Loops/Wrong ranges: Difference between revisions
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Start equal stop equal zero: zero increment [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] (loops forever) |
Start equal stop equal zero: zero increment [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] (loops forever) |
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</pre> |
</pre> |
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=={{header|jq}}== |
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jq has a filter `range(start; stop; increment)` which emits a |
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(possibly empty) stream of numbers if given numeric inputs. |
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It meets the task criterion, e.g. `range(0;1;0.4)` generates 3 numbers. |
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In fact, it is quite similar to C's `for (i=start; i < stop; i+=increment)` |
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except that if `increment` is 0 or in the "wrong" direction, then nothing is emitted. |
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None of the cases enumerated in the task description results in an error, |
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and in all but two cases, the result is the empty stream. |
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To streamline the presentation of results, rather than showing the stream |
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of values generated by stream(start;stop;increment), we will show the |
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array of the generated values. |
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<pre> |
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[range(-2; 2; 1)] #=> [-2,-1,0,1] |
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[range(-2; 2; 0)] #=> [] |
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[range(-2; 2; -1)] #=> [] |
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[range(-2; 2; 10)] # [-2] |
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[range(2; -2; 1)] #=> [] |
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[range(2; 2; 1)] #=> [] |
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[range(2; 2; 0)] #=> [] |
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[range(0; 0; -1)] #=> [] |
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</pre> |
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=={{header|Julia}}== |
=={{header|Julia}}== |
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