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!! +exec+ +var+ +string+
11210 bpr 2
tit:embraced
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type:$type_both
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syntax:!embraced `opword string'
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mean:executes an operation `opword' in each substring of `string' enclosed in a pair \
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  of curly braces.\
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  <p>\
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  The curly braces in `string' can be nested, but the execution runs from outmost pair \
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  to innermost pair.\
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  </p><p>\
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  Available `opword':\
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  </p><ul>\
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  <li><span class="tt">randitem</span>. Random item in every embraced text.</li>\
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  <li><span class="tt">extract</span>. Extracts the first (outmost) embraced text.</li>\
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  <li><span class="tt">delete</span>. Deletes all embraced contents (encluding the curly braces).</li>\
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  </ul>