First-class functions/Use numbers analogously: Difference between revisions
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=={{header|Mathematica}}== |
=={{header|Mathematica}}== |
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{{incorrect|Mathematica|Compare and contrast the resultant program with the corresponding entry in First-class functions.}} |
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This code demonstrates the example using structure similar to function composition, however the composition function is replace with the multiplier function. |
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f[a, b] |
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x = 2; xi = 0.5; y = 4; yi = 0.25; z = x + y; zi = 1/(x + y); |
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f[x, xi][0.5] |
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f[y, yi][0.5] |
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f[z, zi][0.5]</lang> |
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<lang Mathematica>multiplier[n1_,n2_]:=n1 n2 #& |
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For example: |
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num={2,4,2+4}; |
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<pre>a b #1 & |
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numi=1/num; |
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multiplierfuncs = multiplier @@@ Transpose[{num, numi}]; |
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</lang> |
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The resulting functions are unity multipliers: |
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0.5 |
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<pre>Table[i[0.666], {i, multiplierfuncs}] |
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{0.666, 0.666, 0.666}</pre> |
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0.5 |
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Note that unlike Composition, the above definition of multiplier only allows for exactly two arguments. The definition can be changed to allow any nonzero number of arguments: |
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0.5</pre> |
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</lang> |
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=={{header|Nemerle}}== |
=={{header|Nemerle}}== |
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