Set: Difference between revisions
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(Added second method to Quackery) |
(→{{header|Quackery}}: logic on "difference" was reversed) |
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[ join --duplicates ] is symmdiff ( { { --> { ) |
[ join --duplicates ] is symmdiff ( { { --> { ) |
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[ |
[ over intersection symmdiff ] is difference ( { { --> { ) |
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[ over intersection = ] is subset ( { { --> b ) |
[ over intersection = ] is subset ( { { --> b ) |
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( ------------------------------ demo ------------------------------ ) |
( ------------------------------ demo ------------------------------ ) |
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| ⚫ | |||
| ⚫ | |||
set{ red orange green blue |
set{ red orange green blue |
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purple apricot peach }set is colours ( --> { ) |
purple apricot peach }set is colours ( --> { ) |
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| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
colours dup echoset say " are colours" cr |
colours dup echoset say " are colours" cr |
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| ⚫ | |||
| ⚫ | |||
2dup intersection echoset say " are both fruits and colours" cr |
2dup intersection echoset say " are both fruits and colours" cr |
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| ⚫ | |||
2dup union echoset say " are fruits or colours" cr |
2dup union echoset say " are fruits or colours" cr |
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2dup symmdiff echoset say " are fruits or colours but not both" cr |
2dup symmdiff echoset say " are fruits or colours but not both" cr |
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difference echoset say " are fruits that are not colours" cr |
difference echoset say " are fruits that are not colours" cr |
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set{ red green blue }set dup echoset say " are" |
set{ red green blue }set dup echoset say " are" |
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colours subset not if [ say " not" ] say " all colours" cr |
colours subset not if [ say " not" ] say " all colours" cr |
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say "fruits and colours are" fruits colours = not if [ say " not" ] |
say "fruits and colours are" fruits colours = not if [ say " not" ] |
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say " exactly the same" cr |
say " exactly the same" cr |
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$ "orange" dup echo$ say " is" |
$ "orange" dup echo$ say " is" |
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fruits element not if [ say " not" ] say " a fruit" cr |
fruits element not if [ say " not" ] say " a fruit" cr |
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set{ orange }set dup echoset say " is" |
set{ orange }set dup echoset say " is" |
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fruits propersubset dup if [ say " not" ] say " the only fruit" |
fruits propersubset dup if [ say " not" ] say " the only fruit" |
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{{out}} |
{{out}} |
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<pre>{ apricot |
<pre>{ apple apricot banana melon orange peach pear } are fruits |
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{ |
{ apricot blue green orange peach purple red } are colours |
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{ apricot orange peach } are both fruits and colours |
{ apricot orange peach } are both fruits and colours |
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{ apple apricot banana blue green melon orange peach pear purple red } are fruits or colours |
{ apple apricot banana blue green melon orange peach pear purple red } are fruits or colours |
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[ ^ ] is symmdiff ( { { --> { ) |
[ ^ ] is symmdiff ( { { --> { ) |
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[ |
[ over intersection symmdiff ] is difference ( { { --> { ) |
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[ over intersection = ] is subset ( { { --> b ) |
[ over intersection = ] is subset ( { { --> b ) |
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( ----------------------------- demo ---------------------------- ) |
( ----------------------------- demo ---------------------------- ) |
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| ⚫ | |||
| ⚫ | |||
set{ red orange green blue |
set{ red orange green blue |
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purple apricot peach }set is colours ( --> { ) |
purple apricot peach }set is colours ( --> { ) |
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| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
colours dup echoset say " are colours" cr |
colours dup echoset say " are colours" cr |
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| ⚫ | |||
| ⚫ | |||
| ⚫ | |||
2dup intersection echoset say " are both fruits and colours" cr |
2dup intersection echoset say " are both fruits and colours" cr |
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{{out}} |
{{out}} |
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<pre>{ |
<pre>{ orange banana apricot melon pear peach apple } are fruits |
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{ |
{ purple blue green red orange apricot peach } are colours |
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{ |
{ orange apricot peach } are both fruits and colours |
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{ |
{ purple blue green red orange banana apricot melon pear peach apple } are fruits or colours |
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{ |
{ purple blue green red banana melon pear apple } are fruits or colours but not both |
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{ banana melon pear apple } are fruits that are not colours |
{ banana melon pear apple } are fruits that are not colours |
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{ blue green red } are all colours |
{ blue green red } are all colours |
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