Re2: Sorting data pullled in by DBI

My favorite idiom for defaulting a set of values is:

# psuedocode
$_ = DEFAULT for grep !CONDITION, @VALUES;

# as it applies in this situation
$_ = '&nbsp;' for grep !$_, @row;
[download]

-Blake

Comment on Re2: Sorting data pullled in by DBI Download Code

Replies are listed 'Best First'.
Re: Re2: Sorting data pullled in by DBI by Kanji (Parson) on Mar 18, 2002 at 02:57 UTC
The problem with `!$_` (and jeffa's `map` example), is that it tests for truth, so you also end up substituting any values that match `0` instead of only those that are `undef`. Perhaps you meant to use `!defined` instead? --k.	[reply]
Re4: Sorting data pullled in by DBI by blakem (Monsignor) on Mar 18, 2002 at 03:46 UTC
Yes, `!defined` is probably a better CONDITON for the original data... I was merely refactoring the given map code. However, since you probably want the empty string to be defaulted as well, I'd probably use something like: `$_ = ' ' for grep {!defined or $_ eq ''} @arr;` [download] -Blake	[reply] [d/l] [select]