Re^2: map and return

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Re^3: map and return by Anonymous Monk on Sep 03, 2009 at 11:22 UTC
What is the prototype for map? It is undef because its arguments cannot be expressed by a prototype because the builtin does not really behave like a Perl function.	[reply]
Re^4: map and return by ELISHEVA (Prior) on Sep 03, 2009 at 12:08 UTC
As near as I can tell, no built-in function listed in index-functions has a prototype (just checked) and some of these behave more normally with regards to return. For instance, both `map` and `sort` are on that list. Neither `map` nor `sort` have defined prototypes, but sort treats the return inside the block as if it were returning from a subroutine, just like my custom `sub foo` above. `# no compile problems here! my @x = sort { return $a <=> $b; } (3, 2, 1); print "sorted: (@x)\n"; #prints: sorted (1, 2, 3)` [download] Best, beth Update: Struck out incorrect portion of post - forgot to include "CORE::" in the function name, as pointed out by Anonymous Monk below.	[reply] [d/l] [select]
Re^5: map and return by Anonymous Monk on Sep 03, 2009 at 12:27 UTC
..has a prototype (just checked) `perl -le"printf qq~%10s %s \n~, $_, prototype(qq!CORE::$_!) for @ARGV" + abs int push pop map grep sort stat abs ;$ int ;$ push \@@ pop ;\@ map grep sort stat *` [download]	[reply] [d/l]
Re^6: map and return by ELISHEVA (Prior) on Sep 03, 2009 at 12:36 UTC
Re^7: map and return by ikegami (Patriarch) on Sep 03, 2009 at 14:49 UTC