Ellipsis (computer programming): Difference between revisions

Revision as of 09:40, 11 October 2017

Revision as of 10:02, 26 February 2018

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In Ruby the <code>...</code> operator denotes a half-open range, i.e. that includes the start value but not the end value.

In Rust the <code>...=</code> operator denotes an inclusive range for cases in matches and the <code>..</code> operator represents a range not including the end value.

Perl and Ruby [[Operator overloading|overload]] the ".." operator in scalar context as a [[flip-flop operator]] - a [[stateful]] [[bistability|bistable]] [[Boolean datatype|Boolean]] test, roughly equivalent to "true while ''x'' but not yet ''y''", similarly to the "," operator in [[Sed (programming language)|sed]] and [[AWK programming language|AWK]].<ref>[http://perldoc.perl.org/perlop.html#Range-Operators-operator%2c-range-range-..-... perlop - perldoc.perl.org<!-- Bot generated title -->]</ref> In Perl6 an actual [[Unicode]] (U+2026) ellipsis (…) character is used to serve as a type of marker in a format string.<ref>[http://dev.perl.org/perl6/doc/design/exe/E07.html#And_mark_what_way_I_make... Exegesis 7: Formats - perl6<!-- Bot generated title -->]{{Self-published inline|date=January 2011}}</ref>