0'
0
$ echo 'expr 2 / 0' | try λ status . 'echo $status'
2
$ echo 'expr 2 / 2' | try λ _ . 'echo 0'
1
```
```bash
try λ _ . 'echo some errors during pull; exit 1' < <(echo git pull)
```
```bash
$ echo 'expr 2 / 0' \
| LANG=en catch λ cmd status val . 'echo cmd=$cmd,status=$status,val=$val'
cmd=expr 2 / 0,status=2,val=(expr:,division,by,zero)
```
```bash
$ echo 'expr 2 / 2' | catch λ _ _ val . 'tupl $val'
1
```
## *scanl*
```bash
@ -434,58 +244,10 @@ $ seq 1 5 | scanl lambda acc el . 'echo $(($acc + $el))'
```
```bash
$ seq 1 5 | scanl lambda a b . 'echo $(($a + $b))' | last
$ seq 1 5 | scanl lambda a b . 'echo $(($a + $b))' | list_last
15
```
## *with_trampoline/res/call*
```bash
factorial() {
fact_iter() {
local product=$1
local counter=$2
local max_count=$3
if [[ $counter -gt $max_count ]]; then
res $product
else
call fact_iter $(echo $counter\*$product | bc) $(($counter + 1)) $max_count
fi
}
with_trampoline fact_iter 1 1 $1
}
```
```bash
$ time factorial 30 | fold -w 70
265252859812191058636308480000000
real 0m1.854s
user 0m0.072s
sys 0m0.368s
```
```bash
time factorial 60 | fold -w 70
8320987112741390144276341183223364380754172606361245952449277696409600
000000000000
real 0m3.635s
user 0m0.148s
sys 0m0.692s
```
```bash
$ time factorial 90 | fold -w 70
1485715964481761497309522733620825737885569961284688766942216863704985
393094065876545992131370884059645617234469978112000000000000000000000
real 0m4.371s
user 0m0.108s
sys 0m0.436s
```
# Examples
```bash
@ -498,7 +260,7 @@ processNames() {
list $@ \
| filter λ name . '[[ ${#name} -gt 1 ]] && ret true || ret false' \
| map λ name . 'uppercase $name' \
| list_map λ name . 'uppercase $name' \
| foldl λ acc el . 'echo $acc,$el'
}
@ -511,7 +273,7 @@ Adam,Monika,Slawek,Daniel,Bartek
```
# Running tests
TODO: Need to change the tests here
```bash
cd test
./test_runner

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@ -1,437 +1,548 @@
#!/bin/bash
drop() {
command tail -n +$(($1 + 1))
}
take() {
command head -n ${1}
}
ltail() {
drop 1
}
lhead() {
take 1
}
last() {
command tail -n 1
}
#!/bin/sh
###############################################
## List Functions
###############################################
list() {
for i in "$@"; do
echo "$i"
done
for i in "$@"; do
echo "$i"
done
}
unlist() {
cat - | xargs
xargs
}
append() {
cat -
list "$@"
# Drop the first n items of a list.
list_drop() {
command tail -n +$(($1 + 1))
}
prepend() {
list "$@"
cat -
# Take the first n items of a list.
list_take() {
command head -n "$1"
}
# Take the 'tail' of a list.
# Otherwise known as dropping the first element.
list_tail() {
list_drop 1
}
# Take only the first element of the list.
list_head() {
list_take 1
}
# Take the last element of the list.
list_last() {
command tail -n 1
}
# Add the contents of standard input
# to the end of the list.
list_append() {
cat -
list "$@"
}
# Add the contents of standard input
# to the beginning of the list.
list_prepend() {
list "$@"
cat -
}
###############################################
## Lambdas and Lists
###############################################
# Defines an anonymous function.
lambda() {
# shellcheck disable=2039
local expression
lam() {
# shellcheck disable=2039
local arg
while [ $# -gt 0 ]; do
arg="$1"
shift
if [ "$arg" = '.' ]; then
echo "$@"
return
else
echo "read $arg;"
fi
done
}
lam() {
local arg
while [[ $# -gt 0 ]]; do
arg="$1"
shift
if [[ $arg = '.' ]]; then
echo "$@"
return
else
echo "read $arg;"
fi
done
}
eval $(lam "$@")
expression=$(lam "$@")
eval "$expression"
}
# Same as lambda.
# shellcheck disable=2039
λ() {
lambda "$@"
lambda "$@"
}
map() {
if [[ $1 != "λ" ]] && [[ $1 != "lambda" ]]; then
# Print the number of arguments a lambda takes.
# shellcheck disable=2039
λ_num_args() {
# Calculates the number of arguments a lambda takes
minus "$#" 3
}
local has_dollar=$(list $@ | grep '\$' | wc -l)
if [[ $has_dollar -ne 0 ]]; then
args=$(echo $@ | sed -e 's/\$/\$a/g')
map λ a . $args
else
map λ a . "$@"' $a'
fi
else
# Perform an operation to each
# element(s) of a list provided
# through standard input.
list_map() {
# shellcheck disable=2039
local x
while read x; do
echo "$x" | "$@"
done
fi
}
foldl() {
local f="$@"
local acc
read acc
while read elem; do
acc="$({ echo $acc; echo $elem; } | $f )"
done
echo "$acc"
}
foldr() {
local f="$@"
local acc
local zero
read zero
foldrr() {
local elem
if read elem; then
acc=$(foldrr)
# [[ -z $acc ]] && echo $elem && return
else
echo $zero && return
# shellcheck disable=2039
local i
# shellcheck disable=2039
local arguments
# shellcheck disable=2039
local num_args
if [ "$1" = "λ" ] || [ "$1" = "lambda" ]; then
num_args=$(λ_num_args "$@")
while read -r x; do
arguments="$x"
i=2
while [ $i -le "$num_args" ] ; do
read -r x
arguments="$arguments $x"
i=$(add $i 1)
done
# We want to word split arguments, so no quotes
eval "list $arguments" | "$@"
done
else # Do not know the arity, assume 1
while read -r x; do
echo "$x" | "$@"
done
fi
acc="$({ echo $acc; echo $elem; } | $f )"
echo "$acc"
}
foldrr
}
# Perform a binary operation on a list
# where one element is the accumulation
# of the results so far.
# Ex: seq 3 | foldl lambda a b . 'minus $a $b'
# First is (1 - 2 = -1) then (-1 - 3 = -4).
foldl() {
# shellcheck disable=2039
local acc
read -r acc
while read -r elem; do
acc=$({ echo "$acc"; echo "$elem"; } | "$@" )
done
echo "$acc"
}
# Constructs a list where each element
# is the foldl of the 0th-ith elements of
# the list.
scanl() {
local f="$@"
local acc
read acc
echo $acc
while read elem; do
acc="$({ echo $acc; echo $elem; } | $f )"
# shellcheck disable=2039
local acc
read -r acc
echo "$acc"
done
while read -r elem; do
acc=$({ echo "$acc"; echo "$elem"; } | "$@" )
echo "$acc"
done
}
mul() {
( set -f; echo $(($1 * $2)) )
# Drops any elements of the list where the
# function performed on it evaluates to false.
filter() {
# shellcheck disable=2039
local x
while read -r x; do
ret=$(echo "$x" | "$@")
if_then "$ret" "echo $x"
done
}
plus() {
echo $(($1 + $2))
# Keep taking elements until a certain condition
# is false.
take_while() {
# shellcheck disable=2039
local x
# shellcheck disable=2039
local condition
while read -r x; do
condition="$(echo "$x" | "$@")"
if_then_else "$condition" "echo $x" "break"
done
}
sub() {
echo $(($1 - $2))
# Keep dropping elements until a certain condition
# is false.
drop_while() {
# shellcheck disable=2039
local x
while read -r x; do
condition="$(echo "$x" | "$@")"
if_then_else "$condition" 'do_nothing' 'break'
done
if_then "[ -n $x ]" "{ echo $x; cat -; }"
}
div() {
echo $(($1 / $2))
###############################################
## Arithmetic Functions
###############################################
multiply() {
# shellcheck disable=2039
local a
# shellcheck disable=2039
local b
a=$1
if [ $# -lt 2 ] ; then
read -r b
else
b=$2
fi
isint "$a" > /dev/null && \
isint "$b" > /dev/null && \
echo $((a * b))
}
add() {
# shellcheck disable=2039
local a
# shellcheck disable=2039
local b
a=$1
if [ $# -lt 2 ] ; then
read -r b
else
b=$2
fi
isint "$a" > /dev/null && \
isint "$b" > /dev/null && \
echo $((a + b))
}
minus() {
# shellcheck disable=2039
local a
# shellcheck disable=2039
local b
a=$1
if [ $# -lt 2 ] ; then
b=$1
read -r a
else
b=$2
fi
isint "$a" > /dev/null && \
isint "$b" > /dev/null && \
echo $((a - b))
}
divide() {
# shellcheck disable=2039
local a
# shellcheck disable=2039
local b
a=$1
if [ $# -lt 2 ] ; then
b=$1
read -r a
else
b=$2
fi
isint "$a" > /dev/null && \
isint "$b" > /dev/null && \
echo $((a / b))
}
mod() {
echo $(($1 % $2))
# shellcheck disable=2039
local a
# shellcheck disable=2039
local b
a=$1
if [ $# -lt 2 ] ; then
b=$1
read -r a
else
b=$2
fi
isint "$a" > /dev/null && \
isint "$b" > /dev/null && \
echo $((a % b))
}
even() {
# shellcheck disable=2039
local n
# shellcheck disable=2039
local result
# shellcheck disable=2039
local result_code
if [ $# -lt 1 ] ; then
read -r n
else
n=$1
fi
result=$(mod "$n" 2)
result_code=$?
if [ $result_code -ne 0 ] ; then
ret false
else
result_to_bool "[ $result = 0 ]"
fi
}
odd() {
not even
}
less_than() {
# shellcheck disable=2039
local n
read -r n
if isint "$n" > /dev/null && \
[ "$n" -lt "$1" ] ; then
ret true
else
ret false
fi
}
sum() {
foldl lambda a b . 'echo $(($a + $b))'
foldl lambda a b . "add \$a \$b"
}
product() {
foldl lambda a b . 'echo $(mul $a $b)'
foldl lambda a b . "multiply \$a \$b"
}
factorial() {
seq 1 $1 | product
seq 1 "$1" | product
}
###############################################
## String Operations
###############################################
# Splits a string into a list where each element
# is one character.
splitc() {
cat - | sed 's/./&\n/g'
sed 's/./\n&/g' | list_tail
}
join() {
local delim=$1
local pref=$2
local suff=$3
echo $pref$(cat - | foldl lambda a b . 'echo $a$delim$b')$suff
# Takes a list and creates a string where
# each element is seperated by a delimiter.
list_join() {
# shellcheck disable=2039
local delim
delim=$1
foldl lambda a b . "echo \$a$delim\$b"
}
# Split a string into a list
# by a specified delimeter
str_split() {
sed "s/$1/\n/g"
}
# Reverses a list.
revers() {
foldl lambda a b . 'append $b $a'
# shellcheck disable=2039
local result
# shellcheck disable=2039
local n
while read -r n; do
result="$n\n$result"
done
echo "$result"
}
revers_str() {
cat - | splitc | revers | join
# Removes multiple occurences of
# a single character from the beginning
# of the list.
lstrip() {
# shellcheck disable=2039
local c
if [ $# -eq 0 ] ; then
c=" "
else
c="$1"
fi
sed "s/^$c*//g"
}
catch() {
local f="$@"
local cmd=$(cat -)
local val=$(2>&1 eval "$cmd"; echo $?)
local cnt=$(list $val | wc -l)
local status=$(list $val | last)
$f < <(list "$cmd" $status $(list $val | take $((cnt - 1)) | unlist | tup))
# Removes multiple occurences of
# a single character from the end
# of the list.
rstrip() {
# shellcheck disable=2039
local c
if [ $# -eq 0 ] ; then
c=" "
else
c="$1"
fi
sed "s/$c*$//g"
}
try() {
local f="$@"
catch lambda cmd status val . '[[ $status -eq 0 ]] && tupx 1- $val | unlist || { '"$f"' < <(list $status); }'
# Removes multiple occurences of
# a single character from the beginning
# and end of the list.
strip() {
lstrip "$@" | rstrip "$@"
}
###############################################
## Tuple Functions
###############################################
# Creates a tuple, which is a string with
# multiple elements seperated by a comma,
# and it begins with a ( and ends with a ).
tup() {
# shellcheck disable=2039
local args
# shellcheck disable=2039
local result
if [ $# -eq 0 ]; then
args=$(unlist)
eval "tup $args"
else
result=$(list "$@" | list_join ,)
echo "($result)"
fi
}
# Takes a tuple and outputs it as a list
tup_to_list() {
local li
local f
local la
li=$(str_split ",")
# Remove '(' from the first element
f=$(echo "$li" | list_head)
f=$(echo "$f" | sed 's/^(//')
la=$(echo "$li" | list_last)
# If there is only one element in the list
# Remove ')' from the only element
if [ "$(echo "$la" | cut -c1)" = "(" ]; then
f=$(echo "$f" | sed "s/)$//")
echo "$f"
# If there is more than one element in the list
# Remove ')' from the last element
else
la=$(echo "$la" | sed "s/)$//")
# Remove the first and last element from li
li=$(echo "$li" | list_tail | sed '$d')
# Print the list
{ echo "$f"; echo "$li"; echo "$la"; }
fi
}
# Takes the first element of the tuple
tupl() {
tup_to_list | list_head
}
# Takes the last element of the tuple
tupr() {
tup_to_list | list_last
}
# Takes each element from a list in standard
# input and matches it with a list provided
# as the argument to this function.
# The result is a list of 2-tuples.
list_zip() {
# shellcheck disable=2039
local l
l=$(list "$@")
while read -r x; do
y=$(echo "$l" | list_take 1)
tup "$x" "$y"
l=$(echo "$l" | list_drop 1)
done
}
###############################################
## Logic Based Functions
###############################################
if_then() {
# shellcheck disable=2039
local result
eval "$1"
result=$?
if [ $result -eq 0 ] ; then
eval "$2"
fi
}
if_then_else() {
# shellcheck disable=2039
local result
eval "$1"
result=$?
if [ $result -eq 0 ] ; then
eval "$2"
else
eval "$3"
fi
}
result_to_bool() {
if_then_else "$1" 'ret true' 'ret false'
}
not() {
if_then_else "$1 > /dev/null" "ret false" "ret true"
}
ret() {
echo $@
echo "$@"
"$@"
}
filter() {
local x
while read x; do
ret=$(echo "$x" | "$@")
$ret && echo $x
done
}
pass() {
echo > /dev/null
}
dropw() {
local x
while read x && $(echo "$x" | "$@"); do
pass
done
[[ ! -z $x ]] && { echo $x; cat -; }
}
peek() {
local x
while read x; do
([ $# -eq 0 ] && 1>&2 echo $x || 1>&2 "$@" < <(echo $x))
echo $x
done
}
stripl() {
local arg=$1
cat - | map lambda l . 'ret ${l##'$arg'}'
}
stripr() {
local arg=$1
cat - | map lambda l . 'ret ${l%%'$arg'}'
}
strip() {
local arg=$1
cat - | stripl "$arg" | stripr "$arg"
}
buff() {
local cnt=-1
for x in $@; do
[[ $x = '.' ]] && break
cnt=$(plus $cnt 1)
done
local args=''
local i=$cnt
while read arg; do
[[ $i -eq 0 ]] && list $args | "$@" && i=$cnt && args=''
args="$args $arg"
i=$(sub $i 1)
done
[[ ! -z $args ]] && list $args | "$@"
}
tup() {
if [[ $# -eq 0 ]]; then
local arg
read arg
tup $arg
else
list "$@" | map lambda x . 'echo ${x//,/u002c}' | join , '(' ')'
fi
}
tupx() {
if [[ $# -eq 1 ]]; then
local arg
read arg
tupx "$1" "$arg"
else
local n=$1
shift
echo "$@" | stripl '(' | stripr ')' | cut -d',' -f${n} | tr ',' '\n' | map lambda x . 'echo ${x//u002c/,}'
fi
}
tupl() {
tupx 1 "$@"
}
tupr() {
tupx 1- "$@" | last
}
ntup() {
if [[ $# -eq 0 ]]; then
local arg
read arg
ntup $arg
else
list "$@" | map lambda x . 'echo "$x" | base64 --wrap=0 ; echo' | join , '(' ')'
fi
}
ntupx() {
if [[ $# -eq 1 ]]; then
local arg
read arg
ntupx "$1" "$arg"
else
local n=$1
shift
echo "$@" | stripl '(' | stripr ')' | cut -d',' -f${n} | tr , '\n' | map lambda x . 'echo "$x" | base64 -d'
fi
}
ntupl() {
ntupx 1 "$@"
}
ntupr() {
ntupx 1- "$@" | last
}
lzip() {
local list=$*
cat - | while read x; do
y=$(list $list | take 1)
tup $x $y
list=$(list $list | drop 1)
done
}
curry() {
exportfun=$1; shift
fun=$1; shift
params=$*
cmd=$"function $exportfun() {
more_params=\$*;
$fun $params \$more_params;
}"
eval $cmd
}
with_trampoline() {
local f=$1; shift
local args=$@
while [[ $f != 'None' ]]; do
ret=$($f $args)
# echo $ret
f=$(tupl $ret)
args=$(echo $ret | tupx 2- | tr ',' ' ')
done
echo $args
}
res() {
local value=$1
tup "None" $value
}
call() {
local f=$1; shift
local args=$@
tup $f $args
}
maybe() {
if [[ $# -eq 0 ]]; then
local arg
read arg
maybe "$arg"
else
local x="$*"
local value=$(echo $x | strip)
if [[ ${#value} -eq 0 ]]; then
tup Nothing
else
tup Just "$value"
fi
fi
}
maybemap() {
local x
read x
if [[ $(tupl $x) = "Nothing" ]]; then
echo $x
else
local y=$(tupr "$x")
local r=$(echo "$y" | map "$@")
maybe "$r"
fi
}
maybevalue() {
local default="$*"
local x
read x
if [[ $(tupl $x) = "Nothing" ]]; then
echo "$default"
else
echo $(tupr $x)
fi
do_nothing() {
echo > /dev/null
}
# commonly used predicates for filter
# e.g. list 1 a 2 b 3 c | filter lambda x . 'isint $x'
# inverse another test, e.g. "not isint $x"
not() {
local r=$("$@" 2>/dev/null)
$r && ret false || ret true
}
###############################################
## Useful utility functions
###############################################
isint() {
[ "$1" -eq "$1" ] 2>/dev/null && ret true || ret false
result_to_bool "echo \"$1\" | grep -Eq '^-?[0-9]+$'"
}
isempty() {
[ -z "$1" ] && ret true || ret false
result_to_bool "[ -z \"$1\" ]"
}
isfile() {
[ -f "$1" ] && ret true || ret false
result_to_bool "[ -f \"$1\" ]"
}
isnonzerofile() {
[ -s "$1" ] && ret true || ret false
result_to_bool "[ -s \"$1\" ]"
}
isreadable() {
[ -r "$1" ] && ret true || ret false
result_to_bool "[ -r \"$1\" ]"
}
iswritable() {
[ -w "$1" ] && ret true || ret false
result_to_bool "[ -w \"$1\" ]"
}
isdir() {
[ -d "$1" ] && ret true || ret false
result_to_bool "[ -d \"$1\" ]"
}

View file

@ -1,15 +1,15 @@
#! /bin/bash
testAppendToEmptyList() {
assertEquals 4 "$(list | append 4)"
assertEquals 4 "$(list | list_append 4)"
}
testAppendToOneElementList() {
assertEquals "1 4" "$(list 1 | append 4 | unlist)"
assertEquals "1 4" "$(list 1 | list_append 4 | unlist)"
}
testAppendToList() {
assertEquals "1 2 3 4 5 4" "$(list 1 2 3 4 5 | append 4 | unlist)"
assertEquals "1 2 3 4 5 4" "$(list 1 2 3 4 5 | list_append 4 | unlist)"
}
. ./shunit2-init.sh

View file

@ -1,19 +0,0 @@
#! /bin/bash
testCatchIfSuccess() {
assertEquals 1 "$(echo 'expr 2 / 2' | catch lambda cmd status val . '[[ $status -eq 0 ]] && tupl $val || echo 0')"
}
testCatchIfError() {
assertEquals 0 $(echo 'expr 2 / 0' | catch lambda cmd status val . '[[ $status -eq 0 ]] && tupl $val || echo 0')
assertEquals 'cmd=expr 2 / 0,status=2,val=(expr:,division,by,zero)' "$(echo 'expr 2 / 0' | echo 'expr 2 / 0' | LANG=en catch lambda cmd status val . 'echo cmd=$cmd,status=$status,val=$val')"
}
testCatchEdgeCases() {
assertEquals 1 "$(echo 'expr 2 / 2' | catch lambda _ _ val . 'tupl $val')"
assertEquals 'expr 2 / 2' "$(echo 'expr 2 / 2' | catch lambda cmd . 'ret $cmd')"
assertEquals 'expr 2 / 2,0' "$(echo 'expr 2 / 2' | catch lambda cmd status . 'ret $cmd,$status')"
assertEquals 'expr 2 / 0,2' "$(echo 'expr 2 / 0' | catch lambda cmd status . 'ret $cmd,$status')"
}
. ./shunit2-init.sh

View file

@ -1,23 +1,23 @@
#! /bin/bash
testDrop9From10() {
assertEquals 10 $(list {1..10} | drop 9)
assertEquals 10 $(list {1..10} | list_drop 9)
}
testDrop8From10() {
assertEquals "9 10" "$(list {1..10} | drop 8 | unlist)"
assertEquals "9 10" "$(list {1..10} | list_drop 8 | unlist)"
}
testDropAll() {
assertEquals "" "$(list {1..10} | drop 10)"
assertEquals "" "$(list {1..10} | list_drop 10)"
}
testDropMoreThanAvailable() {
assertEquals "" "$(list {1..10} | drop 15)"
assertEquals "" "$(list {1..10} | list_drop 15)"
}
testDropZero() {
assertEquals "1 2 3 4 5 6 7 8 9 10" "$(list {1..10} | drop 0 | unlist)"
assertEquals "1 2 3 4 5 6 7 8 9 10" "$(list {1..10} | list_drop 0 | unlist)"
}
. ./shunit2-init.sh

View file

@ -1,16 +1,16 @@
#! /bin/bash
testLHeadFromList() {
assertEquals 1 $(list {1..10} | lhead)
assertEquals 5 $(list 5 6 7 | lhead)
assertEquals 1 $(list {1..10} | list_head)
assertEquals 5 $(list 5 6 7 | list_head)
}
testLHeadFromOneElementList() {
assertEquals 1 $(list 1 | lhead)
assertEquals 1 $(list 1 | list_head)
}
testLHeadFromEmptyList() {
assertEquals "" "$(list | lhead)"
assertEquals "" "$(list | list_head)"
}
. ./shunit2-init.sh

View file

@ -1,16 +1,16 @@
#! /bin/bash
testLastFromList() {
assertEquals 10 $(list {1..10} | last)
assertEquals 7 $(list 5 6 7 | last)
assertEquals 10 $(list {1..10} | list_last)
assertEquals 7 $(list 5 6 7 | list_last)
}
testLastFromOneElementList() {
assertEquals 1 $(list 1 | last)
assertEquals 1 $(list 1 | list_last)
}
testLastFromEmptyList() {
assertEquals "" "$(list | last)"
assertEquals "" "$(list | list_last)"
}
. ./shunit2-init.sh

View file

@ -1,38 +1,33 @@
#!/bin/bash
testMapEmptyList() {
assertEquals "" "$(list | map lambda x . 'echo $(($x + 1))')"
assertEquals "" "$(list | list_map lambda x . 'echo $(($x + 1))')"
}
testMapEmptyList_ifNoArgumentsInLambda() {
assertEquals "" "$(list | map lambda . 'echo 3')"
assertEquals "" "$(list | list_map lambda . 'echo 3')"
}
testMapOneElementList() {
assertEquals "3" "$(list 2 | map lambda x . 'echo $(($x + 1))')"
assertEquals "3" "$(list 2 | list_map lambda x . 'echo $(($x + 1))')"
}
testMapList() {
assertEquals "2 3 4 5 6" "$(list {1..5} | map lambda x . 'echo $(($x + 1))' | unlist)"
assertEquals "2 3 4 5 6" "$(list {1..5} | list_map lambda x . 'echo $(($x + 1))' | unlist)"
}
testMapList_ifNoArgumentsInLambda() {
assertEquals "9 9 9 9 9" "$(list {1..5} | map lambda . 'echo 9' | unlist)"
assertEquals "9 9 9 9 9" "$(list {1..5} | list_map lambda . 'echo 9' | unlist)"
}
testMapList_ifManyArgumentsInLambda() {
list {1..5} | map lambda x y . 'echo $(($x + $y))' 2> /dev/null \
list {1..5} | list_map lambda x y . 'echo $(($x + $y))' 2> /dev/null \
&& fail "There should be syntax error, because map is an one argument operation"
}
testFlatMap() {
assertEquals "1 2 3 2 3 3" "$(list {1..3} | map lambda x . 'seq $x 3' | unlist)"
assertEquals "d e h l l l o o r w" "$(list hello world | map lambda x . 'command fold -w 1 <<< $x' | sort | unlist)"
}
testMapNoLambdaSyntax() {
assertEquals "1 2 3" "$(list 1 2 3 | map echo | unlist)"
assertEquals "1 is a number 2 is a number 3 is a number" "$(list 1 2 3 | map 'echo $ is a number' | unlist)"
assertEquals "1 2 3 2 3 3" "$(list {1..3} | list_map lambda x . 'seq $x 3' | unlist)"
assertEquals "d e h l l l o o r w" "$(list hello world | list_map lambda x . 'command fold -w 1 <<< $x' | sort | unlist)"
}
. ./shunit2-init.sh

View file

@ -1,29 +0,0 @@
#! /bin/bash
testMaybe() {
assertEquals '(Just,1)' "$(maybe 1)"
assertEquals '(Just,1)' "$(echo 1 | maybe)"
assertEquals '(Nothing)' "$(maybe '')"
assertEquals '(Nothing)' "$(maybe ' ')"
assertEquals '(Nothing)' "$(maybe ' ' ' ' ' ')"
assertEquals '(Nothing)' "$(echo | maybe)"
assertEquals '(Just,1 2 3)' "$(maybe 1 2 3)"
assertEquals '(Just,1 2 3)' "$(echo 1 2 3 | maybe)"
}
testMaybemap() {
assertEquals '(Just,3)' "$(echo 1 | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo $(( a + 1 ))')"
assertEquals '(Nothing)' "$(echo | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo $(( a + 1 ))')"
assertEquals '(Nothing)' "$(echo 1 | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo')"
assertEquals '(Nothing)' "$(echo 1 | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo' | maybemap lambda a . 'echo $(( a + 1 ))')"
}
testMaybevalue() {
assertEquals 3 "$(echo 1 | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo $(( a + 1 ))' | maybevalue 0)"
assertEquals 0 "$(echo | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo $(( a + 1 ))' | maybevalue 0)"
assertEquals 'a b c' "$(echo | maybe | maybemap lambda a . 'echo $(( a + 1 ))' | maybemap lambda a . 'echo $(( a + 1 ))' | maybevalue a b c)"
}
. ./shunit2-init.sh

View file

@ -8,16 +8,16 @@ testIsint() {
assertEquals '1 2 3 4 5' "$(list 1 a 2 b 3 c 4 d 5 e | filter lambda x . 'isint $x' | unlist )"
assertEquals '1 2' "$(list 1 a 2 b 3 c 4 d 5 e | filter lambda x . '($(isint $x) && [[ $x -le 2 ]] && ret true) || ret false ' | unlist )"
assertEquals 'false' $(not isint 1)
assertEquals 'true' $(not isint a)
assertEquals 'false' $(not "isint 1")
assertEquals 'true' $(not "isint a")
}
testIsempty() {
assertEquals 'true' $(isempty "")
assertEquals 'false' $(isempty a)
assertEquals 'true' $(not isempty a)
assertEquals 'false' $(not isempty "")
assertEquals 'true' $(not "isempty a")
assertEquals 'false' $(not "isempty \"\"")
}
testIsfile() {
@ -26,7 +26,7 @@ testIsfile() {
assertEquals 'true' $(isfile $f)
assertEquals 'false' $(isfile $f.xxx)
assertEquals 'false' $(isfile "")
assertEquals 'true' $(not isfile $f.xxx)
assertEquals 'true' $(not "isfile $f.xxx")
assertEquals 'false' $(isnonzerofile $f)
echo hello world >$f

View file

@ -1,15 +1,15 @@
#! /bin/bash
testPrependToEmptyList() {
assertEquals 4 "$(list | prepend 4)"
assertEquals 4 "$(list | list_prepend 4)"
}
testPrependToOneElementList() {
assertEquals "4 1" "$(list 1 | prepend 4 | unlist)"
assertEquals "4 1" "$(list 1 | list_prepend 4 | unlist)"
}
testPrependToList() {
assertEquals "4 1 2 3 4 5" "$(list 1 2 3 4 5 | prepend 4 | unlist)"
assertEquals "4 1 2 3 4 5" "$(list 1 2 3 4 5 | list_prepend 4 | unlist)"
}
. ./shunit2-init.sh

View file

@ -1,15 +1,15 @@
#! /bin/bash
testLTailFrom10() {
assertEquals "2 3 4 5 6 7 8 9 10" "$(list {1..10} | ltail | unlist)"
assertEquals "2 3 4 5 6 7 8 9 10" "$(list {1..10} | list_tail | unlist)"
}
testLTailFromOneElementList() {
assertEquals "" "$(list 1 | ltail)"
assertEquals "" "$(list 1 | list_tail)"
}
testLTailFromEmptyList() {
assertEquals "" "$(list | ltail)"
assertEquals "" "$(list | list_tail)"
}
. ./shunit2-init.sh

View file

@ -1,23 +1,23 @@
#! /bin/bash
testTake9From10() {
assertEquals "1 2 3 4 5 6 7 8 9" "$(list {1..10} | take 9 | unlist)"
assertEquals "1 2 3 4 5 6 7 8 9" "$(list {1..10} | list_take 9 | unlist)"
}
testTake8From10() {
assertEquals "1 2 3 4 5 6 7 8" "$(list {1..10} | take 8 | unlist)"
assertEquals "1 2 3 4 5 6 7 8" "$(list {1..10} | list_take 8 | unlist)"
}
testTakeAll() {
assertEquals "1 2 3 4 5 6 7 8 9 10" "$(list {1..10} | take 10 | unlist)"
assertEquals "1 2 3 4 5 6 7 8 9 10" "$(list {1..10} | list_take 10 | unlist)"
}
testTakeMoreThanAvailable() {
assertEquals "1 2 3 4 5 6 7 8 9 10" "$(list {1..10} | take 15 | unlist)"
assertEquals "1 2 3 4 5 6 7 8 9 10" "$(list {1..10} | list_take 15 | unlist)"
}
testTakeZero() {
assertEquals "" "$(list {1..10} | take 0 | unlist)"
assertEquals "" "$(list {1..10} | list_take 0 | unlist)"
}
. ./shunit2-init.sh

View file

@ -1,11 +0,0 @@
#! /bin/bash
testTry() {
assertEquals 1 "$(echo 'expr 2 / 2' | try lambda _ . 'ret 0')"
assertEquals 0 "$(echo 'expr 2 / 0' | try lambda _ . 'ret 0')"
assertEquals 2 "$(echo 'expr 2 / 0' | try lambda status . 'ret $status')"
assertEquals 'already up to date' "$(echo 'echo already up to date' | try lambda _ . 'ret error')"
assertEquals 'error exit 1' "$(try λ _ . 'echo "error"; echo exit 1' < <(echo fgit pull) | unlist)"
}
. ./shunit2-init.sh

View file

@ -8,8 +8,8 @@ testTupIfOneElement() {
assertEquals '(1)' $(tup 1)
assertEquals '(")' $(tup '"')
assertEquals "(')" $(tup "'")
assertEquals "(u002c)" $(tup ",")
assertEquals "(u002cu002c)" $(tup ",,")
assertEquals "(,)" $(tup ",")
assertEquals "(,,)" $(tup ",,")
assertEquals "(()" $(tup "(")
assertEquals "())" $(tup ")")
}
@ -20,42 +20,10 @@ testTupHappyPath() {
assertEquals '(a b,c d e,f)' "$(tup 'a b' 'c d e' 'f')"
}
testTupxHappyPath() {
assertEquals '4' $(tup 4 5 1 4 | tupx 1)
assertEquals '5' $(tup 4 5 1 4 | tupx 2)
assertEquals '1' $(tup 4 5 1 4 | tupx 3)
assertEquals '4' $(tup 4 5 1 4 | tupx 4)
}
testTupxIfEmpty() {
assertEquals '' "$(tup '' | tupx 1)"
assertEquals '' "$(tup '' | tupx 5)"
}
testTupxIfZeroIndex() {
assertEquals '' "$(tup 1 3 | tupx 0 2>/dev/null)"
}
testTupxIfSpecialChars() {
assertEquals ',' "$(tup ',' | tupx 1)"
assertEquals ',,' "$(tup ',,' | tupx 1)"
assertEquals '(' "$(tup '(' | tupx 1)"
assertEquals ')' "$(tup ')' | tupx 1)"
assertEquals '()' "$(tup '()' | tupx 1)"
assertEquals '(' "$(tup '(' ')' | tupx 1)"
assertEquals '(' "$(tup '(' '(' | tupx 1)"
assertEquals ')' "$(tup ')' ')' | tupx 1)"
assertEquals ',' "$(tup 'u002c' | tupx 1)"
assertEquals ',,' "$(tup 'u002cu002c' | tupx 1)"
}
testTupxRange() {
assertEquals '4 5' "$(tup 4 5 1 4 | tupx 1-2 | unlist)"
assertEquals '4 4' "$(tup 4 5 1 4 | tupx 1,4 | unlist)"
assertEquals '4 5 4' "$(tup 4 5 1 4 | tupx 1,2,4 | unlist)"
}
testTupl() {
assertEquals '4' "$(tup 4 5 | tupl)"
assertEquals '4' "$(tup 4 5 6 | tupl)"
@ -69,16 +37,4 @@ testTupr() {
assertEquals '5' "$(tup 5 | tupr)"
}
testNTup() {
assertEquals '(KFlRbz0sWWdvPSkK,Ywo=)' "$(ntup $(ntup a b) c)"
assertEquals '(YQo=,Ygo=)' "$(ntupl '(KFlRbz0sWWdvPSkK,Ywo=)')"
assertEquals 'a' "$(ntupl '(YQo=,Ygo=)')"
assertEquals 'b' "$(ntupr '(YQo=,Ygo=)')"
assertEquals 'c' "$(ntupr '(KFlRbz0sWWdvPSkK,Ywo=)')"
assertEquals 'a' "$(ntup $(ntup a b) c | ntupx 1 | ntupx 1)"
assertEquals 'b' "$(ntup $(ntup a b) c | ntupx 1 | ntupx 2)"
assertEquals 'c' "$(ntup $(ntup a b) c | ntupx 2)"
assertEquals 'a b' "$(ntup $(ntup a b) c | ntupx 1 | ntupx 1,2 | unlist)"
}
. ./shunit2-init.sh