perl/lib/builtin.pm

47 Calling functions in it will trigger warnings of the C<experimental::builtin>
53 to these builtin functions. This is similar to the lexical effect of other
110 distinguished boolean value is the result of any boolean-returning builtin
113 or any variable containing one of these results.
123 count of its referent. If only weakened references to a referent remain, it
124 will be disposed of, and all remaining weak references to it will have their
131 Strengthens a reference, undoing the effects of a previous call to L</weaken>.
162 Returns the basic container type of the referent of a reference, or C<undef>
172 assignment or modification was of a string-like nature - such as assignment
173 from a string literal, or the result of a string operation such as
193 assignment or modification was of a numerical nature - such as assignment from
194 a number literal, or the result of a numerical operation such as addition. It
199 within Perl, as it will not return true for regular strings of decimal digits
232 Returns an even-sized list of number/value pairs, where each pair is formed
233 of a number giving an index in the original list followed by the value at that
234 position in it.  I.e. returns a list twice the size of the original, being
239 Note that unlike the core C<values> function, this function returns copies of
240 its original arguments, not aliases to them. Any modifications of these copies
253 In scalar context this function returns the size of the list that it would
297 by the first of each pair of values will refer to the corresponding item whose
298 reference is given by the second. Types of item that are permitted are
302 required, and must match the type of the variable.
318 block. Usually this would be used as part of an C<import> method of a module,
319 when invoked as part of a C<use ...> statement.