Function composition: Difference between revisions
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→{{header|Amazing Hopper}}
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Line 183:
F sin arc sin = compose(sin, arc sin);
print((sin arc sin(0.5), (sin O arc sin)(0.5), new line))</syntaxhighlight>
=={{header|Amazing Hopper}}==
VERSION 1:
<syntaxhighlight lang="c">
#defn Compose(_FX_,_FY_) _FX_,_FY_
main:
0.5,Compose(sin,arcsin)
"\n", print
{0}return
</syntaxhighlight>
{{out}}
<pre>
$ hopper3 basica/compose1.hop
0.500000
</pre>
VERSION 2:
<syntaxhighlight lang="c">
#define-a «(_X_) _X_ )
#define Compose(_FX_,_FY_) _FC_(_FX_,_FY_,
#define _FC_(_X_,_Y_,*) *,_X_,_Y_
main:
Compose(sin,arcsin)«( 0.5)
"\n", print
{0}return
</syntaxhighlight>
{{out}}
<pre>
$ hopper3 basica/compose2.hop
0.500000
</pre>
VERSION 3:
<syntaxhighlight lang="c">
#define «(_X_) _X_ )
#define Compose(_FX_,_FY_) _FC_(_FX_,_FY_,
#define _FC_(_X_,_Y_,*) *,_X_,_Y_
main:
Compose(sin,arcsin)«( 0.5, mul by '2' )
"\n", print
{0}return
</syntaxhighlight>
{{out}}
<pre>
$ hopper3 basica/compose2.hop
1.000000
</pre>
<p>The power of macro-substitution, by Hopper!</p>
=={{header|AntLang}}==
Line 616 ⟶ 669:
b = compose(->double ->add1)
p b 1 #should print 4</syntaxhighlight>
=={{header|Bruijn}}==
Composition operators as defined in <code>std/Combinator</code>:
<syntaxhighlight lang="bruijn">
:import std/Number .
# 1x composition, bluebird combinator
…∘… [[[2 (1 0)]]]
:test (((inc ∘ (mul (+2))) (+3)) =? (+7)) ([[1]])
# 2x composition, blackbird combinator
…∘∘… [[[[3 (2 1 0)]]]]
:test (((inc ∘∘ mul) (+2) (+3)) =? (+7)) ([[1]])
# 3x composition, bunting combinator
…∘∘∘… [[[[[4 (3 2 1 0)]]]]]
:test (((inc ∘∘∘ (add ∘∘ mul)) (+1) (+2) (+4)) =? (+7)) ([[1]])
# reverse composition, queer bird combinator
…→… [[[1 (2 0)]]]
:test ((((mul (+2)) → inc) (+3)) =? (+7)) ([[1]])
</syntaxhighlight>
=={{header|C}}==
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