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Missed of reverting the list widget iterator variables commits
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title: IteratorVariables
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tags: ListWidget Variables
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created: 20150106180000000
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modified: 20150106180000000
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The ListWidget exposes the following iterator variables during list processing:
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; `<<iterator>>`
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: set to the current index, e.g. `1`
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; `<<iterator-even>>`
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: set to `true` for an even index, otherwise `false`
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; `<<iterator-last>>`
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: set to `true` for last index, otherwise `false`
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The ListWidget allows to declare an `iterator` attribute through which you can declare a custom iterator variable prefix:
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```
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<$list filter="[tag[foo]]" iterator="my-foo">
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...
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</$list>
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```
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!!Using Iterator Variables
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You can use iterator variables with the RevealWidget to conditionally render output depending on the current index...
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''only show for item at index 1, i.e. the first item''
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```
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<$reveal type=match default=1 text=<<my-foo>>>
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...
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</$reveal>
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```
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''show for all except first index''
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```
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<$reveal type=nomatch default=1 text=<<my-foo>>>
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...
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</$reveal>
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```
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''only show at even indexes''
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```
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<$reveal type=match default=true text=<<my-foo-even>>>
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...
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</$reveal>
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```
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''only show at uneven indexes''
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```
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<$reveal type=nomatch default=true text=<<my-foo-even>>>
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...
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</$reveal>
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```
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''only show for last index''
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```
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<$reveal type=match default=true text=<<my-foo-last>>>
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...
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</$reveal>
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```
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!! Live Example
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```
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<dl>
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<$list filter="one two three" iterator=foo>
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<dt><<currentTiddler>></dt>
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<dd>`<<foo>>` = <<foo>></dd>
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<dd>`<<foo-even>>` = <<foo-even>></dd>
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<dd>`<<foo-last>>` = <<foo-last>></dd>
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</$list>
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</dl>
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```
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Displays as:
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<<<
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<dl>
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<$list filter="one two three" iterator=foo>
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<dt><<currentTiddler>></dt>
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<dd>`<<foo>>` = <<foo>></dd>
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<dd>`<<foo-even>>` = <<foo-even>></dd>
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<dd>`<<foo-last>>` = <<foo-last>></dd>
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</$list>
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</dl>
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<<<
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