diff options
Diffstat (limited to 'pod/perlfunc.pod')
-rw-r--r-- | pod/perlfunc.pod | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/pod/perlfunc.pod b/pod/perlfunc.pod index 00fc8601a4..78a631883e 100644 --- a/pod/perlfunc.pod +++ b/pod/perlfunc.pod @@ -1265,11 +1265,11 @@ there was an error. In the first form, the return value of EXPR is parsed and executed as if it were a little Perl program. The value of the expression (which is itself determined within scalar context) is first parsed, and if there weren't any -errors, executed in the context of the current Perl program, so that any -variable settings or subroutine and format definitions remain afterwards. -Note that the value is parsed every time the eval executes. If EXPR is -omitted, evaluates C<$_>. This form is typically used to delay parsing -and subsequent execution of the text of EXPR until run time. +errors, executed in the lexical context of the current Perl program, so +that any variable settings or subroutine and format definitions remain +afterwards. Note that the value is parsed every time the eval executes. +If EXPR is omitted, evaluates C<$_>. This form is typically used to +delay parsing and subsequent execution of the text of EXPR until run time. In the second form, the code within the BLOCK is parsed only once--at the same time the code surrounding the eval itself was parsed--and executed @@ -2078,9 +2078,9 @@ or equivalently, @foo = grep {!/^#/} @bar; # weed out comments -Note that, because C<$_> is a reference into the list value, it can -be used to modify the elements of the array. While this is useful and -supported, it can cause bizarre results if the LIST is not a named array. +Note that C<$_> is an alias to the list value, so it can be used to +modify the elements of the LIST. While this is useful and supported, +it can cause bizarre results if the elements of LIST are not variables. Similarly, grep returns aliases into the original list, much as a for loop's index variable aliases the list elements. That is, modifying an element of a list returned by grep (for example, in a C<foreach>, C<map> @@ -2462,9 +2462,9 @@ is just a funny way to write $hash{getkey($_)} = $_; } -Note that, because C<$_> is a reference into the list value, it can -be used to modify the elements of the array. While this is useful and -supported, it can cause bizarre results if the LIST is not a named array. +Note that C<$_> is an alias to the list value, so it can be used to +modify the elements of the LIST. While this is useful and supported, +it can cause bizarre results if the elements of LIST are not variables. Using a regular C<foreach> loop for this purpose would be clearer in most cases. See also L</grep> for an array composed of those items of the original list for which the BLOCK or EXPR evaluates to true. |