Author: lwall Date: 2009-09-01 20:04:33 +0200 (Tue, 01 Sep 2009) New Revision: 28160

Modified: docs/Perl6/Spec/S32-setting-library/Numeric.pod Log: [S32] clean up some numeric spec fossils Modified: docs/Perl6/Spec/S32-setting-library/Numeric.pod =================================================================== --- docs/Perl6/Spec/S32-setting-library/Numeric.pod 2009-09-01 16:21:23 UTC (rev 28159) +++ docs/Perl6/Spec/S32-setting-library/Numeric.pod 2009-09-01 18:04:33 UTC (rev 28160) @@ -19,8 +19,8 @@ Created: 19 Mar 2009 extracted from S29-functions.pod - Last Modified: 18 Jul 2009 - Version: 2 + Last Modified: 1 Sep 2009 + Version: 3 The document is a draft. @@ -58,14 +58,12 @@ B<API document>: L<Num> -C<Num> provides a number of constants in addition to the basic -mathematical functions. To get these constants, you must request -them: +C<Num> provides some constants in addition to the basic +mathematical functions. - use Num :constants; + constant pi is export = 3.14159_26535_89793_23846_26433_83279_50288; + constant e is export = 2.71828_18284_59045_23536_02874_71352_66249; -or use the full name, e.g. C<Num::pi>. - =over =item succ @@ -112,14 +110,15 @@ =item truncate our Int multi method truncate ( Num $x: ) is export - our Int multi method int ( Num $x: ) is export Returns the closest integer to C<$x> whose absolute value is not greater than the absolute value of C<$x>. (In other words, just chuck any -fractional part.) This is the default rounding function used by an -C<int()> cast, for historic reasons. But see Int constructor above -for a rounded version. +fractional part.) This is the default rounding function used by +implicit integer conversions. +You may also truncate using explicit integer casts, either C<Int()> for +an arbitrarily large integers, or C<int()> for native integers. + =item exp our Num multi method exp ( Num $exponent: Num :$base = Num::e ) is export @@ -142,14 +141,13 @@ =item rand - our Num method rand ( Num $x: ) our Num term:<rand> -Pseudo random number in range C<< 0 ..^ $x >>. That is, C<0> is -theoretically possible, while C<$x> is not. The C<rand> function -is 0-ary and always produces a number from C<0..^1>. In any case, -for picking a random integer you probably want to use something like -C<(1..6).pick> instead. +Pseudo random number in range C<< 0 ..^ 1 >>. That is, C<0> is +theoretically possible, while C<1> is not. Note that there is no +unary C<rand> function in PerlĀ 6, so just multiply C<rand> by your +desired multiplier. For picking a random integer you probably want +to use something like C<(1..6).pick> instead. =item sign @@ -195,11 +193,15 @@ =item i - our Num multi method i ( Num $x: ) + our Num multi postfix:<i> ( Num $x ) Returns a complex number representing the parameter multiplied by the imaginary -unit C<i>. +unit C<i>. Note that there is no C<.i> method. To follow a variable name +with the postfix, it's necessary to use a backslash or parentheses: + $land\i + ($land)i + =back