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https://github.com/Jermolene/TiddlyWiki5
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62 lines
1.9 KiB
Plaintext
62 lines
1.9 KiB
Plaintext
created: 20171221184734665
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modified: 20171229211834620
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tags: [[Filter Operators]] [[Negatable Operators]]
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title: range Operator
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type: text/vnd.tiddlywiki
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caption: range
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op-purpose: generate a range of numbers
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op-input: ignored
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op-parameter: a range specification, like `[1,5]`
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op-parameter-name: N
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op-output: a series of evenly spaced numbers ranging from `<begin>` to `<end>`
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\define range_example(range)
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```
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[range[$range$]]
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```
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<$list variable=n filter="[range[$range$]]"><<n>> </$list>
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\end
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The `range` operator produces a list of numbers counting up or down. It's useful for counting and numbering, or in combination with the [[Formula Plugin]].
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|!Purpose|produce a range of numbers|
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|!Input|ignored.|
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|!Parameter|1-3 numbers separated by `,` or `;`.|
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|!Output|A series of evenly spaced numbers ranging from `<begin>` to `<end>`|
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|!`!` Output|As ''Output'', but with order reversed.|
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The parameter has three forms:
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|Parameter|Output|h
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|`<end>`|Whole numbers up to `<end>`.|
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|`<begin>,<end>`|Numbers from `<begin>` to `<end>`, spaced by whole numbers.|
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|`<begin>,<end>,<step>`|Numbers from `<begin>` to `<end>` spaced out by `<step>`.|
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Each part must be a number, and works as follows:
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* `<begin>`: start counting at this number.
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** Defaults to 1 if `<end>` is at least 1 (or -1 if `<end>` is at most -1).
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* `<end>`: stop counting at this number.
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** This number will appear in the list unless it falls between two steps.
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* `<step>`: count up (or down) by this amount.
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** Defaults to 1.
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** Cannot be zero.
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** We always count from `<begin>` toward `<end>`, whether `<step>` is positive or negative.
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The number of decimal points in the output is fixed, and based on the parameter with the //most// decimal points.
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To prevent the browser from freezing, `range` is currently limited to 10,000 values.
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!!Examples
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<<range_example "7">>
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<<range_example "1, 10">>
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<<range_example "17,13">>
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<<range_example "1.001, 5, 1">>
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<<range_example ".5,1.4,.004">> |