Re: grep question

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Re^2: grep question by demerphq (Chancellor) on May 26, 2005 at 21:31 UTC
I think you meant: `perl -le 'print map { /param=(.*)/ ? $1 : () } "param=value";'` [download] $1 is only set if the match is succesful. (merlyn i beat you to it ;-) --- $world=~s/war/peace/g	[reply] [d/l]
Re^3: grep question by trammell (Priest) on May 26, 2005 at 22:06 UTC
No, the OP describes the input as a 'param=value' list. I stand by my post.	[reply]
Re^4: grep question by brian_d_foy (Abbot) on May 26, 2005 at 22:27 UTC
So, you would rather beleive that the input is always exacctly what you expect rather than add ten characters to handle the situations where it isn't? "Expected user input" tends to not be. In general, don't use any of the match variables without knowing the match succeeded. It doesn't matter what else is going on. Don't let yourself get into bad habits, or take shortcuts because you think the data will always be perfect. The real answer, however, smells like `use CGI;` -- brian d foy <brian@stonehenge.com>	[reply] [d/l]
Re^5: grep question by trammell (Priest) on May 26, 2005 at 23:26 UTC
Re^2: grep question by newest_newbie (Acolyte) on May 26, 2005 at 22:26 UTC
Thanks Thanks for all the advises I actually had tried something like `map { /param=(.)/; return $1; }` which did not work. I have modified my code to be like this `return map { /memtype=(.?)"/i ? $1 : (); } $self -> collect_data ('all');` as suggested by you monks! PS: I hope at least the reply post looks better !!	[reply] [d/l] [select]
Re^3: grep question by Joost (Canon) on May 26, 2005 at 23:21 UTC
`return`ing from a grep actually returns from the underlying subroutine (not just the grep statement), so you probably don't want that (unless you want to return the first match in some perverse way) Update: ps: please use `<code>` tags for code (not pre) and use regular HTML for the rest (except links: use `[link name or id://xxxxx]` for them) see writeup formatting tips "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply] [d/l] [select]