Loops/With multiple ranges: Difference between revisions
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across (y |..| x).new_cursor + (-z - 1) as ic loop process.call (ic.item) end |
across (y |..| x).new_cursor + (-z - 1) as ic loop process.call (ic.item) end |
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across (11^x).truncated_to_integer |..| ((11^x).truncated_to_integer + 1) as ic loop process.call (ic.item) end |
across (11^x).truncated_to_integer |..| ((11^x).truncated_to_integer + 1) as ic loop process.call (ic.item) end |
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print ("%N") |
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print ("sum = " + sum.out + "%N") -- sum = 348,173 |
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print ("prod = " + prod.out + "%N") -- prod = -793,618,560 |
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end |
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end |
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</lang> |
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Alternatively, there is the "symbolic form" of the across loop, which modifies the code as follows: |
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<lang eiffel> |
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class |
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APPLICATION |
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create |
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make |
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feature |
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prod, sum, x, y, z, one, three, seven: INTEGER |
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make |
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local |
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process: PROCEDURE |
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do |
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prod := 1; x := 5; y := -5; z := -2; one := 1; three := 3; seven := 7 |
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process := (agent (j: INTEGER) |
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do |
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print (j.out + ", ") |
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sum := sum + j.abs |
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if prod.abs < 2^27 and j /= 0 then |
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prod := prod * j |
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end |
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end) |
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⟳ ic: (-three |..| (3^3).truncated_to_integer).new_cursor + (three - 1) ¦ process.call (ic) ⟲ |
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⟳ ic: (-seven |..| seven).new_cursor + (x - 1) ¦ process.call (ic) ⟲ |
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⟳ ic:555 |..| (550 - y) ¦ process.call (ic) ⟲ |
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⟳ ic: (-26 |..| 22).new_cursor + (three - 1) ¦ process.call (ic) ⟲ |
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⟳ ic: 1927 |..| 1939 ¦ process.call (ic) ⟲ |
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⟳ ic: (y |..| x).new_cursor + (-z - 1) ¦ process.call (ic) ⟲ |
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⟳ ic: (11^x).truncated_to_integer |..| ((11^x).truncated_to_integer + 1) ¦ process.call (ic) ⟲ |
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print ("%N") |
print ("%N") |
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